./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:44:11,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:44:11,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:44:11,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:44:11,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:44:11,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:44:11,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:44:11,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:44:11,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:44:11,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:44:11,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:44:11,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:44:11,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:44:11,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:44:11,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:44:11,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:44:11,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:44:11,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:44:11,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:44:11,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:44:11,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:44:11,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:44:11,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:44:11,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:44:11,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:44:11,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:44:11,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:44:11,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:44:11,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:44:11,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:44:11,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:44:11,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:44:11,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:44:11,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:44:11,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:44:11,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:44:11,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:44:11,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:44:11,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:44:11,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:44:11,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:44:11,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:44:11,443 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:44:11,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:44:11,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:44:11,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:44:11,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:44:11,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:44:11,445 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:44:11,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:44:11,446 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:44:11,446 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:44:11,447 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:44:11,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:44:11,447 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:44:11,447 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:44:11,448 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:44:11,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:44:11,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:44:11,449 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:44:11,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:44:11,450 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:44:11,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:44:11,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:44:11,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:44:11,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:44:11,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:44:11,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:44:11,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:44:11,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:44:11,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:44:11,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:44:11,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:44:11,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:44:11,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:44:11,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:44:11,454 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:44:11,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:44:11,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:44:11,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:44:11,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:44:11,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:44:11,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:44:11,456 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_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 [2022-11-26 00:44:11,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:44:11,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:44:11,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:44:11,774 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:44:11,776 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:44:11,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-11-26 00:44:14,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:44:15,324 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:44:15,328 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-11-26 00:44:15,344 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/data/89b51ed24/a88336330da04c6880fdc4dda78e40d2/FLAGa4f55b42e [2022-11-26 00:44:15,369 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/data/89b51ed24/a88336330da04c6880fdc4dda78e40d2 [2022-11-26 00:44:15,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:44:15,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:44:15,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:44:15,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:44:15,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:44:15,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:44:15" (1/1) ... [2022-11-26 00:44:15,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38496e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:15, skipping insertion in model container [2022-11-26 00:44:15,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:44:15" (1/1) ... [2022-11-26 00:44:15,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:44:15,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:44:16,057 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_db5a74d8-9c52-4e05-8f63-743620b77606/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-11-26 00:44:16,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:44:16,137 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:44:16,230 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_db5a74d8-9c52-4e05-8f63-743620b77606/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-11-26 00:44:16,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:44:16,271 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:44:16,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16 WrapperNode [2022-11-26 00:44:16,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:44:16,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:44:16,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:44:16,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:44:16,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,389 INFO L138 Inliner]: procedures = 92, calls = 346, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1091 [2022-11-26 00:44:16,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:44:16,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:44:16,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:44:16,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:44:16,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:44:16,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:44:16,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:44:16,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:44:16,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (1/1) ... [2022-11-26 00:44:16,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:44:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:16,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:44:16,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:44:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:44:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-26 00:44:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-26 00:44:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 00:44:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 00:44:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-26 00:44:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-26 00:44:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:44:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:44:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:44:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:44:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:44:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:44:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 00:44:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 