./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P --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 8ff37a6bc6dd9a1cef87b79c0817272bb118995e5e060e5cd0eb428df45ac24f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:16,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:16,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:16,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:16,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:16,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:16,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:16,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:16,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:16,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:16,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:16,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:16,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:16,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:16,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:16,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:16,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:16,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:16,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:16,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:16,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:16,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:16,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:16,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:16,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:16,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:16,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:16,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:16,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:16,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:16,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:16,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:16,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:16,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:16,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:16,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:16,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:16,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:16,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:16,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:16,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:16,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:13:16,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:16,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:16,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:16,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:16,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:16,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:16,487 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:16,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:16,488 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:16,488 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:13:16,488 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:16,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:16,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:13:16,489 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:13:16,489 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:16,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:13:16,489 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:13:16,490 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:13:16,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:16,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:13:16,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:16,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:13:16,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:16,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:13:16,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:16,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:13:16,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:13:16,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:13:16,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:16,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:13:16,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:16,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:16,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:16,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:16,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:16,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:13:16,494 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:13:16,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:13:16,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:13:16,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:16,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:16,495 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ff37a6bc6dd9a1cef87b79c0817272bb118995e5e060e5cd0eb428df45ac24f [2021-11-20 23:13:16,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:16,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:16,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:16,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:16,800 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:16,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-20 23:13:16,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/data/63517ca89/461ddaea42c743a2b0d09ecd8d3104cd/FLAGfe20c1f28 [2021-11-20 23:13:17,670 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:17,672 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-20 23:13:17,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/data/63517ca89/461ddaea42c743a2b0d09ecd8d3104cd/FLAGfe20c1f28 [2021-11-20 23:13:17,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/data/63517ca89/461ddaea42c743a2b0d09ecd8d3104cd [2021-11-20 23:13:17,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:17,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:17,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:17,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:17,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:17,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:17" (1/1) ... [2021-11-20 23:13:17,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315df6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:17, skipping insertion in model container [2021-11-20 23:13:17,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:17" (1/1) ... [2021-11-20 23:13:17,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:17,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:18,758 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[34668,34681] [2021-11-20 23:13:18,792 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[35558,35571] [2021-11-20 23:13:18,850 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[37388,37401] [2021-11-20 23:13:18,874 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[38278,38291] [2021-11-20 23:13:18,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41051,41064] [2021-11-20 23:13:18,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41944,41957] [2021-11-20 23:13:18,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[43777,43790] [2021-11-20 23:13:19,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[45054,45067] [2021-11-20 23:13:19,265 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[60707,60720] [2021-11-20 23:13:19,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[61600,61613] [2021-11-20 23:13:19,336 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[63433,63446] [2021-11-20 23:13:19,415 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[67890,67903] [2021-11-20 23:13:19,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:19,589 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:19,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[34668,34681] [2021-11-20 23:13:19,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[35558,35571] [2021-11-20 23:13:19,992 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[37388,37401] [2021-11-20 23:13:20,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[38278,38291] [2021-11-20 23:13:20,059 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41051,41064] [2021-11-20 23:13:20,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[41944,41957] [2021-11-20 23:13:20,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[43777,43790] [2021-11-20 23:13:20,146 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[45054,45067] [2021-11-20 23:13:20,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[60707,60720] [2021-11-20 23:13:20,377 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[61600,61613] [2021-11-20 23:13:20,413 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[63433,63446] [2021-11-20 23:13:20,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[67890,67903] [2021-11-20 23:13:20,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:20,658 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:20,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20 WrapperNode [2021-11-20 23:13:20,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:20,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:20,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:20,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:20,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,812 