./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:38:19,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:38:19,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:38:19,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:38:19,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:38:19,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:38:19,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:38:19,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:38:19,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:38:19,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:38:19,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:38:19,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:38:19,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:38:19,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:38:19,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:38:19,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:38:19,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:38:19,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:38:19,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:38:19,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:38:19,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:38:19,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:38:19,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:38:19,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:38:19,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:38:19,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:38:19,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:38:19,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:38:19,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:38:19,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:38:19,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:38:19,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:38:19,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:38:19,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:38:19,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:38:19,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:38:19,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:38:19,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:38:19,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:38:19,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:38:19,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:38:19,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:38:19,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:38:19,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:38:19,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:38:19,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:38:19,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:38:19,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:38:19,401 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:38:19,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:38:19,401 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:38:19,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:38:19,402 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:38:19,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:38:19,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:38:19,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:38:19,403 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:38:19,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:38:19,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:38:19,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:38:19,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:38:19,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:38:19,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:38:19,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:38:19,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:38:19,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:38:19,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:38:19,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:38:19,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:38:19,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:38:19,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:38:19,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:38:19,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:38:19,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:38:19,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:38:19,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:38:19,407 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:38:19,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:38:19,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:38:19,408 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:38:19,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:38:19,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:38:19,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:38:19,409 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_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2022-11-22 01:38:19,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:38:19,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:38:19,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:38:19,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:38:19,713 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:38:19,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2022-11-22 01:38:22,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:38:23,257 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:38:23,262 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2022-11-22 01:38:23,280 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/data/d91fe7a05/ef90f1366762403c915a0a34e8dcdabc/FLAGa683e6040 [2022-11-22 01:38:23,295 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/data/d91fe7a05/ef90f1366762403c915a0a34e8dcdabc [2022-11-22 01:38:23,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:38:23,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:38:23,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:38:23,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:38:23,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:38:23,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:38:23" (1/1) ... [2022-11-22 01:38:23,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d86b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:23, skipping insertion in model container [2022-11-22 01:38:23,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:38:23" (1/1) ... [2022-11-22 01:38:23,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:38:23,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:38:23,779 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_c6236bb2-c056-4482-9dce-bca4c872b68f/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2022-11-22 01:38:24,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:38:24,086 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:38:24,125 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_c6236bb2-c056-4482-9dce-bca4c872b68f/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2022-11-22 01:38:24,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:38:24,309 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:38:24,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24 WrapperNode [2022-11-22 01:38:24,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:38:24,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:38:24,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:38:24,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:38:24,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,410 INFO L138 Inliner]: procedures = 93, calls = 353, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 949 [2022-11-22 01:38:24,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:38:24,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:38:24,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:38:24,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:38:24,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,472 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:38:24,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:38:24,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:38:24,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:38:24,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (1/1) ... [2022-11-22 01:38:24,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:38:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:24,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:38:24,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:38:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:38:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 01:38:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 01:38:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:38:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:38:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:38:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:38:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:38:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:38:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 01:38:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 01:38:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:38:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:38:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 01:38:24,611 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 01:38:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:38:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:38:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:38:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:38:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:38:24,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:38:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:38:24,614 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:38:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:38:24,614 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:38:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:38:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:38:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 01:38:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 01:38:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-22 01:38:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-22 01:38:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:38:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:38:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-22 