00:44:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:44:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:44:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:44:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:44:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:44:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:44:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:44:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:44:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:44:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:44:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:44:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:44:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:44:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:44:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:44:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:44:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-26 00:44:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-26 00:44:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:44:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:44:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-26 00:44:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-26 00:44:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:44:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:44:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:44:16,596 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:44:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:44:16,596 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:44:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:44:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:44:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:44:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 00:44:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 00:44:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:44:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:44:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:44:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:44:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:44:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:44:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:44:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:44:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:44:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:44:16,763 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:44:16,766 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:44:18,229 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:44:19,049 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:44:19,050 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:44:19,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:44:19 BoogieIcfgContainer [2022-11-26 00:44:19,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:44:19,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:44:19,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:44:19,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:44:19,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:44:15" (1/3) ... [2022-11-26 00:44:19,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca43fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:44:19, skipping insertion in model container [2022-11-26 00:44:19,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:16" (2/3) ... [2022-11-26 00:44:19,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca43fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:44:19, skipping insertion in model container [2022-11-26 00:44:19,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:44:19" (3/3) ... [2022-11-26 00:44:19,071 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2022-11-26 00:44:19,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:44:19,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:44:19,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:44:19,160 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;@314dacaf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:44:19,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:44:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-26 00:44:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:44:19,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:19,189 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:44:19,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1894499934, now seen corresponding path program 1 times [2022-11-26 00:44:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:19,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287559871] [2022-11-26 00:44:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:44:20,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287559871] [2022-11-26 00:44:20,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287559871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987739096] [2022-11-26 00:44:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:20,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:20,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:20,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:44:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:44:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:44:20,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:20,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987739096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:20,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:20,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:44:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555918301] [2022-11-26 00:44:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:20,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:20,807 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:44:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:21,164 INFO L93 Difference]: Finished difference Result 1153 states and 1836 transitions. [2022-11-26 00:44:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-26 00:44:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:21,187 INFO L225 Difference]: With dead ends: 1153 [2022-11-26 00:44:21,187 INFO L226 Difference]: Without dead ends: 745 [2022-11-26 00:44:21,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:21,198 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 513 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:21,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1296 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-26 00:44:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 733. [2022-11-26 00:44:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.5598377281947262) internal successors, (769), 524 states have internal predecessors, (769), 191 states have call successors, (191), 49 states have call predecessors, (191), 48 states have return successors, (193), 185 states have call predecessors, (193), 188 states have call successors, (193) [2022-11-26 00:44:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1153 transitions. [2022-11-26 00:44:21,312 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1153 transitions. Word has length 88 [2022-11-26 00:44:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:21,313 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1153 transitions. [2022-11-26 00:44:21,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:44:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1153 transitions. [2022-11-26 00:44:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:44:21,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:21,320 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:44:21,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:21,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:44:21,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1403473205, now seen corresponding path program 1 times [2022-11-26 00:44:21,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:21,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123105478] [2022-11-26 00:44:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:21,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:44:22,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123105478] [2022-11-26 00:44:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123105478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257518171] [2022-11-26 00:44:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:22,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:22,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:22,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:44:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:44:22,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:44:22,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:22,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257518171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:22,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:22,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:44:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745411531] [2022-11-26 00:44:22,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:22,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:22,602 INFO L87 Difference]: Start difference. First operand 733 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-26 00:44:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:22,847 INFO L93 Difference]: Finished difference Result 1795 states and 2854 transitions. [2022-11-26 00:44:22,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:22,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-26 00:44:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:22,856 INFO L225 Difference]: With dead ends: 1795 [2022-11-26 00:44:22,856 INFO L226 Difference]: Without dead ends: 1074 [2022-11-26 00:44:22,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:22,863 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 568 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:22,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1185 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-11-26 00:44:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2022-11-26 00:44:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 710 states have (on average 1.5676056338028168) internal successors, (1113), 756 states have internal predecessors, (1113), 271 states have