./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/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_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:37:59,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:37:59,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:37:59,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:37:59,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:37:59,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:37:59,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:37:59,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:37:59,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:37:59,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:37:59,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:37:59,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:37:59,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:37:59,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:37:59,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:37:59,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:37:59,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:37:59,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:37:59,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:37:59,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:37:59,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:37:59,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:37:59,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:37:59,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:37:59,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:37:59,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:37:59,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:37:59,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:37:59,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:37:59,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:37:59,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:37:59,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:37:59,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:37:59,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:37:59,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:37:59,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:37:59,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:37:59,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:37:59,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:37:59,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:37:59,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:37:59,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:37:59,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:37:59,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:37:59,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:37:59,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:37:59,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:37:59,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:37:59,293 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:37:59,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:37:59,294 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:37:59,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:37:59,294 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:37:59,294 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:37:59,295 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:37:59,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:37:59,295 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:37:59,295 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:37:59,295 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:37:59,296 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:37:59,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:37:59,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:37:59,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:37:59,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:37:59,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:37:59,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:37:59,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:37:59,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:37:59,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:37:59,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:37:59,299 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:37:59,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:37:59,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:37:59,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:37:59,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:37:59,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:37:59,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:37:59,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:37:59,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:37:59,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:37:59,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:37:59,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:37:59,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:37:59,302 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2021-11-23 02:37:59,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:37:59,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:37:59,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:37:59,629 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:37:59,630 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:37:59,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-23 02:37:59,688 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/data/dbecf48cd/b6ef2cd6706141af9483d116b037875e/FLAG4d036edb9 [2021-11-23 02:38:00,345 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:38:00,350 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-23 02:38:00,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/data/dbecf48cd/b6ef2cd6706141af9483d116b037875e/FLAG4d036edb9 [2021-11-23 02:38:00,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/data/dbecf48cd/b6ef2cd6706141af9483d116b037875e [2021-11-23 02:38:00,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:38:00,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:38:00,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:38:00,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:38:00,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:38:00,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:00" (1/1) ... [2021-11-23 02:38:00,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c560cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:00, skipping insertion in model container [2021-11-23 02:38:00,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:00" (1/1) ... [2021-11-23 02:38:00,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:38:00,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:38:00,853 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-23 02:38:01,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:38:01,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:38:01,217 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-23 02:38:01,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:38:01,348 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:38:01,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01 WrapperNode [2021-11-23 02:38:01,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:38:01,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:38:01,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:38:01,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:38:01,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,511 INFO L137 Inliner]: procedures = 90, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1061 [2021-11-23 02:38:01,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:38:01,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:38:01,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:38:01,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:38:01,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:38:01,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:38:01,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:38:01,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:38:01,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (1/1) ... [2021-11-23 02:38:01,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:38:01,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:01,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:38:01,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:38:01,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:38:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 02:38:01,700 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 02:38:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 02:38:01,700 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 02:38:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 02:38:01,701 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 02:38:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 02:38:01,701 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 02:38:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-23 02:38:01,702 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-23 02:38:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 02:38:01,702 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 02:38:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:38:01,702 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:38:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:38:01,703 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:38:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 02:38:01,703 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 02:38:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 02:38:01,704 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 02:38:01,704 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 02:38:01,704 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 02:38:01,704 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 02:38:01,704 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 02:38:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 02:38:01,705 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 02:38:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 02:38:01,705 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 02:38:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 02:38:01,706 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 02:38:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 02:38:01,706 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 02:38:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 02:38:01,706 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 02:38:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 02:38:01,707 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 02:38:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:38:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 02:38:01,707 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 02:38:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 02:38:01,708 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 02:38:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 02:38:01,708 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 02:38:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:38:01,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:38:01,709 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 02:38:01,709 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 02:38:01,839 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:38:01,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:38:03,106 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:38:03,715 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:38:03,715 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:38:03,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:38:03 BoogieIcfgContainer [2021-11-23 02:38:03,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:38:03,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:38:03,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:38:03,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:38:03,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:38:00" (1/3) ... [2021-11-23 02:38:03,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6625f830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:38:03, skipping insertion in model container [2021-11-23 02:38:03,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:01" (2/3) ... [2021-11-23 02:38:03,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6625f830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:38:03, skipping insertion in model container [2021-11-23 02:38:03,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:38:03" (3/3) ... [2021-11-23 02:38:03,731 