01:38:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-22 01:38:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:38:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:38:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:38:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:38:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:38:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:38:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:38:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:38:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:38:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 01:38:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 01:38:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:38:24,619 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:38:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:38:24,620 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:38:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:38:24,621 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:38:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-22 01:38:24,621 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-22 01:38:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:38:24,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:38:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:38:24,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:38:24,849 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:38:24,851 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:38:26,277 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:38:27,104 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:38:27,104 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:38:27,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:38:27 BoogieIcfgContainer [2022-11-22 01:38:27,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:38:27,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:38:27,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:38:27,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:38:27,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:38:23" (1/3) ... [2022-11-22 01:38:27,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451cff8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:38:27, skipping insertion in model container [2022-11-22 01:38:27,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:24" (2/3) ... [2022-11-22 01:38:27,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451cff8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:38:27, skipping insertion in model container [2022-11-22 01:38:27,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:38:27" (3/3) ... [2022-11-22 01:38:27,123 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2022-11-22 01:38:27,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:38:27,143 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:38:27,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:38:27,235 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;@37474ae5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:38:27,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:38:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-22 01:38:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 01:38:27,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:27,262 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:38:27,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1811851757, now seen corresponding path program 1 times [2022-11-22 01:38:27,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106020302] [2022-11-22 01:38:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:28,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106020302] [2022-11-22 01:38:28,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106020302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:28,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:28,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:38:28,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851398139] [2022-11-22 01:38:28,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:28,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:38:28,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:38:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:38:28,446 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 01:38:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:29,783 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2022-11-22 01:38:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:38:29,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2022-11-22 01:38:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:29,820 INFO L225 Difference]: With dead ends: 1171 [2022-11-22 01:38:29,820 INFO L226 Difference]: Without dead ends: 762 [2022-11-22 01:38:29,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:38:29,837 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 545 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:29,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 3128 Invalid, 739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:38:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-22 01:38:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2022-11-22 01:38:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 505 states have (on average 1.500990099009901) internal successors, (758), 539 states have internal predecessors, (758), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2022-11-22 01:38:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2022-11-22 01:38:30,009 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2022-11-22 01:38:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:30,010 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2022-11-22 01:38:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 01:38:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2022-11-22 01:38:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 01:38:30,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:30,014 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:38:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:38:30,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash -449226594, now seen corresponding path program 1 times [2022-11-22 01:38:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92995126] [2022-11-22 01:38:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:30,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:30,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92995126] [2022-11-22 01:38:30,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92995126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:30,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:30,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:38:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659000063] [2022-11-22 01:38:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:30,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:30,396 INFO L87 Difference]: Start difference. First operand 754 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:38:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:30,792 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2022-11-22 01:38:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-11-22 01:38:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:30,812 INFO L225 Difference]: With dead ends: 2232 [2022-11-22 01:38:30,812 INFO L226 Difference]: Without dead ends: 1491 [2022-11-22 01:38:30,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:30,824 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 602 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:30,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1317 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:38:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-11-22 01:38:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2022-11-22 01:38:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 979 states have (on average 1.5148110316649643) internal successors, (1483), 1031 states have internal predecessors, (1483), 353 states have call successors, (353), 91 states have call predecessors, (353), 86 states have return successors, (373), 324 states have call predecessors, (373), 347 states have call successors, (373) [2022-11-22 01:38:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2022-11-22 01:38:30,990 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2022-11-22 01:38:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:30,991 INFO L495 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2022-11-22 01:38:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:38:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2022-11-22 01:38:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 01:38:31,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:31,004 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:38:31,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:38:31,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1957902370, now seen corresponding path program 1 times [2022-11-22 01:38:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:31,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2645729] [2022-11-22 01:38:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:31,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:31,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:31,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2645729] [2022-11-22 01:38:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2645729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:31,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:38:31,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274227008] [2022-11-22 01:38:31,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:31,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:38:31,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:31,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:38:31,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:38:31,614 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:38:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:32,750 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2022-11-22 01:38:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:38:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2022-11-22 01:38:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:32,776 INFO L225 Difference]: With dead ends: 3701 [2022-11-22 01:38:32,777 INFO L226 Difference]: Without dead ends: 2294 [2022-11-22 01:38:32,790 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 [2022-11-22 01:38:32,791 