call successors, (271), 68 states have call predecessors, (271), 68 states have return successors, (278), 264 states have call predecessors, (278), 268 states have call successors, (278) [2022-11-26 00:44:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1662 transitions. [2022-11-26 00:44:22,962 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1662 transitions. Word has length 87 [2022-11-26 00:44:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:22,963 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1662 transitions. [2022-11-26 00:44:22,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-26 00:44:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1662 transitions. [2022-11-26 00:44:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:44:22,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:22,970 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:44:22,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-26 00:44:23,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1601677810, now seen corresponding path program 1 times [2022-11-26 00:44:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:23,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472920665] [2022-11-26 00:44:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:44:23,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:23,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472920665] [2022-11-26 00:44:23,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472920665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:23,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:23,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:44:23,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907983695] [2022-11-26 00:44:23,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:23,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:23,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:23,687 INFO L87 Difference]: Start difference. First operand 1050 states and 1662 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:44:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:25,027 INFO L93 Difference]: Finished difference Result 3541 states and 5778 transitions. [2022-11-26 00:44:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:44:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-26 00:44:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:25,046 INFO L225 Difference]: With dead ends: 3541 [2022-11-26 00:44:25,046 INFO L226 Difference]: Without dead ends: 2503 [2022-11-26 00:44:25,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:25,059 INFO L413 NwaCegarLoop]: 977 mSDtfsCounter, 828 mSDsluCounter, 3273 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 4250 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:25,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 4250 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:44:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-11-26 00:44:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1960. [2022-11-26 00:44:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1352 states have (on average 1.5754437869822486) internal successors, (2130), 1440 states have internal predecessors, (2130), 482 states have call successors, (482), 124 states have call predecessors, (482), 125 states have return successors, (529), 455 states have call predecessors, (529), 478 states have call successors, (529) [2022-11-26 00:44:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3141 transitions. [2022-11-26 00:44:25,237 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3141 transitions. Word has length 88 [2022-11-26 00:44:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:25,238 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 3141 transitions. [2022-11-26 00:44:25,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:44:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3141 transitions. [2022-11-26 00:44:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-26 00:44:25,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:25,243 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:44:25,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:44:25,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1173323453, now seen corresponding path program 1 times [2022-11-26 00:44:25,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:25,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642665738] [2022-11-26 00:44:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:25,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:44:25,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642665738] [2022-11-26 00:44:25,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642665738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069177455] [2022-11-26 00:44:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:25,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:25,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:25,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:25,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:44:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:44:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:44:26,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:26,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069177455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:26,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:26,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-26 00:44:26,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627166629] [2022-11-26 00:44:26,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:26,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:26,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:44:26,100 INFO L87 Difference]: Start difference. First operand 1960 states and 3141 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:44:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:27,344 INFO L93 Difference]: Finished difference Result 5763 states and 9465 transitions. [2022-11-26 00:44:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:44:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-26 00:44:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:27,381 INFO L225 Difference]: With dead ends: 5763 [2022-11-26 00:44:27,381 INFO L226 Difference]: Without dead ends: 3815 [2022-11-26 00:44:27,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:44:27,412 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 645 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:27,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 3008 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:44:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2022-11-26 00:44:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 3785. [2022-11-26 00:44:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2528 states have (on average 1.5051424050632911) internal successors, (3805), 2750 states have internal predecessors, (3805), 1029 states have call successors, (1029), 224 states have call predecessors, (1029), 227 states have return successors, (1219), 946 states have call predecessors, (1219), 1023 states have call successors, (1219) [2022-11-26 00:44:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 6053 transitions. [2022-11-26 00:44:27,778 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 6053 transitions. Word has length 89 [2022-11-26 00:44:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:27,778 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 6053 transitions. [2022-11-26 00:44:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:44:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 6053 transitions. [2022-11-26 00:44:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:44:27,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:27,782 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:44:27,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:27,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash -331275658, now seen corresponding path program 1 times [2022-11-26 00:44:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117950190] [2022-11-26 00:44:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:44:28,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117950190] [2022-11-26 00:44:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117950190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75573465] [2022-11-26 00:44:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:28,339 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:28,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:44:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:44:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:44:28,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:28,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75573465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:28,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:28,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:44:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216058623] [2022-11-26 00:44:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:28,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:28,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:28,841 INFO L87 Difference]: Start difference. First operand 3785 states and 6053 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-26 00:44:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:29,346 INFO L93 Difference]: Finished difference Result 8289 states and 13335 transitions. [2022-11-26 00:44:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-26 00:44:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:29,384 INFO L225 Difference]: With dead ends: 8289 [2022-11-26 00:44:29,385 INFO L226 Difference]: Without dead ends: 4516 [2022-11-26 00:44:29,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:29,417 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 566 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:29,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1290 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2022-11-26 00:44:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 3722. [2022-11-26 00:44:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 2485 states have (on average 1.5038229376257546) internal successors, (3737), 2706 states have internal predecessors, (3737), 1017 states have call successors, (1017), 220 states have call predecessors, (1017), 219 states have return successors, (1166), 931 states have call predecessors, (1166), 1011 states have call successors, (1166) [2022-11-26 00:44:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5920 transitions. [2022-11-26 00:44:29,706 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5920 transitions. Word has length 88 [2022-11-26 00:44:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:29,707 INFO L495 AbstractCegarLoop]: Abstraction has 3722 states and 5920 transitions. [2022-11-26 00:44:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-26 00:44:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5920 transitions. [2022-11-26 00:44:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:44:29,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:29,714 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] [2022-11-26 00:44:29,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:29,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:29,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1123085548, now seen corresponding path program 1 times [2022-11-26 00:44:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182191604] [2022-11-26 00:44:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:29,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:44:30,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:30,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182191604] [2022-11-26 00:44:30,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182191604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:30,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929440597] [2022-11-26 00:44:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:30,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:30,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:30,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:30,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:44:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:44:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:44:31,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:31,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929440597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:31,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:31,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-26 00:44:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730428956] [2022-11-26 00:44:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:31,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:44:31,458 INFO L87 Difference]: Start difference. First operand 3722 states and 5920 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-26 00:44:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:34,342 INFO L93 Difference]: Finished difference Result 9218 states and 14985 transitions. [2022-11-26 00:44:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:44:34,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-26 00:44:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:34,391 INFO L225 Difference]: With dead ends: 9218 [2022-11-26 00:44:34,391 INFO L226 Difference]: Without dead ends: 5508 [2022-11-26 00:44:34,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:44:34,425 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1590 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:34,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2476 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:44:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2022-11-26 00:44:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 4062. [2022-11-26 00:44:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 2741 states have (on average 1.4866836920831814) internal successors, (4075), 2970 states have internal predecessors, (4075), 1077 states have call successors, (1077), 248 states have call predecessors, (1077), 243 states have return successors, (1228), 979 states have call predecessors, (1228), 1071 states have call successors, (1228) [2022-11-26 00:44:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6380 transitions. [2022-11-26 00:44:34,891 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6380 transitions. Word has length 94 [2022-11-26 00:44:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:34,892 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 6380 transitions. [2022-11-26 00:44:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-26 00:44:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6380 transitions. [2022-11-26 00:44:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-26 00:44:34,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:34,895 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] [2022-11-26 00:44:34,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:35,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:35,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1329423846, now seen corresponding path program 1 times [2022-11-26 00:44:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:35,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941730043] [2022-11-26 00:44:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:35,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:44:35,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:35,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941730043] [2022-11-26 00:44:35,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941730043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425039477] [2022-11-26 00:44:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:35,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:35,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:44:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:44:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:44:36,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:36,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425039477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:36,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:36,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-26 00:44:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290515721] [2022-11-26 00:44:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:44:36,244 INFO L87 Difference]: Start difference. First operand 4062 states and 6380 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:44:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:37,043 INFO L93 Difference]: Finished difference Result 8449 states and 13578 transitions. [2022-11-26 00:44:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-11-26 00:44:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:37,102 INFO L225 Difference]: With dead ends: 8449 [2022-11-26 00:44:37,102 INFO L226 Difference]: Without dead ends: 5228 [2022-11-26 00:44:37,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:44:37,124 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 139 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:37,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3166 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2022-11-26 00:44:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4286. [2022-11-26 00:44:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 2893 states have (on average 1.4811614241272035) internal successors, (4285), 3143 states have internal predecessors, (4285), 1136 states have call successors, (1136), 248 states have call predecessors, (1136), 256 states have return successors, (1327), 1048 states have call predecessors, (1327), 1130 states have call successors, (1327) [2022-11-26 00:44:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6748 transitions. [2022-11-26 00:44:37,702 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6748 transitions. Word has length 99 [2022-11-26 00:44:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:37,703 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 6748 transitions. [2022-11-26 00:44:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:44:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6748 transitions. [2022-11-26 00:44:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-26 00:44:37,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:37,710 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] [2022-11-26 00:44:37,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:37,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:37,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2105034181, now seen corresponding path program 1 times [2022-11-26 00:44:37,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:37,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919882346] [2022-11-26 00:44:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:37,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:44:38,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:38,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919882346] [2022-11-26 00:44:38,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919882346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:38,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059465035] [2022-11-26 00:44:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:38,686 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:38,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:44:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:44:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:44:39,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:44:39,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059465035] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:39,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:44:39,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-26 