./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh --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 8eb51bb6f9c94e581d6ba21c25f6021e38364df0ee9c7b7b096e4c3b9d6ac008 --- 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-2329fc7 [2022-12-14 16:11:10,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:11:10,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:11:10,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:11:10,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:11:10,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:11:10,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:11:10,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:11:10,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:11:10,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:11:10,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:11:10,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:11:10,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:11:10,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:11:10,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:11:10,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:11:10,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:11:10,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:11:10,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:11:10,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:11:10,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:11:10,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:11:10,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:11:10,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:11:10,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:11:10,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:11:10,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:11:10,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:11:10,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:11:10,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:11:10,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:11:10,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:11:10,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:11:10,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:11:10,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:11:10,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:11:10,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:11:10,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:11:10,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:11:10,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:11:10,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:11:10,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:11:10,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:11:10,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:11:10,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:11:10,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:11:10,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:11:10,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:11:10,499 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:11:10,499 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:11:10,499 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:11:10,499 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:11:10,499 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:11:10,500 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:11:10,500 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:11:10,500 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:11:10,500 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:11:10,500 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:11:10,501 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:11:10,501 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:11:10,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:11:10,501 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:11:10,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:11:10,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:11:10,503 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:11:10,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:11:10,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:11:10,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:11:10,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:11:10,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:11:10,504 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:11:10,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:11:10,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:11:10,515 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:11:10,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:11:10,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:11:10,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:11:10,515 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_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eb51bb6f9c94e581d6ba21c25f6021e38364df0ee9c7b7b096e4c3b9d6ac008 [2022-12-14 16:11:10,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:11:10,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:11:10,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:11:10,726 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:11:10,726 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:11:10,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 16:11:13,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:11:13,554 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:11:13,555 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 16:11:13,567 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/data/b5bf2470d/e8973c5cc6c94f8d923f551665d2c6a0/FLAG7c54c769b [2022-12-14 16:11:13,976 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/data/b5bf2470d/e8973c5cc6c94f8d923f551665d2c6a0 [2022-12-14 16:11:13,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:11:13,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:11:13,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:11:13,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:11:13,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:11:13,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:11:13" (1/1) ... [2022-12-14 16:11:13,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7634442e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:13, skipping insertion in model container [2022-12-14 16:11:13,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:11:13" (1/1) ... [2022-12-14 16:11:13,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:11:14,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:11:14,200 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_5dfc2924-012e-47eb-a7d5-07164ec121d7/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2022-12-14 16:11:14,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:11:14,248 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:11:14,296 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_5dfc2924-012e-47eb-a7d5-07164ec121d7/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2022-12-14 16:11:14,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:11:14,334 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:11:14,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14 WrapperNode [2022-12-14 16:11:14,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:11:14,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:11:14,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:11:14,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:11:14,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,392 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 635 [2022-12-14 16:11:14,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:11:14,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:11:14,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:11:14,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:11:14,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,423 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:11:14,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:11:14,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:11:14,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:11:14,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (1/1) ... [2022-12-14 16:11:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:11:14,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:14,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:11:14,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:11:14,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:11:14,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:11:14,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:11:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:11:14,592 