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 675 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:32,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 3412 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:38:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-11-22 01:38:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2022-11-22 01:38:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1439 states have (on average 1.507991660875608) internal successors, (2170), 1523 states have internal predecessors, (2170), 512 states have call successors, (512), 135 states have call predecessors, (512), 128 states have return successors, (581), 464 states have call predecessors, (581), 504 states have call successors, (581) [2022-11-22 01:38:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2022-11-22 01:38:32,957 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 86 [2022-11-22 01:38:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:32,958 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2022-11-22 01:38:32,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:38:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2022-11-22 01:38:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 01:38:32,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:32,961 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:38:32,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:38:32,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1338439674, now seen corresponding path program 1 times [2022-11-22 01:38:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:32,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263651892] [2022-11-22 01:38:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:38:33,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263651892] [2022-11-22 01:38:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263651892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655259831] [2022-11-22 01:38:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:33,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:33,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:33,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:38:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:38:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:33,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655259831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:33,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:33,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 01:38:33,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070593070] [2022-11-22 01:38:33,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:38:33,927 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 01:38:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:34,335 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2022-11-22 01:38:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-22 01:38:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:34,374 INFO L225 Difference]: With dead ends: 5950 [2022-11-22 01:38:34,375 INFO L226 Difference]: Without dead ends: 3882 [2022-11-22 01:38:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:38:34,398 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 565 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:34,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1192 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:38:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-11-22 01:38:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2022-11-22 01:38:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 2621 states have (on average 1.5215566577642121) internal successors, (3988), 2791 states have internal predecessors, (3988), 903 states have call successors, (903), 240 states have call predecessors, (903), 239 states have return successors, (1072), 818 states have call predecessors, (1072), 895 states have call successors, (1072) [2022-11-22 01:38:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2022-11-22 01:38:34,687 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 86 [2022-11-22 01:38:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:34,688 INFO L495 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2022-11-22 01:38:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 01:38:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2022-11-22 01:38:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 01:38:34,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:34,694 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:38:34,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-22 01:38:34,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1809689999, now seen corresponding path program 1 times [2022-11-22 01:38:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:34,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088106277] [2022-11-22 01:38:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:38:35,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088106277] [2022-11-22 01:38:35,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088106277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327661796] [2022-11-22 01:38:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:35,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:35,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:35,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:38:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:38:35,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:35,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:35,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327661796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:35,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:35,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 01:38:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231693699] [2022-11-22 01:38:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:35,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:38:35,866 INFO L87 Difference]: Start difference. First operand 3764 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 01:38:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:36,432 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2022-11-22 01:38:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-22 01:38:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:36,475 INFO L225 Difference]: With dead ends: 8443 [2022-11-22 01:38:36,475 INFO L226 Difference]: Without dead ends: 4691 [2022-11-22 01:38:36,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:38:36,504 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 564 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:36,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1230 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:38:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-11-22 01:38:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2022-11-22 01:38:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 3233 states have (on average 1.5310856789359728) internal successors, (4950), 3446 states have internal predecessors, (4950), 1100 states have call successors, (1100), 291 states have call predecessors, (1100), 293 states have return successors, (1306), 998 states have call predecessors, (1306), 1092 states have call successors, (1306) [2022-11-22 01:38:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2022-11-22 01:38:36,889 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 86 [2022-11-22 01:38:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:36,890 INFO L495 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2022-11-22 01:38:36,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 01:38:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2022-11-22 01:38:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 01:38:36,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:36,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:36,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:37,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:37,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash 936344970, now seen corresponding path program 1 times [2022-11-22 01:38:37,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:37,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083128922] [2022-11-22 01:38:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:37,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:37,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:37,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083128922] [2022-11-22 01:38:37,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083128922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:37,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202721980] [2022-11-22 01:38:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:37,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:37,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:37,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:38,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:38:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:38,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:38:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:38,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:38,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202721980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:38,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:38,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-11-22 01:38:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436000609] [2022-11-22 01:38:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:38,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:38:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:38:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:38:38,587 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 01:38:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:39,141 INFO L93 Difference]: Finished difference Result 10083 states and 16056 transitions. [2022-11-22 01:38:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:38:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-22 01:38:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:39,180 INFO L225 Difference]: With dead ends: 10083 [2022-11-22 01:38:39,180 INFO L226 Difference]: Without dead ends: 5468 [2022-11-22 01:38:39,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:38:39,212 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 423 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:39,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1796 