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2021-11-23 02:38:03,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:38:03,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:38:03,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:38:03,832 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:38:03,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:38:03,859 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) [2021-11-23 02:38:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:38:03,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:03,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:03,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash -484411217, now seen corresponding path program 1 times [2021-11-23 02:38:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:03,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134231809] [2021-11-23 02:38:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:03,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:38:04,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134231809] [2021-11-23 02:38:04,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134231809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:04,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:04,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:38:04,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840438005] [2021-11-23 02:38:04,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:04,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:38:04,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:38:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:38:04,491 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) [2021-11-23 02:38:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:05,196 INFO L93 Difference]: Finished difference Result 1019 states and 1636 transitions. [2021-11-23 02:38:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:38:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2021-11-23 02:38:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:05,238 INFO L225 Difference]: With dead ends: 1019 [2021-11-23 02:38:05,263 INFO L226 Difference]: Without dead ends: 673 [2021-11-23 02:38:05,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:38:05,288 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 523 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:05,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 2288 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:38:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-23 02:38:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2021-11-23 02:38:05,445 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) [2021-11-23 02:38:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1062 transitions. [2021-11-23 02:38:05,462 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1062 transitions. Word has length 73 [2021-11-23 02:38:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:05,466 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1062 transitions. [2021-11-23 02:38:05,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:38:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1062 transitions. [2021-11-23 02:38:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:38:05,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:05,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:05,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:38:05,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1001026953, now seen corresponding path program 1 times [2021-11-23 02:38:05,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:05,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436511158] [2021-11-23 02:38:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:05,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:38:05,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436511158] [2021-11-23 02:38:05,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436511158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:05,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:05,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:38:05,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537061272] [2021-11-23 02:38:05,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:05,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:38:05,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:38:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:38:05,689 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) [2021-11-23 02:38:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:06,383 INFO L93 Difference]: Finished difference Result 764 states and 1209 transitions. [2021-11-23 02:38:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:38:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2021-11-23 02:38:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:06,391 INFO L225 Difference]: With dead ends: 764 [2021-11-23 02:38:06,391 INFO L226 Difference]: Without dead ends: 762 [2021-11-23 02:38:06,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:38:06,393 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:06,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:38:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-23 02:38:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 752. [2021-11-23 02:38:06,438 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) [2021-11-23 02:38:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1175 transitions. [2021-11-23 02:38:06,449 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1175 transitions. Word has length 77 [2021-11-23 02:38:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:06,450 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1175 transitions. [2021-11-23 02:38:06,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:38:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1175 transitions. [2021-11-23 02:38:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 02:38:06,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:06,455 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:06,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:38:06,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 756903943, now seen corresponding path program 1 times [2021-11-23 02:38:06,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:06,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032815719] [2021-11-23 02:38:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:06,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 02:38:06,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:06,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032815719] [2021-11-23 02:38:06,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032815719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:06,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:06,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:38:06,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031513977] [2021-11-23 02:38:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:06,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:06,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:06,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:38:06,570 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) [2021-11-23 02:38:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:06,738 INFO L93 Difference]: Finished difference Result 1530 states and 2419 transitions. [2021-11-23 02:38:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:38:06,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-11-23 02:38:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:06,746 INFO L225 Difference]: With dead ends: 1530 [2021-11-23 02:38:06,746 INFO L226 Difference]: Without dead ends: 790 [2021-11-23 02:38:06,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:38:06,755 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1062 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 [2021-11-23 02:38:06,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:38:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-23 02:38:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 756. [2021-11-23 02:38:06,835 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) [2021-11-23 02:38:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1179 transitions. [2021-11-23 02:38:06,849 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1179 transitions. Word has length 108 [2021-11-23 02:38:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:06,850 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1179 transitions. [2021-11-23 02:38:06,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:38:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1179 transitions. [2021-11-23 02:38:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:38:06,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:06,856 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:06,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:38:06,856 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2136138177, now seen corresponding path program 1 times [2021-11-23 02:38:06,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:06,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635853084] [2021-11-23 02:38:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:06,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:38:06,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635853084] [2021-11-23 02:38:06,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635853084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941744984] [2021-11-23 02:38:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:06,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:06,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:07,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:38:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:38:07,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:38:07,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:38:07,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941744984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:07,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:38:07,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:38:07,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553442207] [2021-11-23 02:38:07,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:07,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:07,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:38:07,612 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) [2021-11-23 02:38:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:07,912 INFO L93 Difference]: Finished difference Result 1578 states and 2508 transitions. [2021-11-23 02:38:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:38:07,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2021-11-23 02:38:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:07,921 INFO L225 Difference]: With dead ends: 1578 [2021-11-23 02:38:07,921 INFO L226 Difference]: Without dead ends: 834 [2021-11-23 02:38:07,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:38:07,937 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 918 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:07,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:38:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-23 02:38:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-11-23 02:38:07,986 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) [2021-11-23 02:38:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1325 transitions. [2021-11-23 02:38:08,001 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1325 transitions. Word has length 111 [2021-11-23 02:38:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:08,003 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1325 transitions. [2021-11-23 02:38:08,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:38:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1325 transitions. [2021-11-23 02:38:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 02:38:08,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:08,010 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:08,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:08,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:08,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2099866642, now seen corresponding path program 1 times [2021-11-23 02:38:08,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:08,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733761693] [2021-11-23 02:38:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:08,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 02:38:08,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733761693] [2021-11-23 02:38:08,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733761693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462144658] [2021-11-23 