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:11:14,593 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:11:14,989 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:11:15,257 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:11:15,257 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 16:11:15,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:11:15 BoogieIcfgContainer [2022-12-14 16:11:15,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:11:15,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:11:15,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:11:15,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:11:15,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:11:13" (1/3) ... [2022-12-14 16:11:15,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1833dee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:11:15, skipping insertion in model container [2022-12-14 16:11:15,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:11:14" (2/3) ... [2022-12-14 16:11:15,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1833dee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:11:15, skipping insertion in model container [2022-12-14 16:11:15,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:11:15" (3/3) ... [2022-12-14 16:11:15,268 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 16:11:15,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:11:15,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:11:15,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:11:15,339 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;@55b44fb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:11:15,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:11:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 103 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 16:11:15,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:15,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:15,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:15,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1548564430, now seen corresponding path program 1 times [2022-12-14 16:11:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:15,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799356311] [2022-12-14 16:11:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:15,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:15,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799356311] [2022-12-14 16:11:15,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799356311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:15,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:15,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744636222] [2022-12-14 16:11:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:15,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:15,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:15,680 INFO L87 Difference]: Start difference. First operand has 104 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 103 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:15,772 INFO L93 Difference]: Finished difference Result 234 states and 361 transitions. [2022-12-14 16:11:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 16:11:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:15,784 INFO L225 Difference]: With dead ends: 234 [2022-12-14 16:11:15,784 INFO L226 Difference]: Without dead ends: 146 [2022-12-14 16:11:15,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:15,789 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 109 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 363 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-14 16:11:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-12-14 16:11:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4335664335664335) internal successors, (205), 143 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 205 transitions. [2022-12-14 16:11:15,840 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 205 transitions. Word has length 43 [2022-12-14 16:11:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:15,841 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 205 transitions. [2022-12-14 16:11:15,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 205 transitions. [2022-12-14 16:11:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 16:11:15,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:15,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:11:15,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 264224123, now seen corresponding path program 1 times [2022-12-14 16:11:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594890421] [2022-12-14 16:11:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:15,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594890421] [2022-12-14 16:11:15,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594890421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:15,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:15,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:15,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912188026] [2022-12-14 16:11:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:15,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:15,987 INFO L87 Difference]: Start difference. First operand 144 states and 205 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:16,059 INFO L93 Difference]: Finished difference Result 321 states and 478 transitions. [2022-12-14 16:11:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 16:11:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:16,062 INFO L225 Difference]: With dead ends: 321 [2022-12-14 16:11:16,062 INFO L226 Difference]: Without dead ends: 209 [2022-12-14 16:11:16,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,064 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 91 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:16,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 215 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-12-14 16:11:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-12-14 16:11:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4563106796116505) internal successors, (300), 206 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 300 transitions. [2022-12-14 16:11:16,089 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 300 transitions. Word has length 45 [2022-12-14 16:11:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:16,089 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 300 transitions. [2022-12-14 16:11:16,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 300 transitions. [2022-12-14 16:11:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 16:11:16,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:16,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:16,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 16:11:16,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash 776035132, now seen corresponding path program 1 times [2022-12-14 16:11:16,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143854753] [2022-12-14 16:11:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:16,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:16,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143854753] [2022-12-14 16:11:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143854753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:16,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:16,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718953677] [2022-12-14 16:11:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:16,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:16,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,176 INFO L87 Difference]: Start difference. First operand 207 states and 300 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:16,230 INFO L93 Difference]: Finished difference Result 511 states and 763 transitions. [2022-12-14 16:11:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 16:11:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:16,233 INFO L225 Difference]: With dead ends: 511 [2022-12-14 16:11:16,233 INFO L226 Difference]: Without dead ends: 338 [2022-12-14 16:11:16,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,235 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 90 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:16,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-14 16:11:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-12-14 16:11:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.471641791044776) internal successors, (493), 335 