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:38:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2022-11-22 01:38:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 5355. [2022-11-22 01:38:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 3739 states have (on average 1.4995988232147632) internal successors, (5607), 3950 states have internal predecessors, (5607), 1238 states have call successors, (1238), 354 states have call predecessors, (1238), 377 states have return successors, (1577), 1156 states have call predecessors, (1577), 1227 states have call successors, (1577) [2022-11-22 01:38:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 8422 transitions. [2022-11-22 01:38:39,689 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 8422 transitions. Word has length 92 [2022-11-22 01:38:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:39,689 INFO L495 AbstractCegarLoop]: Abstraction has 5355 states and 8422 transitions. [2022-11-22 01:38:39,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 01:38:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 8422 transitions. [2022-11-22 01:38:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 01:38:39,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:39,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:39,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 01:38:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:39,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -413851167, now seen corresponding path program 1 times [2022-11-22 01:38:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261445185] [2022-11-22 01:38:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:40,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261445185] [2022-11-22 01:38:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261445185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987148258] [2022-11-22 01:38:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:40,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:40,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:40,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:38:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:41,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:38:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:41,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:41,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987148258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:41,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:41,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-22 01:38:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871117333] [2022-11-22 01:38:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:38:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:38:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:38:41,313 INFO L87 Difference]: Start difference. First operand 5355 states and 8422 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 01:38:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:42,037 INFO L93 Difference]: Finished difference Result 10563 states and 16976 transitions. [2022-11-22 01:38:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:38:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-22 01:38:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:42,098 INFO L225 Difference]: With dead ends: 10563 [2022-11-22 01:38:42,098 INFO L226 Difference]: Without dead ends: 6435 [2022-11-22 01:38:42,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:38:42,126 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 177 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:42,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:38:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6435 states. [2022-11-22 01:38:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6435 to 5400. [2022-11-22 01:38:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 3784 states have (on average 1.4936575052854122) internal successors, (5652), 3995 states have internal predecessors, (5652), 1238 states have call successors, (1238), 354 states have call predecessors, (1238), 377 states have return successors, (1577), 1156 states have call predecessors, (1577), 1227 states have call successors, (1577) [2022-11-22 01:38:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 8467 transitions. [2022-11-22 01:38:42,615 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 8467 transitions. Word has length 92 [2022-11-22 01:38:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:42,616 INFO L495 AbstractCegarLoop]: Abstraction has 5400 states and 8467 transitions. [2022-11-22 01:38:42,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 01:38:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 8467 transitions. [2022-11-22 01:38:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 01:38:42,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:42,621 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:42,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:42,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:42,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1470715232, now seen corresponding path program 1 times [2022-11-22 01:38:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:42,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643233383] [2022-11-22 01:38:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:38:43,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643233383] [2022-11-22 01:38:43,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643233383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604363337] [2022-11-22 01:38:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:43,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:43,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:38:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:38:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:44,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:38:44,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604363337] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:44,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:38:44,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2022-11-22 01:38:44,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168776790] [2022-11-22 01:38:44,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:44,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:38:44,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:38:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:38:44,911 INFO L87 Difference]: Start difference. First operand 5400 states and 8467 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-22 01:38:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:48,383 INFO L93 Difference]: Finished difference Result 10625 states and 16858 transitions. [2022-11-22 01:38:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:38:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 95 [2022-11-22 01:38:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:48,445 INFO L225 Difference]: With dead ends: 10625 [2022-11-22 01:38:48,445 INFO L226 Difference]: Without dead ends: 6476 [2022-11-22 01:38:48,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-11-22 01:38:48,477 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 1261 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 2493 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:48,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1348 Valid, 2493 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 01:38:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2022-11-22 01:38:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 5601. [2022-11-22 01:38:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 3908 states have (on average 1.4820880245649948) internal successors, (5792), 4119 states have internal predecessors, (5792), 1276 states have call successors, (1276), 360 states have call predecessors, (1276), 416 states have return successors, (1722), 1224 states have call predecessors, (1722), 1265 states have call successors, (1722) [2022-11-22 01:38:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 8790 transitions. [2022-11-22 01:38:49,079 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 8790 transitions. Word has length 95 [2022-11-22 01:38:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:49,081 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 8790 transitions. [2022-11-22 01:38:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-22 01:38:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 8790 transitions. [2022-11-22 01:38:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 01:38:49,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:49,086 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:38:49,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:38:49,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 80209181, now seen corresponding path program 1 times [2022-11-22 01:38:49,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:49,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864971539] [2022-11-22 01:38:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:49,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:38:49,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864971539] [2022-11-22 01:38:49,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864971539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282285944] [2022-11-22 01:38:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:49,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:49,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:38:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:50,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:38:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:38:50,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:38:51,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282285944] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:51,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:38:51,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-11-22 01:38:51,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210034322] [2022-11-22 01:38:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:51,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:38:51,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:38:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:38:51,267 INFO L87 Difference]: Start difference. First operand 5601 states and 8790 transitions. Second operand has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-22 