02:38:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:08,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:08,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:08,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:38:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:08,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:38:08,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:38:08,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:38:08,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462144658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:08,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:38:08,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:38:08,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944837357] [2021-11-23 02:38:08,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:08,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:08,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:08,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:08,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:38:08,857 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) [2021-11-23 02:38:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:09,135 INFO L93 Difference]: Finished difference Result 1734 states and 2798 transitions. [2021-11-23 02:38:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:38:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2021-11-23 02:38:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:09,148 INFO L225 Difference]: With dead ends: 1734 [2021-11-23 02:38:09,148 INFO L226 Difference]: Without dead ends: 912 [2021-11-23 02:38:09,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:38:09,159 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 918 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:09,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:38:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-11-23 02:38:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2021-11-23 02:38:09,202 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) [2021-11-23 02:38:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1471 transitions. [2021-11-23 02:38:09,213 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1471 transitions. Word has length 116 [2021-11-23 02:38:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:09,215 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1471 transitions. [2021-11-23 02:38:09,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:38:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1471 transitions. [2021-11-23 02:38:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 02:38:09,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:09,220 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:09,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:09,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:09,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -438632994, now seen corresponding path program 1 times [2021-11-23 02:38:09,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:09,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793959613] [2021-11-23 02:38:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:09,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 02:38:09,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793959613] [2021-11-23 02:38:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793959613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244958230] [2021-11-23 02:38:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:09,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:09,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:09,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:38:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:09,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:38:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:38:09,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:38:09,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244958230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:09,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:38:09,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:38:09,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190607562] [2021-11-23 02:38:09,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:09,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:38:09,999 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) [2021-11-23 02:38:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:10,284 INFO L93 Difference]: Finished difference Result 1890 states and 3088 transitions. [2021-11-23 02:38:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:38:10,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2021-11-23 02:38:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:10,293 INFO L225 Difference]: With dead ends: 1890 [2021-11-23 02:38:10,294 INFO L226 Difference]: Without dead ends: 990 [2021-11-23 02:38:10,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:38:10,302 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 918 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 [2021-11-23 02:38:10,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:38:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-11-23 02:38:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2021-11-23 02:38:10,354 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) [2021-11-23 02:38:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1617 transitions. [2021-11-23 02:38:10,364 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1617 transitions. Word has length 120 [2021-11-23 02:38:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:10,365 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1617 transitions. [2021-11-23 02:38:10,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:38:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1617 transitions. [2021-11-23 02:38:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 02:38:10,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:10,372 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:10,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:10,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:10,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 549834207, now seen corresponding path program 1 times [2021-11-23 02:38:10,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:10,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870450508] [2021-11-23 02:38:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:10,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-23 02:38:10,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:10,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870450508] [2021-11-23 02:38:10,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870450508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:10,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510189600] [2021-11-23 02:38:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:10,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:10,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:10,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:10,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:38:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:10,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:38:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:38:11,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:38:11,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510189600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:11,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:38:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:38:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990127436] [2021-11-23 02:38:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:38:11,252 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) [2021-11-23 02:38:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:11,545 INFO L93 Difference]: Finished difference Result 2046 states and 3378 transitions. [2021-11-23 02:38:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:38:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2021-11-23 02:38:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:11,555 INFO L225 Difference]: With dead ends: 2046 [2021-11-23 02:38:11,556 INFO L226 Difference]: Without dead ends: 1068 [2021-11-23 02:38:11,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:38:11,564 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 918 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 [2021-11-23 02:38:11,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:38:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-23 02:38:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2021-11-23 02:38:11,610 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) [2021-11-23 02:38:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1763 transitions. [2021-11-23 02:38:11,620 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1763 transitions. Word has length 123 [2021-11-23 02:38:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:11,621 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1763 transitions. [2021-11-23 02:38:11,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:38:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1763 transitions. [2021-11-23 02:38:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:38:11,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:11,628 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:38:11,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:11,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:11,854 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2146047567, now seen corresponding path program 1 times [2021-11-23 02:38:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:11,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940754969] [2021-11-23 02:38:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:11,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-23 02:38:11,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940754969] [2021-11-23 02:38:11,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940754969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:11,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:11,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:38:11,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840858064] [2021-11-23 02:38:11,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:11,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:11,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:38:11,976 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) [2021-11-23 02:38:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:12,262 INFO L93 Difference]: Finished difference Result 2208 states and 3666 transitions. [2021-11-23 02:38:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:38:12,262 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 [2021-11-23 02:38:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:12,272 INFO L225 Difference]: With dead ends: 2208 [2021-11-23 02:38:12,272 INFO L226 Difference]: Without dead ends: 1136 [2021-11-23 02:38:12,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:38:12,280 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 99 mSDsluCounter, 918 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:12,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:38:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-23 02:38:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2021-11-23 02:38:12,325 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) [2021-11-23 02:38:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1799 transitions. [2021-11-23 02:38:12,334 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1799 transitions. Word has length 125 [2021-11-23 02:38:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:12,334 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1799 transitions. [2021-11-23 02:38:12,334 INFO L471 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) [2021-11-23 02:38:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1799 transitions. [2021-11-23 02:38:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:38:12,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:12,340 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:38:12,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:38:12,340 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash 623391102, now seen corresponding path program 1 times [2021-11-23 02:38:12,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:12,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62623499] [2021-11-23 02:38:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:12,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-23 