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 493 transitions. [2022-12-14 16:11:16,269 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 493 transitions. Word has length 47 [2022-12-14 16:11:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:16,270 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 493 transitions. [2022-12-14 16:11:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 493 transitions. [2022-12-14 16:11:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 16:11:16,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:16,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:16,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 16:11:16,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2087634640, now seen corresponding path program 1 times [2022-12-14 16:11:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614526674] [2022-12-14 16:11:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:16,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614526674] [2022-12-14 16:11:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614526674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:16,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:16,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116762369] [2022-12-14 16:11:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,371 INFO L87 Difference]: Start difference. First operand 336 states and 493 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:16,444 INFO L93 Difference]: Finished difference Result 827 states and 1242 transitions. [2022-12-14 16:11:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 16:11:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:16,448 INFO L225 Difference]: With dead ends: 827 [2022-12-14 16:11:16,448 INFO L226 Difference]: Without dead ends: 525 [2022-12-14 16:11:16,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,451 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 89 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:16,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 232 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-12-14 16:11:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 523. [2022-12-14 16:11:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4923371647509578) internal successors, (779), 522 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 779 transitions. [2022-12-14 16:11:16,486 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 779 transitions. Word has length 49 [2022-12-14 16:11:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:16,486 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 779 transitions. [2022-12-14 16:11:16,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 779 transitions. [2022-12-14 16:11:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 16:11:16,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:16,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:16,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 16:11:16,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash 267956977, now seen corresponding path program 1 times [2022-12-14 16:11:16,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:16,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57940565] [2022-12-14 16:11:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:16,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57940565] [2022-12-14 16:11:16,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57940565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:16,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:16,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243902042] [2022-12-14 16:11:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:16,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:16,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,549 INFO L87 Difference]: Start difference. First operand 523 states and 779 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:16,627 INFO L93 Difference]: Finished difference Result 1343 states and 2014 transitions. [2022-12-14 16:11:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 16:11:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:16,630 INFO L225 Difference]: With dead ends: 1343 [2022-12-14 16:11:16,630 INFO L226 Difference]: Without dead ends: 870 [2022-12-14 16:11:16,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,632 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:16,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-12-14 16:11:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 868. [2022-12-14 16:11:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.4798154555940024) internal successors, (1283), 867 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1283 transitions. [2022-12-14 16:11:16,723 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1283 transitions. Word has length 51 [2022-12-14 16:11:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:16,724 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1283 transitions. [2022-12-14 16:11:16,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1283 transitions. [2022-12-14 16:11:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 16:11:16,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:16,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:16,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 16:11:16,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1173432233, now seen corresponding path program 1 times [2022-12-14 16:11:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120209023] [2022-12-14 16:11:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:16,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:16,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:16,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120209023] [2022-12-14 16:11:16,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120209023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:16,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:16,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882484012] [2022-12-14 16:11:16,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:16,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:16,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,808 INFO L87 Difference]: Start difference. First operand 868 states and 1283 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:16,929 INFO L93 Difference]: Finished difference Result 2175 states and 3253 transitions. [2022-12-14 16:11:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:16,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-12-14 16:11:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:16,933 INFO L225 Difference]: With dead ends: 2175 [2022-12-14 16:11:16,933 INFO L226 Difference]: Without dead ends: 1357 [2022-12-14 16:11:16,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:16,935 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 83 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:16,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-12-14 16:11:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1355. [2022-12-14 16:11:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 1.4903988183161005) internal successors, (2018), 1354 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2018 transitions. [2022-12-14 16:11:17,033 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2018 transitions. Word has length 53 [2022-12-14 16:11:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:17,034 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 2018 transitions. [2022-12-14 16:11:17,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2018 transitions. [2022-12-14 16:11:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 16:11:17,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:17,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:17,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 16:11:17,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2007570392, now seen corresponding path program 1 times [2022-12-14 16:11:17,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:17,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822805852] [2022-12-14 16:11:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:17,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:17,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:17,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822805852] [2022-12-14 16:11:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822805852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:17,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:17,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 16:11:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139464063] [2022-12-14 