01:38:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:56,782 INFO L93 Difference]: Finished difference Result 16125 states and 27823 transitions. [2022-11-22 01:38:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:38:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-22 01:38:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:56,881 INFO L225 Difference]: With dead ends: 16125 [2022-11-22 01:38:56,882 INFO L226 Difference]: Without dead ends: 12378 [2022-11-22 01:38:56,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:38:56,926 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 3175 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 1533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3273 SdHoareTripleChecker+Valid, 3258 SdHoareTripleChecker+Invalid, 4634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1533 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:56,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3273 Valid, 3258 Invalid, 4634 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1533 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-22 01:38:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12378 states. [2022-11-22 01:38:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12378 to 10919. [2022-11-22 01:38:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10919 states, 7728 states have (on average 1.4887422360248448) internal successors, (11505), 8079 states have internal predecessors, (11505), 2354 states have call successors, (2354), 684 states have call predecessors, (2354), 836 states have return successors, (3983), 2315 states have call predecessors, (3983), 2337 states have call successors, (3983) [2022-11-22 01:38:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10919 states to 10919 states and 17842 transitions. [2022-11-22 01:38:58,585 INFO L78 Accepts]: Start accepts. Automaton has 10919 states and 17842 transitions. Word has length 97 [2022-11-22 01:38:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:58,586 INFO L495 AbstractCegarLoop]: Abstraction has 10919 states and 17842 transitions. [2022-11-22 01:38:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-22 01:38:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 10919 states and 17842 transitions. [2022-11-22 01:38:58,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-22 01:38:58,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:58,592 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:38:58,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:58,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 227585040, now seen corresponding path program 1 times [2022-11-22 01:38:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:58,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076307280] [2022-11-22 01:38:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:38:59,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076307280] [2022-11-22 01:38:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076307280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997852263] [2022-11-22 01:38:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:59,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:59,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:59,499 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:59,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:38:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:38:59,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:39:00,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:39:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:39:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997852263] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:00,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:39:00,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-11-22 01:39:00,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003113478] [2022-11-22 01:39:00,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:00,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:00,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:39:00,466 INFO L87 Difference]: Start difference. First operand 10919 states and 17842 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-22 01:39:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:03,474 INFO L93 Difference]: Finished difference Result 21469 states and 35624 transitions. [2022-11-22 01:39:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:39:03,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-11-22 01:39:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:03,579 INFO L225 Difference]: With dead ends: 21469 [2022-11-22 01:39:03,579 INFO L226 Difference]: Without dead ends: 12404 [2022-11-22 01:39:03,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:39:03,642 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 1223 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:03,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 2115 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 01:39:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2022-11-22 01:39:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 10907. [2022-11-22 01:39:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10907 states, 7728 states have (on average 1.4887422360248448) internal successors, (11505), 8067 states have internal predecessors, (11505), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 836 states have return successors, (3947), 2315 states have call predecessors, (3947), 2325 states have call successors, (3947) [2022-11-22 01:39:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10907 states to 10907 states and 17794 transitions. [2022-11-22 01:39:04,882 INFO L78 Accepts]: Start accepts. Automaton has 10907 states and 17794 transitions. Word has length 102 [2022-11-22 01:39:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:04,883 INFO L495 AbstractCegarLoop]: Abstraction has 10907 states and 17794 transitions. [2022-11-22 01:39:04,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-22 01:39:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 10907 states and 17794 transitions. [2022-11-22 01:39:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-22 01:39:04,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:04,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:04,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:39:05,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 747279465, now seen corresponding path program 1 times [2022-11-22 01:39:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:05,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861431327] [2022-11-22 01:39:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:39:05,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861431327] [2022-11-22 01:39:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861431327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:05,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581776792] [2022-11-22 01:39:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:05,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:05,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:05,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:39:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:06,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:39:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:39:06,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:06,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581776792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:06,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:06,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-22 01:39:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013096508] [2022-11-22 01:39:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:39:06,468 INFO L87 Difference]: Start difference. First operand 10907 states and 17794 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 01:39:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:07,704 INFO L93 Difference]: Finished difference Result 21001 states and 35495 transitions. [2022-11-22 01:39:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2022-11-22 01:39:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:07,797 INFO L225 Difference]: With dead ends: 21001 [2022-11-22 01:39:07,797 INFO L226 Difference]: Without dead ends: 11363 [2022-11-22 01:39:07,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:39:07,866 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 2 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:07,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3594 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:39:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11363 states. [2022-11-22 01:39:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11363 to 11237. [2022-11-22 01:39:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11237 states, 7950 states have (on average 1.4750943396226415) internal successors, (11727), 8313 states have internal predecessors, (11727), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2399 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-22 01:39:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11237 states to 11237 states and 18700 transitions. [2022-11-22 01:39:08,857 INFO L78 Accepts]: Start accepts. Automaton has 11237 states and 18700 transitions. Word has length 131 [2022-11-22 01:39:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:08,858 INFO L495 AbstractCegarLoop]: Abstraction has 11237 states and 18700 transitions. [2022-11-22 01:39:08,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 01:39:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11237 states and 18700 transitions. [2022-11-22 01:39:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-22 01:39:08,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:08,864 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:08,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:09,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:39:09,072 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash 766778024, now seen corresponding path program 1 times [2022-11-22 01:39:09,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:09,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820202831] [2022-11-22 01:39:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:39:09,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:09,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820202831] [2022-11-22 01:39:09,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820202831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:09,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910189810] [2022-11-22 