02:38:12,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62623499] [2021-11-23 02:38:12,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62623499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:12,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:12,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:38:12,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628080583] [2021-11-23 02:38:12,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:12,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:38:12,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:38:12,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:38:12,477 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) [2021-11-23 02:38:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:13,030 INFO L93 Difference]: Finished difference Result 2331 states and 3678 transitions. [2021-11-23 02:38:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:38:13,031 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 [2021-11-23 02:38:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:13,040 INFO L225 Difference]: With dead ends: 2331 [2021-11-23 02:38:13,040 INFO L226 Difference]: Without dead ends: 1024 [2021-11-23 02:38:13,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:38:13,050 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 659 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:13,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 2601 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:38:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-23 02:38:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1002. [2021-11-23 02:38:13,097 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) [2021-11-23 02:38:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1517 transitions. [2021-11-23 02:38:13,105 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1517 transitions. Word has length 125 [2021-11-23 02:38:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:13,105 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1517 transitions. [2021-11-23 02:38:13,105 INFO L471 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) [2021-11-23 02:38:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1517 transitions. [2021-11-23 02:38:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 02:38:13,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:13,110 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:38:13,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:38:13,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1665311154, now seen corresponding path program 1 times [2021-11-23 02:38:13,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:13,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169645967] [2021-11-23 02:38:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:13,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-23 02:38:13,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:13,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169645967] [2021-11-23 02:38:13,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169645967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:13,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533611734] [2021-11-23 02:38:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:13,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:13,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:13,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:13,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:38:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 02:38:13,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 02:38:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:38:59,458 WARN L227 SmtUtils]: Spent 41.12s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 02:39:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 02:39:02,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533611734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:39:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344783930] [2021-11-23 02:39:02,422 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2021-11-23 02:39:02,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:39:02,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:39:02,434 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:39:02,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:39:05,201 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-23 02:39:08,753 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-23 02:39:09,537 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 564 for LOIs [2021-11-23 02:39:30,963 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 60 for LOIs [2021-11-23 02:39:30,971 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 57 for LOIs [2021-11-23 02:39:31,053 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 97 for LOIs [2021-11-23 02:39:31,445 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 433 for LOIs [2021-11-23 02:39:32,194 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 491 for LOIs [2021-11-23 02:39:32,369 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-23 02:39:32,509 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 104 for LOIs [2021-11-23 02:39:32,538 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:39:49,866 WARN L227 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:39:55,618 WARN L227 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:41:06,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34062#(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) (<= ~currentFloorID~0 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= ~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 ~currentFloorID~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) (<= 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) (= |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 [2021-11-23 02:41:06,729 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:41:06,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:41:06,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 43 [2021-11-23 02:41:06,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968334727] [2021-11-23 02:41:06,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:41:06,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 02:41:06,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 02:41:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=9363, Unknown=0, NotChecked=0, Total=10302 [2021-11-23 02:41:06,736 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) [2021-11-23 02:41:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:22,409 INFO L93 Difference]: Finished difference Result 3199 states and 4926 transitions. [2021-11-23 02:41:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-23 02:41:22,410 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 [2021-11-23 02:41:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:22,426 INFO L225 Difference]: With dead ends: 3199 [2021-11-23 02:41:22,427 INFO L226 Difference]: Without dead ends: 1772 [2021-11-23 02:41:22,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 298 SyntacticMatches, 20 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11476 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=2524, Invalid=25532, Unknown=0, NotChecked=0, Total=28056 [2021-11-23 02:41:22,451 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 6263 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 18662 mSolverCounterSat, 3964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6311 SdHoareTripleChecker+Valid, 5029 SdHoareTripleChecker+Invalid, 22626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3964 IncrementalHoareTripleChecker+Valid, 18662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:22,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6311 Valid, 5029 Invalid, 22626 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3964 Valid, 18662 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2021-11-23 02:41:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-11-23 02:41:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1647. [2021-11-23 02:41:22,589 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) [2021-11-23 02:41:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2396 transitions. [2021-11-23 02:41:22,608 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2396 transitions. Word has length 126 [2021-11-23 02:41:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:22,608 INFO L470 AbstractCegarLoop]: Abstraction has 1647 states and 2396 transitions. [2021-11-23 02:41:22,609 INFO L471 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) [2021-11-23 02:41:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2396 transitions. [2021-11-23 02:41:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 02:41:22,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:22,617 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:41:22,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:22,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:22,838 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1729776230, now seen corresponding path program 1 times [2021-11-23 02:41:22,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:22,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342954383] [2021-11-23 02:41:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:22,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 02:41:22,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342954383] [2021-11-23 02:41:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342954383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54624150] [2021-11-23 02:41:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:22,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:22,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:22,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:41:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:41:23,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-23 02:41:23,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:23,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54624150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:23,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:23,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-23 02:41:23,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720357256] [2021-11-23 02:41:23,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:23,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:41:23,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:41:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:41:23,552 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) [2021-11-23 02:41:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:24,321 INFO L93 Difference]: Finished difference Result 3114 states and 4525 transitions. [2021-11-23 02:41:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:41:24,321 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 [2021-11-23 02:41:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:24,333 INFO L225 Difference]: With dead ends: 3114 [2021-11-23 02:41:24,334 INFO L226 Difference]: Without dead ends: 1480 [2021-11-23 02:41:24,344 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:41:24,345 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 333 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:24,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 2225 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:41:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-23 02:41:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1456. [2021-11-23 02:41:24,440 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) [2021-11-23 02:41:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2109 transitions. [2021-11-23 02:41:24,455 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2109 transitions. Word has length 131 [2021-11-23 02:41:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:24,455 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 2109 transitions. [2021-11-23 02:41:24,455 INFO L471 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) [2021-11-23 02:41:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2109 transitions. [2021-11-23 02:41:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-23 02:41:24,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:24,468 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:24,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:24,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:24,694 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 357893546, now seen corresponding path program 1 times [2021-11-23 02:41:24,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:24,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809284685] [2021-11-23 02:41:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:24,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:41:24,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809284685] [2021-11-23 