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 4116 [2021-11-20 23:13:20,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:20,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:20,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:20,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:20,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:20,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:20,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:20,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:20,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (1/1) ... [2021-11-20 23:13:20,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:21,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a1e48d8-e7f9-4837-b3cf-205bdd0d9f91/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:21,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:13:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:21,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:21,383 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:21,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:24,526 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:25,717 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:25,717 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:13:25,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:25 BoogieIcfgContainer [2021-11-20 23:13:25,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:25,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:25,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:25,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:25,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:17" (1/3) ... [2021-11-20 23:13:25,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415a0ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:25, skipping insertion in model container [2021-11-20 23:13:25,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:20" (2/3) ... [2021-11-20 23:13:25,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415a0ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:25, skipping insertion in model container [2021-11-20 23:13:25,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:25" (3/3) ... [2021-11-20 23:13:25,735 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-20 23:13:25,745 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:25,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-20 23:13:25,827 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:25,838 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:13:25,838 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-20 23:13:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 759 states, 746 states have (on average 1.762734584450402) internal successors, (1315), 758 states have internal predecessors, (1315), 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) [2021-11-20 23:13:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-20 23:13:25,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:25,943 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:25,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:25,950 INFO L85 PathProgramCache]: Analyzing trace with hash -806074267, now seen corresponding path program 1 times [2021-11-20 23:13:25,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:25,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824350944] [2021-11-20 23:13:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:25,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:27,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824350944] [2021-11-20 23:13:27,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824350944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:27,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:27,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:27,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111666220] [2021-11-20 23:13:27,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:27,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:27,445 INFO L87 Difference]: Start difference. First operand has 759 states, 746 states have (on average 1.762734584450402) internal successors, (1315), 758 states have internal predecessors, (1315), 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 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-20 23:13:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:28,134 INFO L93 Difference]: Finished difference Result 2241 states and 3886 transitions. [2021-11-20 23:13:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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 259 [2021-11-20 23:13:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:28,170 INFO L225 Difference]: With dead ends: 2241 [2021-11-20 23:13:28,171 INFO L226 Difference]: Without dead ends: 1487 [2021-11-20 23:13:28,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:28,189 INFO L933 BasicCegarLoop]: 1988 mSDtfsCounter, 2955 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2955 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:28,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2955 Valid, 3175 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:13:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-11-20 23:13:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1421. [2021-11-20 23:13:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1409 states have (on average 1.4130589070262598) internal successors, (1991), 1420 states have internal predecessors, (1991), 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) [2021-11-20 23:13:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1991 transitions. [2021-11-20 23:13:28,454 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1991 transitions. Word has length 259 [2021-11-20 23:13:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:28,457 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1991 transitions. [2021-11-20 23:13:28,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-20 23:13:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1991 transitions. [2021-11-20 23:13:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-20 23:13:28,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:28,470 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:28,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:13:28,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash 496867363, now seen corresponding path program 1 times [2021-11-20 23:13:28,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:28,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498443170] [2021-11-20 23:13:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:28,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:28,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:28,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498443170] [2021-11-20 23:13:28,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498443170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:28,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:28,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:28,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198544740] [2021-11-20 23:13:28,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:28,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:28,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:28,738 INFO L87 Difference]: Start difference. First operand 1421 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-11-20 23:13:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:29,248 INFO L93 Difference]: Finished difference Result 4094 states and 5707 transitions. [2021-11-20 23:13:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 261 [2021-11-20 23:13:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:29,277 INFO L225 Difference]: With dead ends: 4094 [2021-11-20 23:13:29,277 INFO L226 Difference]: Without dead ends: 2794 [2021-11-20 23:13:29,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:29,283 INFO L933 BasicCegarLoop]: 1935 mSDtfsCounter, 937 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:29,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 2886 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:13:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-11-20 23:13:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2728. [2021-11-20 23:13:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2716 states have (on average 1.412739322533137) internal successors, (3837), 2727 states have internal predecessors, (3837), 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) [2021-11-20 23:13:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 3837 transitions. [2021-11-20 23:13:29,437 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 3837 transitions. Word has length 261 [2021-11-20 23:13:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:29,440 INFO L470 AbstractCegarLoop]: Abstraction has 2728 states and 3837 transitions. [2021-11-20 23:13:29,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-11-20 23:13:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 3837 transitions. [2021-11-20 23:13:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-20 23:13:29,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:29,489 