01:39:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:09,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:09,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:09,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:39:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:10,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:39:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:39:10,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:10,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910189810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:10,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:10,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-22 01:39:10,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564481989] [2022-11-22 01:39:10,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:10,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:10,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:39:10,284 INFO L87 Difference]: Start difference. First operand 11237 states and 18700 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 01:39:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:11,283 INFO L93 Difference]: Finished difference Result 21541 states and 36855 transitions. [2022-11-22 01:39:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 128 [2022-11-22 01:39:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:11,361 INFO L225 Difference]: With dead ends: 21541 [2022-11-22 01:39:11,362 INFO L226 Difference]: Without dead ends: 11585 [2022-11-22 01:39:11,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:39:11,420 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 2 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:11,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3583 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:39:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2022-11-22 01:39:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 11291. [2022-11-22 01:39:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11291 states, 8004 states have (on average 1.471889055472264) internal successors, (11781), 8313 states have internal predecessors, (11781), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2453 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-22 01:39:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11291 states to 11291 states and 18754 transitions. [2022-11-22 01:39:12,277 INFO L78 Accepts]: Start accepts. Automaton has 11291 states and 18754 transitions. Word has length 128 [2022-11-22 01:39:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:12,278 INFO L495 AbstractCegarLoop]: Abstraction has 11291 states and 18754 transitions. [2022-11-22 01:39:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 01:39:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11291 states and 18754 transitions. [2022-11-22 01:39:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 01:39:12,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:12,286 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:12,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:12,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1069538174, now seen corresponding path program 1 times [2022-11-22 01:39:12,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:12,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191143496] [2022-11-22 01:39:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:12,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:39:13,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:13,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191143496] [2022-11-22 01:39:13,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191143496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:13,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162267807] [2022-11-22 01:39:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:13,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:13,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:39:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:39:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:39:13,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:13,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162267807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:13,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:13,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-22 01:39:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689014332] [2022-11-22 01:39:13,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:13,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:13,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:39:13,673 INFO L87 Difference]: Start difference. First operand 11291 states and 18754 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 01:39:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:14,663 INFO L93 Difference]: Finished difference Result 21649 states and 36963 transitions. [2022-11-22 01:39:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 127 [2022-11-22 01:39:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:14,753 INFO L225 Difference]: With dead ends: 21649 [2022-11-22 01:39:14,754 INFO L226 Difference]: Without dead ends: 11639 [2022-11-22 01:39:14,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:39:14,822 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:14,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3614 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:39:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11639 states. [2022-11-22 01:39:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11639 to 11345. [2022-11-22 01:39:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11345 states, 8058 states have (on average 1.4687267311988086) internal successors, (11835), 8313 states have internal predecessors, (11835), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2507 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-22 01:39:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11345 states to 11345 states and 18808 transitions. [2022-11-22 01:39:16,010 INFO L78 Accepts]: Start accepts. Automaton has 11345 states and 18808 transitions. Word has length 127 [2022-11-22 01:39:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:16,010 INFO L495 AbstractCegarLoop]: Abstraction has 11345 states and 18808 transitions. [2022-11-22 01:39:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 01:39:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11345 states and 18808 transitions. [2022-11-22 01:39:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-22 01:39:16,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:16,022 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:16,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:16,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:39:16,230 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash 493118779, now seen corresponding path program 1 times [2022-11-22 01:39:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:16,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825048082] [2022-11-22 01:39:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:39:17,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:17,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825048082] [2022-11-22 01:39:17,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825048082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304436696] [2022-11-22 01:39:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:17,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:17,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:39:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:39:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:39:17,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304436696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:17,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:17,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-22 01:39:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841219815] [2022-11-22 01:39:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:17,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:39:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:39:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:39:17,661 INFO L87 Difference]: Start difference. First operand 11345 states and 18808 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-22 01:39:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:18,653 INFO L93 Difference]: Finished difference Result 23541 states and 40497 transitions. [2022-11-22 01:39:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:39:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 138 [2022-11-22 01:39:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:18,738 INFO L225 Difference]: With dead ends: 23541 [2022-11-22 01:39:18,738 INFO L226 Difference]: Without dead ends: 11072 [2022-11-22 01:39:18,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:39:18,819 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 244 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:18,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2942 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:39:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2022-11-22 01:39:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 11052. [2022-11-22 01:39:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 7831 states have (on average 1.444387689950198) internal successors, (11311), 8088 states have internal predecessors, (11311), 2298 states have call successors, (2298), 678 states have call predecessors, (2298), 922 states have return successors, (4482), 2445 states have call predecessors, (4482), 2281 states have call successors, (4482) [2022-11-22 01:39:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 18091 transitions. [2022-11-22 01:39:19,892 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 18091 transitions. Word has length 138 [2022-11-22 01:39:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:19,893 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 18091 transitions. [2022-11-22 01:39:19,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-22 01:39:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 18091 transitions. [2022-11-22 01:39:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-22 01:39:19,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:19,905 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:19,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:20,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:39:20,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2077154871, now