02:41:24,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809284685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477843797] [2021-11-23 02:41:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:24,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:24,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:41:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:25,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:41:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-23 02:41:25,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 02:41:26,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477843797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:41:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574701223] [2021-11-23 02:41:26,110 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2021-11-23 02:41:26,111 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:41:26,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:41:26,112 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:41:26,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:41:31,204 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-23 02:41:39,238 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 47 for LOIs [2021-11-23 02:41:39,321 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2021-11-23 02:41:39,430 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 82 for LOIs [2021-11-23 02:41:39,986 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 25 for LOIs [2021-11-23 02:41:40,045 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 27 for LOIs [2021-11-23 02:41:40,055 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 70 for LOIs [2021-11-23 02:41:40,071 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-23 02:41:40,074 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-23 02:41:43,466 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-23 02:41:44,010 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 57 for LOIs [2021-11-23 02:41:44,061 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2021-11-23 02:41:44,065 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-23 02:41:44,205 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:01,127 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:42:06,927 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:42:24,136 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:42:48,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48611#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 |#NULL.base|) (= |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 ~head~0.offset) (<= 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) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 12 ~cleanupTimeShifts~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|)) (<= |#NULL.base| 0) (= |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|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)))' at error location [2021-11-23 02:42:48,414 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:48,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:42:48,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-11-23 02:42:48,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551731143] [2021-11-23 02:42:48,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:48,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:42:48,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:42:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1072, Invalid=13690, Unknown=0, NotChecked=0, Total=14762 [2021-11-23 02:42:48,420 INFO L87 Difference]: Start difference. First operand 1456 states and 2109 transitions. Second operand has 26 states, 20 states have (on average 10.35) internal successors, (207), 22 states have internal predecessors, (207), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2021-11-23 02:43:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:02,465 INFO L93 Difference]: Finished difference Result 5397 states and 8118 transitions. [2021-11-23 02:43:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 02:43:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.35) internal successors, (207), 22 states have internal predecessors, (207), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 188 [2021-11-23 02:43:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:02,500 INFO L225 Difference]: With dead ends: 5397 [2021-11-23 02:43:02,500 INFO L226 Difference]: Without dead ends: 3954 [2021-11-23 02:43:02,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 492 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13047 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=2287, Invalid=30655, Unknown=0, NotChecked=0, Total=32942 [2021-11-23 02:43:02,526 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 5602 mSDsluCounter, 5901 mSDsCounter, 0 mSdLazyCounter, 19981 mSolverCounterSat, 4240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5624 SdHoareTripleChecker+Valid, 6341 SdHoareTripleChecker+Invalid, 24221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4240 IncrementalHoareTripleChecker+Valid, 19981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:02,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5624 Valid, 6341 Invalid, 24221 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4240 Valid, 19981 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2021-11-23 02:43:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-11-23 02:43:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3614. [2021-11-23 02:43:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3614 states, 2626 states have (on average 1.4120335110434121) internal successors, (3708), 2706 states have internal predecessors, (3708), 694 states have call successors, (694), 302 states have call predecessors, (694), 293 states have return successors, (805), 665 states have call predecessors, (805), 686 states have call successors, (805) [2021-11-23 02:43:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3614 states to 3614 states and 5207 transitions. [2021-11-23 02:43:02,847 INFO L78 Accepts]: Start accepts. Automaton has 3614 states and 5207 transitions. Word has length 188 [2021-11-23 02:43:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:02,848 INFO L470 AbstractCegarLoop]: Abstraction has 3614 states and 5207 transitions. [2021-11-23 02:43:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.35) internal successors, (207), 22 states have internal predecessors, (207), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2021-11-23 02:43:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3614 states and 5207 transitions. [2021-11-23 02:43:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-23 02:43:02,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:02,883 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:02,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:03,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:43:03,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -112349873, now seen corresponding path program 1 times [2021-11-23 02:43:03,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500637116] [2021-11-23 02:43:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:03,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-23 02:43:03,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:03,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500637116] [2021-11-23 02:43:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500637116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:43:03,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627137089] [2021-11-23 02:43:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:03,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:03,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:43:03,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:43:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:43:03,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:43:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 98 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-23 02:43:04,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:43:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-23 02:43:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627137089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:43:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895584443] [2021-11-23 02:43:04,725 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2021-11-23 02:43:04,725 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:43:04,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:43:04,726 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:43:04,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:43:10,399 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-23 02:43:19,432 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 47 for LOIs [2021-11-23 02:43:19,515 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2021-11-23 02:43:19,623 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-23 02:43:20,133 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 20 for LOIs [2021-11-23 02:43:20,181 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 27 for LOIs [2021-11-23 02:43:20,191 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 85 for LOIs [2021-11-23 02:43:20,207 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-23 02:43:20,230 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-23 02:43:23,622 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-23 02:43:24,141 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 57 for LOIs [2021-11-23 02:43:24,205 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2021-11-23 02:43:24,209 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-23 02:43:24,381 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:43:41,216 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:43:46,971 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:44:04,404 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:44:33,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62790#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 ~head~0.offset) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= ~currentFloorID~0 2147483647) (<= 4 ~executiveFloor~0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 12 ~cleanupTimeShifts~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|)) (<= |#NULL.base| 0) (= |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|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)))' at error location [2021-11-23 02:44:33,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:44:33,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:44:33,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-23 02:44:33,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958312842] [2021-11-23 02:44:33,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:44:33,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:44:33,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:33,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:44:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=12202, Unknown=0, NotChecked=0, Total=13340 [2021-11-23 02:44:33,173 INFO L87 Difference]: Start difference. First operand 3614 states and 5207 transitions. Second operand has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2021-11-23 02:44:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:38,385 INFO L93 Difference]: Finished difference Result 7212 states and 10465 transitions. [2021-11-23 02:44:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:44:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 246 [2021-11-23 02:44:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:38,425 INFO L225 Difference]: With dead ends: 7212 [2021-11-23 02:44:38,425 INFO L226 Difference]: Without dead ends: 4618 [2021-11-23 02:44:38,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 639 SyntacticMatches, 8 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6705 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=1479, Invalid=17153, Unknown=0, NotChecked=0, Total=18632 [2021-11-23 02:44:38,443 INFO L933 BasicCegarLoop]: 998 mSDtfsCounter, 3087 mSDsluCounter, 10375 mSDsCounter, 0 mSdLazyCounter, 6602 mSolverCounterSat, 2127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3108 SdHoareTripleChecker+Valid, 10590 SdHoareTripleChecker+Invalid, 8729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2127 IncrementalHoareTripleChecker+Valid, 6602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:38,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3108 Valid, 10590 Invalid, 8729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2127 Valid, 6602 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 02:44:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4618 states. [2021-11-23 