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:29,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:13:29,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1298648207, now seen corresponding path program 1 times [2021-11-20 23:13:29,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:29,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389040404] [2021-11-20 23:13:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:29,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:29,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:29,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389040404] [2021-11-20 23:13:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389040404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:29,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:29,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:29,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949767435] [2021-11-20 23:13:29,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:29,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:29,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:29,616 INFO L87 Difference]: Start difference. First operand 2728 states and 3837 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-11-20 23:13:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:30,213 INFO L93 Difference]: Finished difference Result 8032 states and 11278 transitions. [2021-11-20 23:13:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 261 [2021-11-20 23:13:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:30,250 INFO L225 Difference]: With dead ends: 8032 [2021-11-20 23:13:30,250 INFO L226 Difference]: Without dead ends: 5436 [2021-11-20 23:13:30,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:30,262 INFO L933 BasicCegarLoop]: 1978 mSDtfsCounter, 1041 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:30,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 2965 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:13:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-11-20 23:13:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 2731. [2021-11-20 23:13:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2719 states have (on average 1.4122839279146746) internal successors, (3840), 2730 states have internal predecessors, (3840), 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) [2021-11-20 23:13:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3840 transitions. [2021-11-20 23:13:30,542 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3840 transitions. Word has length 261 [2021-11-20 23:13:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:30,543 INFO L470 AbstractCegarLoop]: Abstraction has 2731 states and 3840 transitions. [2021-11-20 23:13:30,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-11-20 23:13:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3840 transitions. [2021-11-20 23:13:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-20 23:13:30,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:30,554 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:30,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:13:30,554 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1021601994, now seen corresponding path program 1 times [2021-11-20 23:13:30,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721890263] [2021-11-20 23:13:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:30,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:31,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:31,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721890263] [2021-11-20 23:13:31,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721890263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:31,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:31,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:13:31,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057168599] [2021-11-20 23:13:31,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:31,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:31,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:31,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:31,290 INFO L87 Difference]: Start difference. First operand 2731 states and 3840 transitions. Second operand has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 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) [2021-11-20 23:13:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:32,785 INFO L93 Difference]: Finished difference Result 7587 states and 10887 transitions. [2021-11-20 23:13:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:32,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 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 262 [2021-11-20 23:13:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:32,823 INFO L225 Difference]: With dead ends: 7587 [2021-11-20 23:13:32,824 INFO L226 Difference]: Without dead ends: 5971 [2021-11-20 23:13:32,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:32,830 INFO L933 BasicCegarLoop]: 1136 mSDtfsCounter, 1653 mSDsluCounter, 3201 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:32,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 4216 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:13:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-11-20 23:13:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5389. [2021-11-20 23:13:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5389 states, 5377 states have (on average 1.4539706155848986) internal successors, (7818), 5388 states have internal predecessors, (7818), 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) [2021-11-20 23:13:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5389 states to 5389 states and 7818 transitions. [2021-11-20 23:13:33,286 INFO L78 Accepts]: Start accepts. Automaton has 5389 states and 7818 transitions. Word has length 262 [2021-11-20 23:13:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:33,288 INFO L470 AbstractCegarLoop]: Abstraction has 5389 states and 7818 transitions. [2021-11-20 23:13:33,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 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) [2021-11-20 23:13:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5389 states and 7818 transitions. [2021-11-20 23:13:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-20 23:13:33,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:33,302 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:33,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:13:33,303 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1021171018, now seen corresponding path program 1 times [2021-11-20 23:13:33,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327395489] [2021-11-20 23:13:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:33,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:33,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:33,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327395489] [2021-11-20 23:13:33,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327395489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:33,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:33,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:33,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200360971] [2021-11-20 23:13:33,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:33,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:33,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:33,887 INFO L87 Difference]: Start difference. First operand 5389 states and 7818 transitions. Second operand has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 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) [2021-11-20 23:13:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:35,171 INFO L93 Difference]: Finished difference Result 15813 states and 22901 transitions. [2021-11-20 23:13:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:35,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 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 262 [2021-11-20 23:13:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:35,252 INFO L225 Difference]: With dead ends: 15813 [2021-11-20 23:13:35,253 INFO L226 Difference]: Without dead ends: 10439 [2021-11-20 23:13:35,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:35,262 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3404 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:35,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3404 Valid, 2503 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:13:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10439 states. [2021-11-20 23:13:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10439 to 10329. [2021-11-20 23:13:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10329 states, 10317 states have (on average 1.447998449161578) internal successors, (14939), 10328 states have internal predecessors, (14939), 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) [2021-11-20 23:13:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10329 states to 10329 states and 14939 transitions. [2021-11-20 23:13:36,119 INFO L78 Accepts]: Start accepts. Automaton has 10329 states and 14939 transitions. Word has length 262 [2021-11-20 23:13:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:36,120 INFO L470 AbstractCegarLoop]: Abstraction has 10329 states and 14939 transitions. [2021-11-20 