seen corresponding path program 1 times [2022-11-22 01:39:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:20,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114154511] [2022-11-22 01:39:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 01:39:20,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114154511] [2022-11-22 01:39:20,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114154511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792497668] [2022-11-22 01:39:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:20,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:20,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:20,796 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:39:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:21,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1984 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:39:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:39:21,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:21,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792497668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:21,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:21,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-22 01:39:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053166285] [2022-11-22 01:39:21,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:39:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:39:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:39:21,326 INFO L87 Difference]: Start difference. First operand 11052 states and 18091 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 01:39:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:22,587 INFO L93 Difference]: Finished difference Result 23842 states and 40130 transitions. [2022-11-22 01:39:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 160 [2022-11-22 01:39:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:22,689 INFO L225 Difference]: With dead ends: 23842 [2022-11-22 01:39:22,689 INFO L226 Difference]: Without dead ends: 13677 [2022-11-22 01:39:22,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:39:22,765 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 281 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:22,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 2887 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:39:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2022-11-22 01:39:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13677. [2022-11-22 01:39:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13677 states, 10053 states have (on average 1.4727941907888193) internal successors, (14806), 10391 states have internal predecessors, (14806), 2578 states have call successors, (2578), 720 states have call predecessors, (2578), 1045 states have return successors, (4762), 2725 states have call predecessors, (4762), 2561 states have call successors, (4762) [2022-11-22 01:39:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13677 states to 13677 states and 22146 transitions. [2022-11-22 01:39:23,841 INFO L78 Accepts]: Start accepts. Automaton has 13677 states and 22146 transitions. Word has length 160 [2022-11-22 01:39:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:23,842 INFO L495 AbstractCegarLoop]: Abstraction has 13677 states and 22146 transitions. [2022-11-22 01:39:23,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 01:39:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13677 states and 22146 transitions. [2022-11-22 01:39:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-22 01:39:23,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:23,855 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:23,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:24,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:39:24,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -414517556, now seen corresponding path program 1 times [2022-11-22 01:39:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502389456] [2022-11-22 01:39:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:24,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:39:24,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502389456] [2022-11-22 01:39:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502389456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884397238] [2022-11-22 01:39:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:24,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:24,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:24,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:39:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:39:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:39:25,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:25,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884397238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:25,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:25,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-22 01:39:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241938819] [2022-11-22 01:39:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:39:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:39:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:39:25,447 INFO L87 Difference]: Start difference. First operand 13677 states and 22146 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-22 01:39:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:27,737 INFO L93 Difference]: Finished difference Result 36088 states and 62057 transitions. [2022-11-22 01:39:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-22 01:39:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:27,929 INFO L225 Difference]: With dead ends: 36088 [2022-11-22 01:39:27,929 INFO L226 Difference]: Without dead ends: 22343 [2022-11-22 01:39:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:39:28,047 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 626 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:28,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 3452 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:39:28,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-11-22 01:39:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 21026. [2022-11-22 01:39:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21026 states, 15450 states have (on average 1.4659546925566342) internal successors, (22649), 16015 states have internal predecessors, (22649), 3932 states have call successors, (3932), 1133 states have call predecessors, (3932), 1643 states have return successors, (8398), 4136 states have call predecessors, (8398), 3910 states have call successors, (8398) [2022-11-22 01:39:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21026 states to 21026 states and 34979 transitions. [2022-11-22 01:39:30,050 INFO L78 Accepts]: Start accepts. Automaton has 21026 states and 34979 transitions. Word has length 146 [2022-11-22 01:39:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:30,051 INFO L495 AbstractCegarLoop]: Abstraction has 21026 states and 34979 transitions. [2022-11-22 01:39:30,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-22 01:39:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21026 states and 34979 transitions. [2022-11-22 01:39:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-22 01:39:30,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:30,066 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:30,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:30,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:39:30,275 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash -415345974, now seen corresponding path program 1 times [2022-11-22 01:39:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:30,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613810894] [2022-11-22 01:39:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:39:30,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613810894] [2022-11-22 01:39:30,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613810894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994869915] [2022-11-22 01:39:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:30,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:30,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:39:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:31,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 01:39:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:39:31,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:31,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994869915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:31,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:31,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-11-22 01:39:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298352482] [2022-11-22 01:39:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:31,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:39:31,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:39:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:39:31,893 INFO L87 Difference]: Start difference. First operand 21026 states and 34979 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2022-11-22 01:39:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:34,465 INFO L93 Difference]: Finished difference Result 48190 states and 81381 transitions. [2022-11-22 01:39:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 152 [2022-11-22 01:39:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:34,626 INFO L225 Difference]: With dead ends: 48190 [2022-11-22 01:39:34,626 INFO L226 Difference]: Without dead ends: 27176 [2022-11-22 01:39:34,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:39:34,768 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 582 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:34,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 3464 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27176 states. [2022-11-22 01:39:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27176 to 25768. [2022-11-22 01:39:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25768 states, 18963 states have (on average 1.4587354321573591) internal successors, (27662), 19671 states have internal predecessors, (27662), 4808 states have call successors, (4808), 1369 states have call predecessors, (4808), 1996 states have return successors, (9852), 5043 states have call predecessors, (9852), 4782 states have call successors, (9852) [2022-11-22 