02:44:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4618 to 4502. [2021-11-23 02:44:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 3271 states have (on average 1.3946805258330786) internal successors, (4562), 3354 states have internal predecessors, (4562), 849 states have call successors, (849), 392 states have call predecessors, (849), 381 states have return successors, (1044), 815 states have call predecessors, (1044), 839 states have call successors, (1044) [2021-11-23 02:44:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 6455 transitions. [2021-11-23 02:44:38,782 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 6455 transitions. Word has length 246 [2021-11-23 02:44:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:38,783 INFO L470 AbstractCegarLoop]: Abstraction has 4502 states and 6455 transitions. [2021-11-23 02:44:38,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2021-11-23 02:44:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 6455 transitions. [2021-11-23 02:44:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 02:44:38,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:38,828 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:38,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:39,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:44:39,042 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:39,043 INFO L85 PathProgramCache]: Analyzing trace with hash -685906669, now seen corresponding path program 1 times [2021-11-23 02:44:39,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:39,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923035010] [2021-11-23 02:44:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:39,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-23 02:44:39,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923035010] [2021-11-23 02:44:39,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923035010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:39,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:39,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:39,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015270980] [2021-11-23 02:44:39,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:39,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:39,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:39,194 INFO L87 Difference]: Start difference. First operand 4502 states and 6455 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:44:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:39,563 INFO L93 Difference]: Finished difference Result 8014 states and 11535 transitions. [2021-11-23 02:44:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 258 [2021-11-23 02:44:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:39,598 INFO L225 Difference]: With dead ends: 8014 [2021-11-23 02:44:39,598 INFO L226 Difference]: Without dead ends: 4600 [2021-11-23 02:44:39,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:39,614 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 344 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:39,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 995 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:44:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-11-23 02:44:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4578. [2021-11-23 02:44:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 3321 states have (on average 1.37548931044866) internal successors, (4568), 3404 states have internal predecessors, (4568), 863 states have call successors, (863), 404 states have call predecessors, (863), 393 states have return successors, (1056), 829 states have call predecessors, (1056), 853 states have call successors, (1056) [2021-11-23 02:44:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 6487 transitions. [2021-11-23 02:44:39,905 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 6487 transitions. Word has length 258 [2021-11-23 02:44:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:39,907 INFO L470 AbstractCegarLoop]: Abstraction has 4578 states and 6487 transitions. [2021-11-23 02:44:39,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:44:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 6487 transitions. [2021-11-23 02:44:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-23 02:44:39,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:39,971 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:44:39,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:44:39,971 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1966252806, now seen corresponding path program 1 times [2021-11-23 02:44:39,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:39,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453156964] [2021-11-23 02:44:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:39,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2021-11-23 02:44:40,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:40,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453156964] [2021-11-23 02:44:40,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453156964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:40,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834890462] [2021-11-23 02:44:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:40,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:40,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:40,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:44:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:44:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 119 proven. 44 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-23 02:44:41,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:44:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2021-11-23 02:44:41,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834890462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:44:41,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588451437] [2021-11-23 02:44:41,871 INFO L159 IcfgInterpreter]: Started Sifa with 128 locations of interest [2021-11-23 02:44:41,871 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:44:41,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:44:41,875 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:44:41,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:44:49,258 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 550 for LOIs [2021-11-23 02:44:49,700 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2021-11-23 02:44:51,103 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2021-11-23 02:44:51,237 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 37 for LOIs [2021-11-23 02:44:51,288 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 37 for LOIs [2021-11-23 02:44:51,421 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 45 for LOIs [2021-11-23 02:44:51,523 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2021-11-23 02:44:51,531 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 51 for LOIs [2021-11-23 02:44:51,544 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 37 for LOIs [2021-11-23 02:44:51,549 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-23 02:44:54,866 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 49 for LOIs [2021-11-23 02:44:54,943 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 45 for LOIs [2021-11-23 02:44:54,948 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 506 for LOIs [2021-11-23 02:44:57,199 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 770 for LOIs [2021-11-23 02:45:01,150 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 623 for LOIs [2021-11-23 02:45:01,524 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:45:15,783 WARN L227 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 623 DAG size of output: 504 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:45:24,467 WARN L227 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 663 DAG size of output: 518 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:45:30,276 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:45:36,088 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:45:50,617 WARN L227 SmtUtils]: Spent 13.24s on a formula simplification. DAG size of input: 770 DAG size of output: 638 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:45:57,159 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 773 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:46:48,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '99174#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= ~currentFloorID~0 2147483647) (= ~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|)) (= |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 (+ 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|) (= |#NULL.offset| 0) (<= |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 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2021-11-23 02:46:48,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:46:48,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:46:48,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2021-11-23 02:46:48,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874017289] [2021-11-23 02:46:48,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:46:48,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:46:48,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:48,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:46:48,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1024, Invalid=13018, Unknown=0, NotChecked=0, Total=14042 [2021-11-23 02:46:48,664 INFO L87 Difference]: Start difference. First operand 4578 states and 6487 transitions. Second operand has 21 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 8 states have call successors, (79), 5 states have call predecessors, (79), 8 states have return successors, (74), 9 states have call predecessors, (74), 8 states have call successors, (74) [2021-11-23 02:46:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:53,944 INFO L93 Difference]: Finished difference Result 9536 states and 13719 transitions. [2021-11-23 02:46:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 02:46:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 8 states have call successors, (79), 5 states have call predecessors, (79), 8 states have return successors, (74), 9 states have call predecessors, (74), 8 states have call successors, (74) Word has length 325 [2021-11-23 02:46:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:53,987 INFO L225 Difference]: With dead ends: 9536 [2021-11-23 02:46:53,987 INFO L226 Difference]: Without dead ends: 5240 [2021-11-23 02:46:54,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 845 SyntacticMatches, 36 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9209 ImplicationChecksByTransitivity, 109.0s TimeCoverageRelationStatistics Valid=1447, Invalid=21809, Unknown=0, NotChecked=0, Total=23256 [2021-11-23 02:46:54,012 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 2267 mSDsluCounter, 8751 mSDsCounter, 0 mSdLazyCounter, 5056 mSolverCounterSat, 1489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2283 SdHoareTripleChecker+Valid, 8956 SdHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1489 IncrementalHoareTripleChecker+Valid, 5056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:54,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2283 Valid, 8956 Invalid, 6545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1489 Valid, 5056 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:46:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5240 states. [2021-11-23 02:46:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5240 to 5098. [2021-11-23 02:46:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 3703 states have (on average 1.354577369700243) internal successors, (5016), 3811 states have internal predecessors, (5016), 920 states have call successors, (920), 440 states have call predecessors, (920), 474 states have return successors, (1256), 906 states have call predecessors, (1256), 910 states have call successors, (1256) [2021-11-23 02:46:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 7192 transitions. [2021-11-23 02:46:54,363 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 7192 transitions. Word has length 325 [2021-11-23 02:46:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:54,363 INFO L470 AbstractCegarLoop]: Abstraction has 5098 states and 7192 transitions. [2021-11-23 02:46:54,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 8 states have call successors, (79), 5 states have call predecessors, (79), 8 states have return successors, (74), 9 states have call predecessors, (74), 8 states have call successors, (74) [2021-11-23 02:46:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 7192 transitions. [2021-11-23 02:46:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-23 02:46:54,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:54,404 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:54,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:54,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:46:54,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:54,619 INFO L85 PathProgramCache]: Analyzing trace with hash 31945512, now seen corresponding path program 1 times [2021-11-23 02:46:54,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:54,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317054896] [2021-11-23 02:46:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:54,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2021-11-23 02:46:54,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317054896] [2021-11-23 02:46:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317054896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411216023] [2021-11-23 02:46:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:54,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:54,839 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:54,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:46:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:46:55,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2021-11-23 02:46:55,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:46:55,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411216023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:55,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:46:55,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-23 02:46:55,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687804623] [2021-11-23 02:46:55,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:55,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:55,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:55,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:55,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:46:55,759 INFO L87 Difference]: Start difference. First operand 5098 states and 7192 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:46:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:56,065 INFO L93 Difference]: Finished difference Result 8525 states and 12076 transitions. [2021-11-23 02:46:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 358 [2021-11-23 02:46:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:56,101 INFO L225 Difference]: With dead ends: 8525 [2021-11-23 02:46:56,101 INFO L226 Difference]: Without dead ends: 5150 [2021-11-23 02:46:56,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:46:56,115 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 394 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:56,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 979 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:46:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-11-23 02:46:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 5128. [2021-11-23 02:46:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 3711 states have (on average 1.340878469415252) internal successors, (4976), 3823 states have internal predecessors, (4976), 928 states have call successors, (928), 452 states have call predecessors, (928), 488 states have return successors, (1243), 912 states have call predecessors, (1243), 918 states have call successors, (1243) [2021-11-23 02:46:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 7147 transitions. [2021-11-23 02:46:56,444 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 7147 transitions. Word has length 358 [2021-11-23 02:46:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:56,446 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 7147 transitions. [2021-11-23 02:46:56,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:46:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 7147 transitions. [2021-11-23 02:46:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-23 02:46:56,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:56,476 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:56,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:56,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:56,690 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:56,690 INFO L85 PathProgramCache]: Analyzing trace with hash 550947024, now seen corresponding path program 1 times [2021-11-23 02:46:56,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:56,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897676661] [2021-11-23 02:46:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:56,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-23 02:46:56,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897676661] [2021-11-23 02:46:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897676661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172951419] [2021-11-23 02:46:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:56,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:56,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:56,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:46:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:46:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-23 02:46:57,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-23 02:46:58,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172951419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:46:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23510227] [2021-11-23 02:46:58,368 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2021-11-23 02:46:58,368 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:46:58,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:46:58,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:46:58,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:47:03,332 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-23 02:47:09,983 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 47 for LOIs [2021-11-23 02:47:10,065 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2021-11-23 02:47:10,145 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 77 for LOIs [2021-11-23 02:47:10,297 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 20 for LOIs [2021-11-23 02:47:10,345 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 27 for LOIs [2021-11-23 02:47:10,356 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 70 for LOIs [2021-11-23 02:47:10,372 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-23 02:47:10,375 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-23 02:47:13,567 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-23 02:47:14,089 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 57 for LOIs [2021-11-23 02:47:14,160 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2021-11-23 02:47:14,163 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-23 02:47:14,302 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:47:31,225 WARN L227 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:47:37,009 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:47:54,787 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:48:17,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141967#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 ~head~0.offset) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= ~currentFloorID~0 2147483647) (<= 4 ~executiveFloor~0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 12 ~cleanupTimeShifts~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|)) (<= |#NULL.base| 0) (= |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|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)))' at error location [2021-11-23 02:48:17,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:48:17,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:48:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-23 02:48:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576506760] [2021-11-23 02:48:17,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:48:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:48:17,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:48:17,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=11153, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 02:48:17,359 INFO L87 Difference]: Start difference. First operand 5128 states and 7147 transitions. Second operand has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2021-11-23 02:48:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:20,497 INFO L93 Difference]: Finished difference Result 7531 states and 10473 transitions. [2021-11-23 02:48:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:48:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) Word has length 251 [2021-11-23 02:48:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:20,521 INFO L225 Difference]: With dead ends: 7531 [2021-11-23 02:48:20,521 INFO L226 Difference]: Without dead ends: 5214 [2021-11-23 02:48:20,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 659 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5017 ImplicationChecksByTransitivity, 63.8s TimeCoverageRelationStatistics Valid=1028, Invalid=14224, Unknown=0, NotChecked=0, Total=15252 [2021-11-23 02:48:20,534 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 1890 mSDsluCounter, 5776 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 6188 SdHoareTripleChecker+Invalid, 4850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:20,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1909 Valid, 6188 Invalid, 4850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:48:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-11-23 02:48:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5107. [2021-11-23 02:48:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5107 states, 3690 states have (on average 1.3390243902439025) internal successors, (4941), 3802 states have internal predecessors, (4941), 928 states have call successors, (928), 452 states have call predecessors, (928), 488 states have return successors, (1243), 912 states have call predecessors, (1243), 918 states have call successors, (1243) [2021-11-23 02:48:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 7112 transitions. [2021-11-23 02:48:20,863 INFO L78 Accepts]: Start accepts. Automaton has 5107 states and 7112 transitions. Word has length 251 [2021-11-23 02:48:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 5107 states and 7112 transitions. [2021-11-23 02:48:20,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2021-11-23 02:48:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5107 states and 7112 transitions. [2021-11-23 02:48:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-23 02:48:20,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:20,899 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:20,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:21,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:48:21,114 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 52337080, now seen corresponding path program 1 times [2021-11-23 02:48:21,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:21,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829405294] [2021-11-23 02:48:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:21,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-23 02:48:21,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829405294] [2021-11-23 02:48:21,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829405294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:21,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:21,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:21,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370878993] [2021-11-23 02:48:21,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:21,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:21,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:21,228 INFO L87 Difference]: Start difference. First operand 5107 states and 7112 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-23 02:48:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:21,723 INFO L93 Difference]: Finished difference Result 10906 states and 15682 transitions. [2021-11-23 02:48:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:48:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 268 [2021-11-23 02:48:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:21,757 INFO L225 Difference]: With dead ends: 10906 [2021-11-23 02:48:21,757 INFO L226 Difference]: Without dead ends: 5191 [2021-11-23 02:48:21,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:48:21,788 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 412 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:21,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1691 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:48:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-11-23 02:48:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 5121. [2021-11-23 