16:11:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:11:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:11:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:11:17,135 INFO L87 Difference]: Start difference. First operand 1355 states and 2018 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:17,412 INFO L93 Difference]: Finished difference Result 3443 states and 5162 transitions. [2022-12-14 16:11:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:11:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 16:11:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:17,419 INFO L225 Difference]: With dead ends: 3443 [2022-12-14 16:11:17,419 INFO L226 Difference]: Without dead ends: 2136 [2022-12-14 16:11:17,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:11:17,421 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 525 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:17,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 954 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:11:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2022-12-14 16:11:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2110. [2022-12-14 16:11:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 1.498814604077762) internal successors, (3161), 2109 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 3161 transitions. [2022-12-14 16:11:17,530 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 3161 transitions. Word has length 55 [2022-12-14 16:11:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:17,530 INFO L495 AbstractCegarLoop]: Abstraction has 2110 states and 3161 transitions. [2022-12-14 16:11:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 3161 transitions. [2022-12-14 16:11:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 16:11:17,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:17,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:17,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 16:11:17,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2042635835, now seen corresponding path program 1 times [2022-12-14 16:11:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:17,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652737904] [2022-12-14 16:11:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:17,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:17,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652737904] [2022-12-14 16:11:17,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652737904] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:17,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:17,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:11:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029253693] [2022-12-14 16:11:17,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:17,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:11:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:11:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:11:17,610 INFO L87 Difference]: Start difference. First operand 2110 states and 3161 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:17,827 INFO L93 Difference]: Finished difference Result 4156 states and 6241 transitions. [2022-12-14 16:11:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:11:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 16:11:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:17,836 INFO L225 Difference]: With dead ends: 4156 [2022-12-14 16:11:17,836 INFO L226 Difference]: Without dead ends: 2112 [2022-12-14 16:11:17,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:11:17,841 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 174 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:17,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 342 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-12-14 16:11:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2107. [2022-12-14 16:11:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 1.4938271604938271) internal successors, (3146), 2106 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3146 transitions. [2022-12-14 16:11:17,950 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3146 transitions. Word has length 56 [2022-12-14 16:11:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:17,950 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 3146 transitions. [2022-12-14 16:11:17,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3146 transitions. [2022-12-14 16:11:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 16:11:17,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:17,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:17,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 16:11:17,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -728407056, now seen corresponding path program 1 times [2022-12-14 16:11:17,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:17,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467794685] [2022-12-14 16:11:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:18,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:18,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467794685] [2022-12-14 16:11:18,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467794685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:18,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:18,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 16:11:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388849030] [2022-12-14 16:11:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:18,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:11:18,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:11:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:11:18,119 INFO L87 Difference]: Start difference. First operand 2107 states and 3146 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:18,497 INFO L93 Difference]: Finished difference Result 3440 states and 5082 transitions. [2022-12-14 16:11:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:11:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-14 16:11:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:18,509 INFO L225 Difference]: With dead ends: 3440 [2022-12-14 16:11:18,509 INFO L226 Difference]: Without dead ends: 3438 [2022-12-14 16:11:18,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:11:18,511 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 176 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:18,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 674 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2022-12-14 16:11:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 2151. [2022-12-14 16:11:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 1.4730232558139535) internal successors, (3167), 2150 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3167 transitions. [2022-12-14 16:11:18,756 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3167 transitions. Word has length 64 [2022-12-14 16:11:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:18,756 INFO L495 AbstractCegarLoop]: Abstraction has 2151 states and 3167 transitions. [2022-12-14 16:11:18,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3167 transitions. [2022-12-14 16:11:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 16:11:18,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:18,757 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:11:18,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 16:11:18,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1206266662, now seen corresponding path program 1 times [2022-12-14 16:11:18,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:18,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486351024] [2022-12-14 16:11:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:11:19,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:19,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486351024] [2022-12-14 16:11:19,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486351024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:19,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472645078] [2022-12-14 16:11:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:19,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:19,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:19,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:19,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:11:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:11:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:11:19,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:11:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472645078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:19,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:11:19,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 