23:13:36,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 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) [2021-11-20 23:13:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 10329 states and 14939 transitions. [2021-11-20 23:13:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-20 23:13:36,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:36,143 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:36,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:13:36,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash -986365744, now seen corresponding path program 1 times [2021-11-20 23:13:36,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:36,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322782032] [2021-11-20 23:13:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:36,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:36,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322782032] [2021-11-20 23:13:36,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322782032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:36,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:36,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:36,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111069521] [2021-11-20 23:13:36,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:36,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:36,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:36,589 INFO L87 Difference]: Start difference. First operand 10329 states and 14939 transitions. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 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) [2021-11-20 23:13:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:38,083 INFO L93 Difference]: Finished difference Result 26075 states and 37572 transitions. [2021-11-20 23:13:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 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 263 [2021-11-20 23:13:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:38,132 INFO L225 Difference]: With dead ends: 26075 [2021-11-20 23:13:38,133 INFO L226 Difference]: Without dead ends: 15884 [2021-11-20 23:13:38,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:38,239 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 2381 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:38,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2381 Valid, 2480 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:13:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15884 states. [2021-11-20 23:13:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15884 to 15054. [2021-11-20 23:13:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15054 states, 15042 states have (on average 1.4270043877143996) internal successors, (21465), 15053 states have internal predecessors, (21465), 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) [2021-11-20 23:13:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15054 states to 15054 states and 21465 transitions. [2021-11-20 23:13:39,529 INFO L78 Accepts]: Start accepts. Automaton has 15054 states and 21465 transitions. Word has length 263 [2021-11-20 23:13:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:39,532 INFO L470 AbstractCegarLoop]: Abstraction has 15054 states and 21465 transitions. [2021-11-20 23:13:39,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 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) [2021-11-20 23:13:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 15054 states and 21465 transitions. [2021-11-20 23:13:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-20 23:13:39,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:39,567 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:13:39,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -732716176, now seen corresponding path program 1 times [2021-11-20 23:13:39,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044412655] [2021-11-20 23:13:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:39,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:40,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:40,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044412655] [2021-11-20 23:13:40,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044412655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:40,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:40,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:40,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104742455] [2021-11-20 23:13:40,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:40,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:40,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:40,008 INFO L87 Difference]: Start difference. First operand 15054 states and 21465 transitions. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 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) [2021-11-20 23:13:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:42,463 INFO L93 Difference]: Finished difference Result 44318 states and 63074 transitions. [2021-11-20 23:13:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 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 265 [2021-11-20 23:13:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:42,554 INFO L225 Difference]: With dead ends: 44318 [2021-11-20 23:13:42,554 INFO L226 Difference]: Without dead ends: 29406 [2021-11-20 23:13:42,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:42,582 INFO L933 BasicCegarLoop]: 1382 mSDtfsCounter, 2502 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 2319 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:42,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2502 Valid, 2319 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:13:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29406 states. [2021-11-20 23:13:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29406 to 29296. [2021-11-20 23:13:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29296 states, 29284 states have (on average 1.4181805764239859) internal successors, (41530), 29295 states have internal predecessors, (41530), 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) [2021-11-20 23:13:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29296 states to 29296 states and 41530 transitions. [2021-11-20 23:13:45,229 INFO L78 Accepts]: Start accepts. Automaton has 29296 states and 41530 transitions. Word has length 265 [2021-11-20 23:13:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:45,230 INFO L470 AbstractCegarLoop]: Abstraction has 29296 states and 41530 transitions. [2021-11-20 23:13:45,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 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) [2021-11-20 23:13:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29296 states and 41530 transitions. [2021-11-20 23:13:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-20 23:13:45,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:45,284 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:45,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:13:45,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:45,286 INFO L85 PathProgramCache]: Analyzing trace with hash -458519251, now seen corresponding path program 1 times [2021-11-20 23:13:45,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:45,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331687355] [2021-11-20 23:13:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:45,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:45,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331687355] [2021-11-20 23:13:45,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331687355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:45,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:45,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:45,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867154133] [2021-11-20 23:13:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:45,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:45,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:45,563 INFO L87 Difference]: Start difference. First operand 29296 states and 41530 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2021-11-20 23:13:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:49,043 INFO L93 Difference]: Finished difference Result 87508 states and 124036 transitions. [2021-11-20 23:13:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:49,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 267 [2021-11-20 23:13:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:49,189 INFO L225 Difference]: With dead ends: 87508 [2021-11-20 23:13:49,190 INFO L226 Difference]: Without dead ends: 58435 [2021-11-20 23:13:49,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:49,240 INFO L933 BasicCegarLoop]: 1957 mSDtfsCounter, 1017 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 2944 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:49,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 2944 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:13:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58435 states. [2021-11-20 23:13:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58435 to 29329. [2021-11-20 23:13:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29329 states, 29317 states have (on average 1.4177098611726984) internal successors, (41563), 29328 states have internal