02:48:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 3697 states have (on average 1.2978090343521775) internal successors, (4798), 3816 states have internal predecessors, (4798), 928 states have call successors, (928), 452 states have call predecessors, (928), 495 states have return successors, (1253), 912 states have call predecessors, (1253), 918 states have call successors, (1253) [2021-11-23 02:48:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 6979 transitions. [2021-11-23 02:48:22,120 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 6979 transitions. Word has length 268 [2021-11-23 02:48:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:22,121 INFO L470 AbstractCegarLoop]: Abstraction has 5121 states and 6979 transitions. [2021-11-23 02:48:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-23 02:48:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 6979 transitions. [2021-11-23 02:48:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-23 02:48:22,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:22,150 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:22,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:48:22,150 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1865682835, now seen corresponding path program 1 times [2021-11-23 02:48:22,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245929482] [2021-11-23 02:48:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:22,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-23 02:48:22,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:22,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245929482] [2021-11-23 02:48:22,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245929482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:48:22,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27409155] [2021-11-23 02:48:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:22,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:22,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:22,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:48:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:48:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-23 02:48:23,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:48:23,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27409155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:23,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:48:23,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-23 02:48:23,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596990248] [2021-11-23 02:48:23,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:23,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:23,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:48:23,307 INFO L87 Difference]: Start difference. First operand 5121 states and 6979 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:48:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:23,826 INFO L93 Difference]: Finished difference Result 7798 states and 10635 transitions. [2021-11-23 02:48:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 363 [2021-11-23 02:48:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:23,852 INFO L225 Difference]: With dead ends: 7798 [2021-11-23 02:48:23,852 INFO L226 Difference]: Without dead ends: 5143 [2021-11-23 02:48:23,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:48:23,865 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 358 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:23,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 976 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:48:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5143 states. [2021-11-23 02:48:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5143 to 5121. [2021-11-23 02:48:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 3697 states have (on average 1.2891533675953475) internal successors, (4766), 3816 states have internal predecessors, (4766), 928 states have call successors, (928), 452 states have call predecessors, (928), 495 states have return successors, (1245), 912 states have call predecessors, (1245), 918 states have call successors, (1245) [2021-11-23 02:48:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 6939 transitions. [2021-11-23 02:48:24,199 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 6939 transitions. Word has length 363 [2021-11-23 02:48:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:24,200 INFO L470 AbstractCegarLoop]: Abstraction has 5121 states and 6939 transitions. [2021-11-23 02:48:24,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:48:24,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 6939 transitions. [2021-11-23 02:48:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-23 02:48:24,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:24,224 INFO L514 BasicCegarLoop]: trace histogram [20, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:24,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:24,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:24,450 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1447700990, now seen corresponding path program 1 times [2021-11-23 02:48:24,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125410441] [2021-11-23 02:48:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:24,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2021-11-23 02:48:24,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125410441] [2021-11-23 02:48:24,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125410441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:48:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973782060] [2021-11-23 02:48:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:24,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:24,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:24,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:48:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:48:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-23 02:48:25,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:48:25,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973782060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:25,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:48:25,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-23 02:48:25,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272201694] [2021-11-23 02:48:25,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:25,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:25,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:25,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:48:25,695 INFO L87 Difference]: Start difference. First operand 5121 states and 6939 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2021-11-23 02:48:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:26,123 INFO L93 Difference]: Finished difference Result 11022 states and 15162 transitions. [2021-11-23 02:48:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:48:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) Word has length 384 [2021-11-23 02:48:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:26,153 INFO L225 Difference]: With dead ends: 11022 [2021-11-23 02:48:26,153 INFO L226 Difference]: Without dead ends: 5191 [2021-11-23 02:48:26,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:48:26,179 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 402 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:26,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1695 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:48:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-11-23 02:48:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 5121. [2021-11-23 02:48:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 3697 states have (on average 1.255612658912632) internal successors, (4642), 3816 states have internal predecessors, (4642), 928 states have call successors, (928), 452 states have call predecessors, (928), 495 states have return successors, (1245), 912 states have call predecessors, (1245), 918 states have call successors, (1245) [2021-11-23 02:48:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 6815 transitions. [2021-11-23 02:48:26,523 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 6815 transitions. Word has length 384 [2021-11-23 02:48:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:26,524 INFO L470 AbstractCegarLoop]: Abstraction has 5121 states and 6815 transitions. [2021-11-23 02:48:26,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2021-11-23 02:48:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 6815 transitions. [2021-11-23 02:48:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-23 02:48:26,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:26,550 INFO L514 BasicCegarLoop]: trace histogram [20, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:26,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 02:48:26,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:26,766 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1573713295, now seen corresponding path program 1 times [2021-11-23 02:48:26,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:26,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170348844] [2021-11-23 02:48:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:26,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2021-11-23 02:48:26,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:26,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170348844] [2021-11-23 02:48:26,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170348844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:48:26,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803117698] [2021-11-23 02:48:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:26,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:26,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:26,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:27,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb41cc7-c25d-4883-95f4-d1286878cf6c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:48:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:48:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 147 proven. 54 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2021-11-23 02:48:28,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 881 trivial. 0 not checked. [2021-11-23 02:48:29,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803117698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:29,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174463618] [2021-11-23 02:48:29,038 INFO L159 IcfgInterpreter]: Started Sifa with 163 locations of interest [2021-11-23 02:48:29,038 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:48:29,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:48:29,039 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:48:29,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:48:36,127 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 550 for LOIs [2021-11-23 02:48:36,534 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2021-11-23 02:48:38,691 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 23 for LOIs [2021-11-23 02:48:39,283 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 48 for LOIs [2021-11-23 02:48:39,346 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 87 for LOIs [2021-11-23 02:48:39,524 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 40 for LOIs [2021-11-23 02:48:39,645 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2021-11-23 02:48:39,655 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 63 for LOIs [2021-11-23 02:48:39,676 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2021-11-23 02:48:39,685 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-23 02:48:43,122 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 25 for LOIs [2021-11-23 02:48:43,165 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 27 for LOIs [2021-11-23 02:48:43,168 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 29 for LOIs [2021-11-23 02:48:43,172 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 506 for LOIs [2021-11-23 02:48:45,445 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 770 for LOIs [2021-11-23 02:48:49,308 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 623 for LOIs [2021-11-23 02:48:49,697 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:49:04,377 WARN L227 SmtUtils]: Spent 7.67s on a formula simplification. DAG size of input: 623 DAG size of output: 504 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:13,259 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 663 DAG size of output: 518 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:19,144 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:25,045 WARN L227 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)