16:11:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216333196] [2022-12-14 16:11:19,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:19,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:11:19,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:11:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:11:19,965 INFO L87 Difference]: Start difference. First operand 2151 states and 3167 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:20,625 INFO L93 Difference]: Finished difference Result 6196 states and 9137 transitions. [2022-12-14 16:11:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:11:20,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-14 16:11:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:20,650 INFO L225 Difference]: With dead ends: 6196 [2022-12-14 16:11:20,650 INFO L226 Difference]: Without dead ends: 4111 [2022-12-14 16:11:20,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 16:11:20,655 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 299 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:20,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 320 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2022-12-14 16:11:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4109. [2022-12-14 16:11:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 1.4668938656280428) internal successors, (6026), 4108 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 6026 transitions. [2022-12-14 16:11:21,243 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 6026 transitions. Word has length 74 [2022-12-14 16:11:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:21,243 INFO L495 AbstractCegarLoop]: Abstraction has 4109 states and 6026 transitions. [2022-12-14 16:11:21,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 6026 transitions. [2022-12-14 16:11:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 16:11:21,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:21,244 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:11:21,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:11:21,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 16:11:21,446 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2066319716, now seen corresponding path program 1 times [2022-12-14 16:11:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:21,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796099811] [2022-12-14 16:11:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:11:21,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796099811] [2022-12-14 16:11:21,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796099811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:21,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:21,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588710461] [2022-12-14 16:11:21,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:21,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:21,609 INFO L87 Difference]: Start difference. First operand 4109 states and 6026 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:22,157 INFO L93 Difference]: Finished difference Result 9491 states and 13964 transitions. [2022-12-14 16:11:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-14 16:11:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:22,168 INFO L225 Difference]: With dead ends: 9491 [2022-12-14 16:11:22,168 INFO L226 Difference]: Without dead ends: 5448 [2022-12-14 16:11:22,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:22,172 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 80 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:22,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 245 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2022-12-14 16:11:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5446. [2022-12-14 16:11:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 1.458953168044077) internal successors, (7944), 5445 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 7944 transitions. [2022-12-14 16:11:22,710 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 7944 transitions. Word has length 75 [2022-12-14 16:11:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:22,710 INFO L495 AbstractCegarLoop]: Abstraction has 5446 states and 7944 transitions. [2022-12-14 16:11:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 7944 transitions. [2022-12-14 16:11:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 16:11:22,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:22,711 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:11:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 16:11:22,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1452528593, now seen corresponding path program 1 times [2022-12-14 16:11:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660402264] [2022-12-14 16:11:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:22,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:11:23,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660402264] [2022-12-14 16:11:23,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660402264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130174563] [2022-12-14 16:11:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:23,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:23,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:23,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:23,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:11:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:23,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:11:23,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:11:24,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:11:24,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130174563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:24,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:11:24,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-12-14 16:11:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772416651] [2022-12-14 16:11:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:24,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:11:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:11:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-12-14 16:11:24,030 INFO L87 Difference]: Start difference. First operand 5446 states and 7944 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:25,371 INFO L93 Difference]: Finished difference Result 15823 states and 23052 transitions. [2022-12-14 16:11:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:11:25,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 16:11:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:25,391 INFO L225 Difference]: With dead ends: 15823 [2022-12-14 16:11:25,391 INFO L226 Difference]: Without dead ends: 10440 [2022-12-14 16:11:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-14 16:11:25,397 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 296 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:25,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 334 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2022-12-14 16:11:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10438. [2022-12-14 16:11:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 10437 states have (on average 1.4474465842675097) internal successors, (15107), 10437 states have internal predecessors, (15107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 15107 transitions. [2022-12-14 16:11:26,611 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 15107 transitions. Word has length 78 [2022-12-14 16:11:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:26,612 INFO L495 AbstractCegarLoop]: Abstraction has 10438 states and 15107 transitions. [2022-12-14 16:11:26,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 15107 transitions. [2022-12-14 16:11:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 16:11:26,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:26,613 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:11:26,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:11:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 16:11:26,814 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:26,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1959006203, now seen corresponding path program 1 times [2022-12-14 16:11:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926973066] [2022-12-14 16:11:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:11:26,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:26,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926973066] [2022-12-14 16:11:26,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926973066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:26,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:26,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941358291] [2022-12-14 16:11:26,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:26,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:26,884 INFO L87 Difference]: Start difference. First operand 10438 states and 15107 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:28,626 INFO L93 Difference]: Finished difference Result 24302 states and 35267 transitions. [2022-12-14 16:11:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-12-14 16:11:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:28,645 INFO L225 Difference]: With dead ends: 24302 [2022-12-14 16:11:28,645 INFO L226 Difference]: Without dead ends: 13922 [2022-12-14 16:11:28,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:28,652 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 86 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:28,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 246 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2022-12-14 16:11:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 13920. [2022-12-14 16:11:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13920 states, 13919 states have (on average 1.4363819239887923) internal successors, (19993), 13919 states have internal predecessors, (19993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13920 states to 13920 states and 19993 transitions. [2022-12-14 16:11:30,682 INFO L78 Accepts]: Start accepts. Automaton has 13920 states and 19993 transitions. Word has length 79 [2022-12-14 16:11:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:30,682 INFO L495 AbstractCegarLoop]: Abstraction has 13920 states and 19993 transitions. [2022-12-14 16:11:30,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 13920 states and 19993 transitions. [2022-12-14 16:11:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 16:11:30,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:30,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 16:11:30,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1563202665, now seen corresponding path program 1 times [2022-12-14 16:11:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745195079] [2022-12-14 16:11:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:11:30,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:30,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745195079] [2022-12-14 16:11:30,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745195079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:30,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:30,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:11:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766151174] [2022-12-14 16:11:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:11:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:11:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:11:30,755 INFO L87 Difference]: Start difference. First operand 13920 states and 19993 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:33,434 INFO L93 Difference]: Finished difference Result 27784 states and 39919 transitions. [2022-12-14 16:11:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:11:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-12-14 16:11:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:33,452 INFO L225 Difference]: With dead ends: 27784 [2022-12-14 16:11:33,452 INFO L226 Difference]: Without dead ends: 13920 [2022-12-14 16:11:33,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:11:33,462 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 321 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:33,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 118 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13920 states. [2022-12-14 16:11:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13920 to 13920. [2022-12-14 16:11:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13920 states, 13919 states have (on average 1.4194266829513615) internal successors, (19757), 13919 states have internal predecessors, (19757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13920 states to 13920 states and 19757 transitions. [2022-12-14 16:11:35,848 INFO L78 Accepts]: Start accepts. Automaton has 13920 states and 19757 transitions. Word has length 82 [2022-12-14 16:11:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:35,848 INFO L495 AbstractCegarLoop]: Abstraction has 13920 states and 19757 transitions. [2022-12-14 16:11:35,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 13920 states and 19757 transitions. [2022-12-14 16:11:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 16:11:35,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:35,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:35,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 16:11:35,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash -77483964, now seen corresponding path program 1 times [2022-12-14 16:11:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:35,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985611075] [2022-12-14 16:11:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:11:36,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985611075] [2022-12-14 16:11:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985611075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906492598] [2022-12-14 16:11:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:36,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:36,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:11:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:36,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:11:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 16:11:36,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:11:36,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906492598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:36,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:11:36,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 16:11:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482499363] [2022-12-14 16:11:36,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:36,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:11:36,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:11:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:11:36,734 INFO L87 Difference]: Start difference. First operand 13920 states and 19757 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:41,122 INFO L93 Difference]: Finished difference Result 40407 states and 57147 transitions. [2022-12-14 16:11:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:11:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-12-14 16:11:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:41,150 INFO L225 Difference]: With dead ends: 40407 [2022-12-14 16:11:41,150 INFO L226 Difference]: Without dead ends: 26534 [2022-12-14 16:11:41,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 16:11:41,161 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 298 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:41,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 326 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26534 states. [2022-12-14 16:11:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26534 to 26532. [2022-12-14 16:11:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26532 states, 26531 states have (on average 1.4017941276242887) internal successors, (37191), 26531 states have internal predecessors, (37191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26532 states to 26532 states and 37191 transitions. [2022-12-14 16:11:45,324 INFO L78 Accepts]: Start accepts. Automaton has 26532 states and 37191 transitions. Word has length 82 [2022-12-14 16:11:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:45,324 INFO L495 AbstractCegarLoop]: Abstraction has 26532 states and 37191 transitions. [2022-12-14 16:11:45,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 26532 states and 37191 transitions. [2022-12-14 16:11:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 16:11:45,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:45,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:45,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:11:45,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:45,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash 15834456, now seen corresponding path program 1 times [2022-12-14 16:11:45,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:45,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065748106] [2022-12-14 16:11:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 16:11:45,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065748106] [2022-12-14 16:11:45,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065748106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:45,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:11:45,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:11:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495310546] [2022-12-14 16:11:45,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:45,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:11:45,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:11:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:45,564 INFO L87 Difference]: Start difference. First operand 26532 states and 37191 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:51,822 INFO L93 Difference]: Finished difference Result 62716 states and 88269 transitions. [2022-12-14 16:11:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:11:51,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-12-14 16:11:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:51,866 INFO L225 Difference]: With dead ends: 62716 [2022-12-14 16:11:51,866 INFO L226 Difference]: Without dead ends: 36226 [2022-12-14 16:11:51,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:11:51,885 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 90 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:51,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 243 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:11:51,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36226 states. [2022-12-14 16:11:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36226 to 36224. [2022-12-14 16:11:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36224 states, 36223 states have (on average 1.3904149297407724) internal successors, (50365), 36223 states have internal predecessors, (50365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36224 states to 36224 states and 50365 transitions. [2022-12-14 16:11:59,154 INFO L78 Accepts]: Start accepts. Automaton has 36224 states and 50365 transitions. Word has length 83 [2022-12-14 16:11:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:59,154 INFO L495 AbstractCegarLoop]: Abstraction has 36224 states and 50365 transitions. [2022-12-14 16:11:59,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 36224 states and 50365 transitions. [2022-12-14 16:11:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 16:11:59,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:59,156 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:11:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 16:11:59,156 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -149086823, now seen corresponding path program 1 times [2022-12-14 16:11:59,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:59,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008391024] [2022-12-14 16:11:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:11:59,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008391024] [2022-12-14 16:11:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008391024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:59,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118010137] [2022-12-14 16:11:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:59,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:59,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:11:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 16:11:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:12:00,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:00,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118010137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:00,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:12:00,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 16:12:00,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596475626] [2022-12-14 16:12:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:00,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:12:00,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:12:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:12:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:12:00,329 INFO L87 Difference]: Start difference. First operand 36224 states and 50365 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:12:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:05,743 INFO L93 Difference]: Finished difference Result 63974 states and 88772 transitions. [2022-12-14 16:12:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:12:05,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-12-14 16:12:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:05,776 INFO L225 Difference]: With dead ends: 63974 [2022-12-14 16:12:05,776 INFO L226 Difference]: Without dead ends: 27841 [2022-12-14 16:12:05,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 16:12:05,798 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 417 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:05,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 252 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:12:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27841 states. [2022-12-14 16:12:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27841 to 27838. [2022-12-14 16:12:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27838 states, 27837 states have (on average 1.3833746452563136) internal successors, (38509), 27837 states have internal predecessors, (38509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:12:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27838 states to 27838 states and 38509 transitions. [2022-12-14 16:12:10,033 INFO L78 Accepts]: Start accepts. Automaton has 27838 states and 38509 transitions. Word has length 86 [2022-12-14 16:12:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:10,034 INFO L495 AbstractCegarLoop]: Abstraction has 27838 states and 38509 transitions. [2022-12-14 16:12:10,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:12:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 27838 states and 38509 transitions. [2022-12-14 16:12:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 16:12:10,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:10,035 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:12:10,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:12:10,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 16:12:10,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:10,238 INFO L85 PathProgramCache]: Analyzing trace with hash -217677866, now seen corresponding path program 1 times [2022-12-14 16:12:10,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:12:10,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908357601] [2022-12-14 16:12:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:12:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:12:10,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:12:10,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908357601] [2022-12-14 16:12:10,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908357601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:12:10,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811540094] [2022-12-14 16:12:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:10,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:10,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:10,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfc2924-012e-47eb-a7d5-07164ec121d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:12:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 16:12:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:12:11,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:17,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811540094] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543742454] [2022-12-14 16:12:17,220 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 16:12:17,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:12:17,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:12:17,226 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:12:17,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:12:18,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:18,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:18,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 16:12:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:12:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:12:18,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 16:12:18,630 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 16:12:24,751 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6