predecessors, (41563), 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) [2021-11-20 23:13:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29329 states to 29329 states and 41563 transitions. [2021-11-20 23:13:51,757 INFO L78 Accepts]: Start accepts. Automaton has 29329 states and 41563 transitions. Word has length 267 [2021-11-20 23:13:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:51,758 INFO L470 AbstractCegarLoop]: Abstraction has 29329 states and 41563 transitions. [2021-11-20 23:13:51,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2021-11-20 23:13:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 29329 states and 41563 transitions. [2021-11-20 23:13:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-20 23:13:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:51,822 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:51,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:13:51,823 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -156988635, now seen corresponding path program 1 times [2021-11-20 23:13:51,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490369677] [2021-11-20 23:13:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:51,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:51,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490369677] [2021-11-20 23:13:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490369677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:51,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:51,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400577093] [2021-11-20 23:13:51,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:51,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:51,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:51,976 INFO L87 Difference]: Start difference. First operand 29329 states and 41563 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2021-11-20 23:13:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:55,628 INFO L93 Difference]: Finished difference Result 85028 states and 120120 transitions. [2021-11-20 23:13:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 267 [2021-11-20 23:13:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:55,787 INFO L225 Difference]: With dead ends: 85028 [2021-11-20 23:13:55,787 INFO L226 Difference]: Without dead ends: 57294 [2021-11-20 23:13:55,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:55,834 INFO L933 BasicCegarLoop]: 1914 mSDtfsCounter, 920 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2865 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:55,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 2865 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:13:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57294 states. [2021-11-20 23:13:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57294 to 57184. [2021-11-20 23:13:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57184 states, 57172 states have (on average 1.40981599384314) internal successors, (80602), 57183 states have internal predecessors, (80602), 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) [2021-11-20 23:13:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57184 states to 57184 states and 80602 transitions. [2021-11-20 23:13:59,518 INFO L78 Accepts]: Start accepts. Automaton has 57184 states and 80602 transitions. Word has length 267 [2021-11-20 23:13:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:59,518 INFO L470 AbstractCegarLoop]: Abstraction has 57184 states and 80602 transitions. [2021-11-20 23:13:59,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2021-11-20 23:13:59,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57184 states and 80602 transitions. [2021-11-20 23:13:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-20 23:13:59,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:59,595 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:59,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:13:59,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:13:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2138558730, now seen corresponding path program 1 times [2021-11-20 23:13:59,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:59,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646853995] [2021-11-20 23:13:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:59,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:59,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646853995] [2021-11-20 23:13:59,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646853995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:59,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:59,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954613843] [2021-11-20 23:13:59,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:59,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:59,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:59,719 INFO L87 Difference]: Start difference. First operand 57184 states and 80602 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2021-11-20 23:14:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:04,718 INFO L93 Difference]: Finished difference Result 130418 states and 187208 transitions. [2021-11-20 23:14:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 268 [2021-11-20 23:14:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:04,891 INFO L225 Difference]: With dead ends: 130418 [2021-11-20 23:14:04,891 INFO L226 Difference]: Without dead ends: 82596 [2021-11-20 23:14:04,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:04,948 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 514 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:04,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 2079 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:14:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82596 states. [2021-11-20 23:14:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82596 to 72064. [2021-11-20 23:14:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72064 states, 72052 states have (on average 1.4495364459001832) internal successors, (104442), 72063 states have internal predecessors, (104442), 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) [2021-11-20 23:14:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72064 states to 72064 states and 104442 transitions. [2021-11-20 23:14:10,072 INFO L78 Accepts]: Start accepts. Automaton has 72064 states and 104442 transitions. Word has length 268 [2021-11-20 23:14:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:10,073 INFO L470 AbstractCegarLoop]: Abstraction has 72064 states and 104442 transitions. [2021-11-20 23:14:10,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2021-11-20 23:14:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 72064 states and 104442 transitions. [2021-11-20 23:14:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-20 23:14:10,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:10,138 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:10,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:14:10,138 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-20 23:14:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -652337796, now seen corresponding path program 1 times [2021-11-20 23:14:10,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:10,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838506036] [2021-11-20 23:14:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:10,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:10,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:10,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838506036] [2021-11-20 23:14:10,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838506036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:10,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:10,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:14:10,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199625859] [2021-11-20 23:14:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:10,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:14:10,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:14:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:10,502 INFO L87 Difference]: Start difference. First operand 72064 states and 104442 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 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) [2021-11-20 23:14:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:19,610 INFO L93 Difference]: Finished difference Result 211595 states and 306461 transitions. [2021-11-20 23:14:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 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 268 [2021-11-20 23:14:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:19,879 INFO L225 Difference]: With dead ends: 211595 [2021-11-20 23:14:19,879 INFO L226 Difference]: Without dead ends: 139731 [2021-11-20 23:14:19,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:19,947 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 2282 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2282 SdHoareTripleChecker+Valid, 3578 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:19,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2282 Valid, 3578 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:14:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139731 states.