00:44:39,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779442265] [2022-11-26 00:44:39,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:39,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:44:39,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:39,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:44:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:44:39,817 INFO L87 Difference]: Start difference. First operand 4286 states and 6748 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-26 00:44:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:44,455 INFO L93 Difference]: Finished difference Result 11696 states and 19385 transitions. [2022-11-26 00:44:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:44:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-26 00:44:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:44,526 INFO L225 Difference]: With dead ends: 11696 [2022-11-26 00:44:44,526 INFO L226 Difference]: Without dead ends: 8617 [2022-11-26 00:44:44,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:44:44,555 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 3071 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 1442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3158 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1442 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:44,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3158 Valid, 2994 Invalid, 4090 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1442 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 00:44:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2022-11-26 00:44:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 7416. [2022-11-26 00:44:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2400), 1563 states have call predecessors, (2400), 1663 states have call successors, (2400) [2022-11-26 00:44:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11828 transitions. [2022-11-26 00:44:45,318 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11828 transitions. Word has length 103 [2022-11-26 00:44:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:45,319 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11828 transitions. [2022-11-26 00:44:45,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-26 00:44:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11828 transitions. [2022-11-26 00:44:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:44:45,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:45,324 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] [2022-11-26 00:44:45,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:44:45,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:45,533 INFO L85 PathProgramCache]: Analyzing trace with hash 27441700, now seen corresponding path program 1 times [2022-11-26 00:44:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:45,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166718596] [2022-11-26 00:44:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:45,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:44:46,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166718596] [2022-11-26 00:44:46,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166718596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401916086] [2022-11-26 00:44:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:46,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:46,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:46,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:46,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:44:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:44:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:44:46,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:46,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401916086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:46,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:46,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-26 00:44:46,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336332508] [2022-11-26 00:44:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:46,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:46,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:44:46,899 INFO L87 Difference]: Start difference. First operand 7416 states and 11828 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-26 00:44:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:48,147 INFO L93 Difference]: Finished difference Result 13639 states and 21806 transitions. [2022-11-26 00:44:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-26 00:44:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:48,204 INFO L225 Difference]: With dead ends: 13639 [2022-11-26 00:44:48,204 INFO L226 Difference]: Without dead ends: 7438 [2022-11-26 00:44:48,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:44:48,242 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 424 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:48,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2597 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:44:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2022-11-26 00:44:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 7416. [2022-11-26 00:44:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2392), 1563 states have call predecessors, (2392), 1663 states have call successors, (2392) [2022-11-26 00:44:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11820 transitions. [2022-11-26 00:44:48,911 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11820 transitions. Word has length 107 [2022-11-26 00:44:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:48,912 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11820 transitions. [2022-11-26 00:44:48,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-26 00:44:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11820 transitions. [2022-11-26 00:44:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-26 00:44:48,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:48,918 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:48,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:49,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:49,128 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1596106138, now seen corresponding path program 1 times [2022-11-26 00:44:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:49,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430299882] [2022-11-26 00:44:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:49,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:44:49,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430299882] [2022-11-26 00:44:49,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430299882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578748737] [2022-11-26 00:44:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:49,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:49,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:49,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:49,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:44:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:44:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:44:50,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:50,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578748737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:50,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:50,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-26 00:44:50,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068296913] [2022-11-26 00:44:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:50,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:50,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:50,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:44:50,572 INFO L87 Difference]: Start difference. First operand 7416 states and 11820 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 00:44:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:53,372 INFO L93 Difference]: Finished difference Result 25214 states and 43217 transitions. [2022-11-26 00:44:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:44:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-26 00:44:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:53,558 INFO L225 Difference]: With dead ends: 25214 [2022-11-26 00:44:53,558 INFO L226 Difference]: Without dead ends: 17810 [2022-11-26 00:44:53,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:44:53,633 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 795 mSDsluCounter, 3023 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:53,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 4010 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:44:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2022-11-26 00:44:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 14718. [2022-11-26 00:44:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14718 states, 10400 states have (on average 1.4820192307692308) internal successors, (15413), 10992 states have internal predecessors, (15413), 3321 states have call successors, (3321), 917 states have call predecessors, (3321), 996 states have return successors, (5519), 3054 states have call predecessors, (5519), 3309 states have call successors, (5519) [2022-11-26 00:44:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14718 states to 14718 states and 24253 transitions. [2022-11-26 00:44:55,422 INFO L78 Accepts]: Start accepts. Automaton has 14718 states and 24253 transitions. Word has length 134 [2022-11-26 00:44:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:55,423 INFO L495 AbstractCegarLoop]: Abstraction has 14718 states and 24253 transitions. [2022-11-26 