01:39:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25768 states to 25768 states and 42322 transitions. [2022-11-22 01:39:36,855 INFO L78 Accepts]: Start accepts. Automaton has 25768 states and 42322 transitions. Word has length 152 [2022-11-22 01:39:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:36,855 INFO L495 AbstractCegarLoop]: Abstraction has 25768 states and 42322 transitions. [2022-11-22 01:39:36,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2022-11-22 01:39:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25768 states and 42322 transitions. [2022-11-22 01:39:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-22 01:39:36,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:36,872 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:36,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:39:37,081 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2077438142, now seen corresponding path program 1 times [2022-11-22 01:39:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646519406] [2022-11-22 01:39:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:37,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 01:39:37,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:37,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646519406] [2022-11-22 01:39:37,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646519406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:37,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169636165] [2022-11-22 01:39:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:37,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:37,881 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:37,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:39:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 01:39:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 01:39:38,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:38,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169636165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:38,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:38,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-11-22 01:39:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987460998] [2022-11-22 01:39:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:39:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:39:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:39:38,823 INFO L87 Difference]: Start difference. First operand 25768 states and 42322 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-22 01:39:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:41,925 INFO L93 Difference]: Finished difference Result 52036 states and 87252 transitions. [2022-11-22 01:39:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:39:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 158 [2022-11-22 01:39:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:42,109 INFO L225 Difference]: With dead ends: 52036 [2022-11-22 01:39:42,109 INFO L226 Difference]: Without dead ends: 26280 [2022-11-22 01:39:42,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:39:42,228 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 564 mSDsluCounter, 2656 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:42,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 3418 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26280 states. [2022-11-22 01:39:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26280 to 24840. [2022-11-22 01:39:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24840 states, 18301 states have (on average 1.458007759138845) internal successors, (26683), 18980 states have internal predecessors, (26683), 4640 states have call successors, (4640), 1328 states have call predecessors, (4640), 1898 states have return successors, (9411), 4839 states have call predecessors, (9411), 4614 states have call successors, (9411) [2022-11-22 01:39:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24840 states to 24840 states and 40734 transitions. [2022-11-22 01:39:44,549 INFO L78 Accepts]: Start accepts. Automaton has 24840 states and 40734 transitions. Word has length 158 [2022-11-22 01:39:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:44,550 INFO L495 AbstractCegarLoop]: Abstraction has 24840 states and 40734 transitions. [2022-11-22 01:39:44,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-22 01:39:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 24840 states and 40734 transitions. [2022-11-22 01:39:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-22 01:39:44,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:44,559 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:44,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:44,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:39:44,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2094359317, now seen corresponding path program 1 times [2022-11-22 01:39:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:44,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888546020] [2022-11-22 01:39:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-22 01:39:45,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888546020] [2022-11-22 01:39:45,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888546020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906602602] [2022-11-22 01:39:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:45,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:45,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:45,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:39:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:39:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:39:45,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:45,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906602602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:45,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:45,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-22 01:39:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132525364] [2022-11-22 01:39:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:45,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:39:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:39:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:39:45,756 INFO L87 Difference]: Start difference. First operand 24840 states and 40734 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-22 01:39:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:50,755 INFO L93 Difference]: Finished difference Result 53519 states and 89064 transitions. [2022-11-22 01:39:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:39:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 150 [2022-11-22 01:39:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:51,117 INFO L225 Difference]: With dead ends: 53519 [2022-11-22 01:39:51,117 INFO L226 Difference]: Without dead ends: 28581 [2022-11-22 01:39:51,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:39:51,261 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 1193 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 3407 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 3905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 3407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 1534 Invalid, 3905 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [498 Valid, 3407 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 01:39:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28581 states. [2022-11-22 01:39:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28581 to 24815. [2022-11-22 01:39:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24815 states, 18276 states have (on average 1.4583606916174217) internal successors, (26653), 18955 states have internal predecessors, (26653), 4640 states have call successors, (4640), 1328 states have call predecessors, (4640), 1898 states have return successors, (9411), 4839 states have call predecessors, (9411), 4614 states have call successors, (9411) [2022-11-22 01:39:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24815 states to 24815 states and 40704 transitions. [2022-11-22 01:39:53,485 INFO L78 Accepts]: Start accepts. Automaton has 24815 states and 40704 transitions. Word has length 150 [2022-11-22 01:39:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:53,485 INFO L495 AbstractCegarLoop]: Abstraction has 24815 states and 40704 transitions. [2022-11-22 01:39:53,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-22 01:39:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24815 states and 40704 transitions. [2022-11-22 01:39:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-22 01:39:53,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:53,494 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 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] [2022-11-22 01:39:53,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:53,695 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1782533, now seen corresponding path program 1 times [2022-11-22 01:39:53,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:53,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591809467] [2022-11-22 01:39:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:53,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-22 01:39:55,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591809467] [2022-11-22 01:39:55,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591809467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441277734] [2022-11-22 01:39:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:55,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:55,416 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:55,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6236bb2-c056-4482-9dce-bca4c872b68f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:39:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:39:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 01:39:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:39:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-22 01:39:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441277734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:39:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501234038] [2022-11-22 01:39:56,544 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-11-22 01:39:56,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:39:56,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:39:56,555 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:39:56,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:05,910 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs