./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba --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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:00:39,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:00:39,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:00:39,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:00:39,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:00:39,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:00:39,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:00:39,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:00:39,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:00:39,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:00:39,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:00:39,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:00:39,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:00:39,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:00:39,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:00:39,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:00:39,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:00:39,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:00:39,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:00:39,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:00:39,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:00:39,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:00:39,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:00:39,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:00:39,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:00:39,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:00:39,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:00:39,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:00:39,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:00:39,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:00:39,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:00:39,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:00:39,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:00:39,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:00:39,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:00:39,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:00:39,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:00:39,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:00:39,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:00:39,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:00:39,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:00:39,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:00:39,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:00:39,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:00:39,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:00:39,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:00:39,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:00:39,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:00:39,408 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:00:39,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:00:39,408 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:00:39,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:00:39,410 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:00:39,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:00:39,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:00:39,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:00:39,410 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:00:39,411 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:00:39,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:00:39,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:00:39,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:00:39,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:00:39,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:00:39,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:00:39,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:00:39,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:00:39,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:00:39,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:00:39,414 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:00:39,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:00:39,415 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:00:39,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:00:39,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:00:39,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:00:39,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:00:39,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:00:39,416 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:00:39,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:00:39,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:00:39,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:00:39,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:00:39,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:00:39,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:00:39,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2022-11-22 02:00:39,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:00:39,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:00:39,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:00:39,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:00:39,751 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:00:39,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2022-11-22 02:00:42,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:00:43,205 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:00:43,207 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2022-11-22 02:00:43,238 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/data/2641aa543/9461981ef4ab49b4aff192f88c22666d/FLAG90b683169 [2022-11-22 02:00:43,255 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/data/2641aa543/9461981ef4ab49b4aff192f88c22666d [2022-11-22 02:00:43,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:00:43,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:00:43,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:00:43,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:00:43,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:00:43,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:00:43" (1/1) ... [2022-11-22 02:00:43,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ef6cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:43, skipping insertion in model container [2022-11-22 02:00:43,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:00:43" (1/1) ... [2022-11-22 02:00:43,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:00:43,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:00:43,894 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2022-11-22 02:00:43,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:00:43,955 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:00:44,043 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2022-11-22 02:00:44,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:00:44,105 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:00:44,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44 WrapperNode [2022-11-22 02:00:44,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:00:44,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:00:44,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:00:44,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:00:44,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,201 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1167 [2022-11-22 02:00:44,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:00:44,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:00:44,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:00:44,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:00:44,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:00:44,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:00:44,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:00:44,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:00:44,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (1/1) ... [2022-11-22 02:00:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:00:44,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:44,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:00:44,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:00:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:00:44,390 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:00:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:00:44,390 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:00:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:00:44,390 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:00:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:00:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:00:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:00:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:00:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:00:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:00:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 02:00:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 02:00:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:00:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:00:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:00:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:00:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-22 02:00:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-22 02:00:44,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:00:44,393 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 02:00:44,394 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 02:00:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 02:00:44,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 02:00:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:00:44,395 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:00:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:00:44,395 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:00:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 02:00:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 02:00:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:00:44,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:00:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:00:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:00:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:00:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:00:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:00:44,398 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:00:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:00:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:00:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:00:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:00:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:00:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:00:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:00:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:00:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:00:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:00:44,401 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:00:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:00:44,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:00:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:00:44,402 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:00:44,403 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-22 02:00:44,403 