00:44:55,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 00:44:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14718 states and 24253 transitions. [2022-11-26 00:44:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-26 00:44:55,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:55,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:55,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:44:55,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1842273458, now seen corresponding path program 1 times [2022-11-26 00:44:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519334384] [2022-11-26 00:44:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 00:44:56,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:56,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519334384] [2022-11-26 00:44:56,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519334384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:56,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:56,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-26 00:44:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083617421] [2022-11-26 00:44:56,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:56,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:44:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:44:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:44:56,711 INFO L87 Difference]: Start difference. First operand 14718 states and 24253 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-26 00:45:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:06,867 INFO L93 Difference]: Finished difference Result 55482 states and 95732 transitions. [2022-11-26 00:45:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:45:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-26 00:45:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:07,439 INFO L225 Difference]: With dead ends: 55482 [2022-11-26 00:45:07,439 INFO L226 Difference]: Without dead ends: 40776 [2022-11-26 00:45:07,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:45:07,551 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 3321 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 7629 mSolverCounterSat, 1482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 4114 SdHoareTripleChecker+Invalid, 9111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1482 IncrementalHoareTripleChecker+Valid, 7629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:07,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 4114 Invalid, 9111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1482 Valid, 7629 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-26 00:45:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40776 states. [2022-11-26 00:45:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40776 to 35281. [2022-11-26 00:45:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35281 states, 25970 states have (on average 1.4867539468617637) internal successors, (38611), 26922 states have internal predecessors, (38611), 6528 states have call successors, (6528), 2517 states have call predecessors, (6528), 2782 states have return successors, (10695), 6267 states have call predecessors, (10695), 6508 states have call successors, (10695) [2022-11-26 00:45:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35281 states to 35281 states and 55834 transitions. [2022-11-26 00:45:11,931 INFO L78 Accepts]: Start accepts. Automaton has 35281 states and 55834 transitions. Word has length 140 [2022-11-26 00:45:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:11,936 INFO L495 AbstractCegarLoop]: Abstraction has 35281 states and 55834 transitions. [2022-11-26 00:45:11,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-26 00:45:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 35281 states and 55834 transitions. [2022-11-26 00:45:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-26 00:45:11,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:11,949 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:11,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:45:11,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:11,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1036114187, now seen corresponding path program 1 times [2022-11-26 00:45:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718480738] [2022-11-26 00:45:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:11,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-26 00:45:12,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718480738] [2022-11-26 00:45:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718480738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:12,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:45:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853412810] [2022-11-26 00:45:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:12,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:45:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:45:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:45:12,094 INFO L87 Difference]: Start difference. First operand 35281 states and 55834 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-26 00:45:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:17,314 INFO L93 Difference]: Finished difference Result 82436 states and 132249 transitions. [2022-11-26 00:45:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:45:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2022-11-26 00:45:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:17,663 INFO L225 Difference]: With dead ends: 82436 [2022-11-26 00:45:17,664 INFO L226 Difference]: Without dead ends: 47167 [2022-11-26 00:45:17,872 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:45:17,873 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 527 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:17,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1390 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:45:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47167 states. [2022-11-26 00:45:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47167 to 46798. [2022-11-26 00:45:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46798 states, 34496 states have (on average 1.4868100649350648) internal successors, (51289), 35774 states have internal predecessors, (51289), 8604 states have call successors, (8604), 3326 states have call predecessors, (8604), 3697 states have return successors, (14202), 8267 states have call predecessors, (14202), 8584 states have call successors, (14202) [2022-11-26 00:45:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46798 states to 46798 states and 74095 transitions. [2022-11-26 00:45:22,531 INFO L78 Accepts]: Start accepts. Automaton has 46798 states and 74095 transitions. Word has length 173 [2022-11-26 00:45:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:22,532 INFO L495 AbstractCegarLoop]: Abstraction has 46798 states and 74095 transitions. [2022-11-26 00:45:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-26 00:45:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 46798 states and 74095 transitions. [2022-11-26 00:45:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-26 00:45:22,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:22,548 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:22,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:45:22,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1134990666, now seen corresponding path program 1 times [2022-11-26 00:45:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:22,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123042289] [2022-11-26 00:45:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:22,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-26 00:45:22,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123042289] [2022-11-26 00:45:22,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123042289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794318176] [2022-11-26 00:45:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:22,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:22,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db5a74d8-9c52-4e05-8f63-743620b77606/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:45:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:45:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:45:23,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:45:23,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794318176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:23,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:45:23,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-11-26 00:45:23,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325172838] [2022-11-26 00:45:23,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:23,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:45:23,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:45:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:45:23,460 INFO L87 Difference]: Start difference. First operand 46798 states and 74095 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-26 00:45:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:31,111 INFO L93 Difference]: Finished difference Result 124608 states and 199792 transitions. [2022-11-26 00:45:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:45:31,112 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2022-11-26 00:45:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:31,755 INFO L225 Difference]: With dead ends: 124608 [2022-11-26 00:45:31,756 INFO L226 Difference]: Without dead ends: 81042 [2022-11-26 00:45:31,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:45:31,941 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 709 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:31,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 4636 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:45:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81042 states.