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-22 02:00:44,621 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:00:44,623 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:00:45,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:00:46,619 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:00:46,619 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:00:46,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:00:46 BoogieIcfgContainer [2022-11-22 02:00:46,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:00:46,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:00:46,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:00:46,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:00:46,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:00:43" (1/3) ... [2022-11-22 02:00:46,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:00:46, skipping insertion in model container [2022-11-22 02:00:46,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:00:44" (2/3) ... [2022-11-22 02:00:46,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:00:46, skipping insertion in model container [2022-11-22 02:00:46,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:00:46" (3/3) ... [2022-11-22 02:00:46,640 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2022-11-22 02:00:46,663 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:00:46,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:00:46,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:00:46,758 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40533e48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:00:46,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:00:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-22 02:00:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 02:00:46,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:46,791 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:00:46,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:00:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -758143776, now seen corresponding path program 1 times [2022-11-22 02:00:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:46,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710105339] [2022-11-22 02:00:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:46,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:00:47,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:47,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710105339] [2022-11-22 02:00:47,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710105339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:00:47,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:00:47,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:00:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124394773] [2022-11-22 02:00:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:00:47,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:00:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:00:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:00:47,988 INFO L87 Difference]: Start difference. First operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-22 02:00:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:50,584 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2022-11-22 02:00:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:00:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-22 02:00:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:50,619 INFO L225 Difference]: With dead ends: 1260 [2022-11-22 02:00:50,620 INFO L226 Difference]: Without dead ends: 887 [2022-11-22 02:00:50,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:00:50,630 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1237 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:50,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1121 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 02:00:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-22 02:00:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2022-11-22 02:00:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 559 states have (on average 1.5992844364937389) internal successors, (894), 589 states have internal predecessors, (894), 195 states have call successors, (195), 44 states have call predecessors, (195), 45 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2022-11-22 02:00:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2022-11-22 02:00:50,796 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2022-11-22 02:00:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:50,802 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2022-11-22 02:00:50,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-22 02:00:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2022-11-22 02:00:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 02:00:50,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:50,818 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:00:50,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:00:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 825329100, now seen corresponding path program 1 times [2022-11-22 02:00:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:50,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877776118] [2022-11-22 02:00:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:00:51,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877776118] [2022-11-22 02:00:51,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877776118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:00:51,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:00:51,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:00:51,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741106901] [2022-11-22 02:00:51,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:00:51,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:00:51,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:00:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:00:51,434 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 02:00:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:55,242 INFO L93 Difference]: Finished difference Result 2754 states and 4471 transitions. [2022-11-22 02:00:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:00:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2022-11-22 02:00:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:55,259 INFO L225 Difference]: With dead ends: 2754 [2022-11-22 02:00:55,260 INFO L226 Difference]: Without dead ends: 1977 [2022-11-22 02:00:55,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:00:55,267 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1367 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 5188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 4480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:55,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2161 Invalid, 5188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [708 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:00:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-11-22 02:00:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1790. [2022-11-22 02:00:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1214 states have (on average 1.57166392092257) internal successors, (1908), 1286 states have internal predecessors, (1908), 482 states have call successors, (482), 81 states have call predecessors, (482), 93 states have return successors, (501), 455 states have call predecessors, (501), 477 states have call successors, (501) [2022-11-22 02:00:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2891 transitions. [2022-11-22 02:00:55,430 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2891 transitions. Word has length 98 [2022-11-22 02:00:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:55,430 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 2891 transitions. [2022-11-22 02:00:55,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 02:00:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2891 transitions. [2022-11-22 02:00:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 02:00:55,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:55,435 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:55,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:00:55,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:00:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1070950840, now seen corresponding path program 1 times [2022-11-22 02:00:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028640900] [2022-11-22 02:00:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:00:55,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:55,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028640900] [2022-11-22 02:00:55,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028640900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:00:55,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:00:55,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:00:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902016079] [2022-11-22 02:00:55,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:00:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:00:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:00:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:00:55,977 INFO L87 Difference]: Start difference. First operand 1790 states and 2891 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 02:00:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:58,438 INFO L93 Difference]: Finished difference Result 4525 states and 7322 transitions. [2022-11-22 02:00:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:00:58,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2022-11-22 02:00:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:58,457 INFO L225 Difference]: With dead ends: 4525 [2022-11-22 02:00:58,458 INFO L226 Difference]: Without dead ends: 2760 [2022-11-22 02:00:58,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:00:58,468 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1165 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:58,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 1661 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 02:00:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2022-11-22 02:00:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2642. [2022-11-22 02:00:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1818 states have (on average 1.5792079207920793) internal successors, (2871), 1917 states have internal predecessors, (2871), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2022-11-22 02:00:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4262 transitions. [2022-11-22 02:00:58,698 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4262 transitions. Word has length 99 [2022-11-22 02:00:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:58,700 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 4262 transitions. [2022-11-22 02:00:58,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 02:00:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4262 transitions. [2022-11-22 02:00:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 02:00:58,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:58,706 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:00:58,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:00:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash -468836236, now seen corresponding path program 1 times [2022-11-22 02:00:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918016573] [2022-11-22 02:00:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:58,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:00:59,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:59,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918016573] [2022-11-22 02:00:59,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918016573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:00:59,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:00:59,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:00:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020109815] [2022-11-22 02:00:59,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:00:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:00:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:00:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:00:59,093 INFO L87 Difference]: Start difference. First operand 2642 states and 4262 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 02:00:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:59,939 INFO L93 Difference]: Finished difference Result 2743 states and 4428 transitions. [2022-11-22 02:00:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:00:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2022-11-22 02:00:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:59,964 INFO L225 Difference]: With dead ends: 2743 [2022-11-22 02:00:59,964 INFO L226 Difference]: Without dead ends: 2728 [2022-11-22 02:00:59,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:00:59,976 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 669 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:59,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1872 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:00:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-11-22 02:01:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2648. [2022-11-22 02:01:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1824 states have (on average 1.5773026315789473) internal successors, (2877), 1923 states have internal predecessors, (2877), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2022-11-22 02:01:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4268 transitions. [2022-11-22 02:01:00,190 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4268 transitions. Word has length 103 [2022-11-22 02:01:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:00,192 INFO L495 AbstractCegarLoop]: Abstraction has 2648 states and 4268 transitions. [2022-11-22 02:01:00,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 02:01:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4268 transitions. [2022-11-22 02:01:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 02:01:00,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:00,201 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:00,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:01:00,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:01:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:00,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1787429607, now seen corresponding path program 1 times [2022-11-22 02:01:00,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:00,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132645372] [2022-11-22 02:01:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:00,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:01:00,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132645372] [2022-11-22 02:01:00,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132645372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:00,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:00,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 02:01:00,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302394119] [2022-11-22 02:01:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:00,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:01:00,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:01:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:01:00,872 INFO L87 Difference]: Start difference. First operand 2648 states and 4268 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-22 02:01:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:07,540 INFO L93 Difference]: Finished difference Result 3073 states and 4910 transitions. [2022-11-22 02:01:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 02:01:07,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2022-11-22 02:01:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:07,559 INFO L225 Difference]: With dead ends: 3073 [2022-11-22 02:01:07,559 INFO L226 Difference]: Without dead ends: 3056 [2022-11-22 02:01:07,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 02:01:07,565 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 2671 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 8794 mSolverCounterSat, 1581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2697 SdHoareTripleChecker+Valid, 3942 SdHoareTripleChecker+Invalid, 10375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1581 IncrementalHoareTripleChecker+Valid, 8794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:07,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2697 Valid, 3942 Invalid, 10375 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1581 Valid, 8794 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-22 02:01:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-11-22 02:01:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2836. [2022-11-22 02:01:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1966 states have (on average 1.5768056968463886) internal successors, (3100), 2063 states have internal predecessors, (3100), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2022-11-22 02:01:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4529 transitions. [2022-11-22 02:01:07,807 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4529 transitions. Word has length 108 [2022-11-22 02:01:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:07,808 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 4529 transitions. [2022-11-22 02:01:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-22 02:01:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4529 transitions. [2022-11-22 02:01:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-22 02:01:07,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:07,812 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:07,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:01:07,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:01:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash 254270488, now seen corresponding path program 1 times [2022-11-22 02:01:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948453407] [2022-11-22 02:01:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:07,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:01:11,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948453407] [2022-11-22 02:01:11,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948453407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013789108] [2022-11-22 02:01:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:11,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:11,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:11,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:11,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:01:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:12,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:01:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:01:12,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:01:12,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013789108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:12,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:01:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 29 [2022-11-22 02:01:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734903846] [2022-11-22 02:01:12,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:01:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:01:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:01:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:01:12,181 INFO L87 Difference]: Start difference. First operand 2836 states and 4529 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-22 02:01:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:12,636 INFO L93 Difference]: Finished difference Result 2999 states and 4796 transitions. [2022-11-22 02:01:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:01:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2022-11-22 02:01:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:12,657 INFO L225 Difference]: With dead ends: 2999 [2022-11-22 02:01:12,658 INFO L226 Difference]: Without dead ends: 2984 [2022-11-22 02:01:12,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:01:12,662 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 58 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:12,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2359 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:01:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-11-22 02:01:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2850. [2022-11-22 02:01:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1980 states have (on average 1.5727272727272728) internal successors, (3114), 2077 states have internal predecessors, (3114), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2022-11-22 02:01:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 4543 transitions. [2022-11-22 02:01:12,978 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 4543 transitions. Word has length 115 [2022-11-22 02:01:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:12,979 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 4543 transitions. [2022-11-22 02:01:12,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-22 02:01:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 4543 transitions. [2022-11-22 02:01:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-22 02:01:12,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:12,985 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:12,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:01:13,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:13,195 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:01:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash -813856842, now seen corresponding path program 1 times [2022-11-22 02:01:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098181137] [2022-11-22 02:01:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 02:01:15,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:01:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098181137] [2022-11-22 02:01:15,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098181137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:15,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456282126] [2022-11-22 02:01:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:15,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:15,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:15,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:15,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782b063c-d188-4f65-86c8-7289cdb17cfa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:01:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-22 02:01:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:01:17,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:05:00,859 WARN L233 SmtUtils]: Spent 3.66m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-22 02:08:29,644 WARN L233 SmtUtils]: Spent 3.44m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-22 02:12:06,677 WARN L233 SmtUtils]: Spent 3.57m on a formula simplification. DAG size of input: 2885 DAG size of output: 105 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)