./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8 --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 afa96f494675daaffb7cf8ecfbe30f06e1bb06b9219ecf3df6181ac4e4f076f6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:01,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:01,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:01,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:01,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:01,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:01,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:01,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:01,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:01,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:01,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:01,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:01,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:01,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:01,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:01,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:01,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:01,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:01,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:01,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:01,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:01,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:01,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:01,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:01,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:01,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:01,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:01,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:01,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:01,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:01,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:01,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:01,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:01,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:01,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:01,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:01,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:01,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:01,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:01,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:01,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:01,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:16:01,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:01,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:01,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:01,439 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:01,440 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:01,440 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:01,440 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:16:01,440 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:01,440 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:01,441 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:16:01,441 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:16:01,441 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:01,441 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:16:01,441 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:16:01,442 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:16:01,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:01,443 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:16:01,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:16:01,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:16:01,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:01,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:01,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:01,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:01,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:01,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:16:01,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:01,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:01,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:01,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:01,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:01,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:01,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:01,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:01,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:01,446 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:16:01,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:16:01,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:01,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:01,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:01,447 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afa96f494675daaffb7cf8ecfbe30f06e1bb06b9219ecf3df6181ac4e4f076f6 [2021-11-07 02:16:01,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:01,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:01,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:01,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:01,751 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:01,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-07 02:16:01,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/data/3cd6a5609/8b7bf1fed48e40deaddab111c6d71a4e/FLAG82081c28b [2021-11-07 02:16:02,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:02,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-07 02:16:02,666 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/data/3cd6a5609/8b7bf1fed48e40deaddab111c6d71a4e/FLAG82081c28b [2021-11-07 02:16:02,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/data/3cd6a5609/8b7bf1fed48e40deaddab111c6d71a4e [2021-11-07 02:16:02,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:02,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:02,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:02,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:02,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:02,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:02" (1/1) ... [2021-11-07 02:16:02,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2daee595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:02, skipping insertion in model container [2021-11-07 02:16:02,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:02" (1/1) ... [2021-11-07 02:16:02,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:02,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:03,385 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[12460,12473] [2021-11-07 02:16:03,468 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[19746,19759] [2021-11-07 02:16:03,483 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[22098,22111] [2021-11-07 02:16:03,492 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[23218,23231] [2021-11-07 02:16:03,514 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[26768,26781] [2021-11-07 02:16:03,522 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[27891,27904] [2021-11-07 02:16:03,538 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[30206,30219] [2021-11-07 02:16:04,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:04,172 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:16:04,254 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[12460,12473] [2021-11-07 02:16:04,282 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[19746,19759] [2021-11-07 02:16:04,292 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[22098,22111] [2021-11-07 02:16:04,298 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[23218,23231] [2021-11-07 02:16:04,311 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[26768,26781] [2021-11-07 02:16:04,316 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[27891,27904] [2021-11-07 02:16:04,323 WARN L228 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_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[30206,30219] [2021-11-07 02:16:04,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:04,667 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:16:04,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04 WrapperNode [2021-11-07 02:16:04,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:04,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:04,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:16:04,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:16:04,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:04,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:04,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:04,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:16:04,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:16:04,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:16:04,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:04,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:04,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:04,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:04,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:05,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:05,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:05,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:16:05,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:16:05,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:16:05,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:16:05,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (1/1) ... [2021-11-07 02:16:05,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:05,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:16:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:16:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:16:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:16:05,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:16:05,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3ee649-b31e-4bc1-b5e2-2760d154ec21/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:16:09,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:16:09,424 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:16:09,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:09 BoogieIcfgContainer [2021-11-07 02:16:09,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:16:09,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:16:09,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:16:09,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:16:09,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:16:02" (1/3) ... [2021-11-07 02:16:09,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131c440f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:09, skipping insertion in model container [2021-11-07 02:16:09,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:04" (2/3) ... [2021-11-07 02:16:09,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131c440f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:09, skipping insertion in model container [2021-11-07 02:16:09,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:09" (3/3) ... [2021-11-07 02:16:09,438 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-07 02:16:09,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:16:09,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 02:16:09,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:16:09,528 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 [2021-11-07 02:16:09,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 02:16:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 1059 states, 1051 states have (on average 1.8924833491912465) internal successors, (1989), 1058 states have internal predecessors, (1989), 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) [2021-11-07 02:16:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:16:09,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:09,609 INFO L513 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] [2021-11-07 02:16:09,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1184813438, now seen corresponding path program 1 times [2021-11-07 02:16:09,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:09,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537091711] [2021-11-07 02:16:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:09,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:10,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:10,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537091711] [2021-11-07 02:16:10,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537091711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:10,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:10,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:16:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020689534] [2021-11-07 02:16:10,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:10,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:10,259 INFO L87 Difference]: Start difference. First operand has 1059 states, 1051 states have (on average 1.8924833491912465) internal successors, (1989), 1058 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 02:16:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:10,584 INFO L93 Difference]: Finished difference Result 1348 states and 2449 transitions. [2021-11-07 02:16:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 02:16:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:10,615 INFO L225 Difference]: With dead ends: 1348 [2021-11-07 02:16:10,615 INFO L226 Difference]: Without dead ends: 1214 [2021-11-07 02:16:10,620 INFO L786 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 [2021-11-07 02:16:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-11-07 02:16:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1206. [2021-11-07 02:16:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1199 states have (on average 1.291909924937448) internal successors, (1549), 1205 states have internal predecessors, (1549), 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) [2021-11-07 02:16:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1549 transitions. [2021-11-07 02:16:10,768 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1549 transitions. Word has length 63 [2021-11-07 02:16:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:10,769 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1549 transitions. [2021-11-07 02:16:10,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 02:16:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1549 transitions. [2021-11-07 02:16:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:16:10,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:10,774 INFO L513 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] [2021-11-07 02:16:10,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:16:10,774 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2003436219, now seen corresponding path program 1 times [2021-11-07 02:16:10,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:10,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869099889] [2021-11-07 02:16:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:10,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:10,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:10,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869099889] [2021-11-07 02:16:10,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869099889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:10,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:10,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:16:10,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890531385] [2021-11-07 02:16:10,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:10,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:10,934 INFO L87 Difference]: Start difference. First operand 1206 states and 1549 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 02:16:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:11,053 INFO L93 Difference]: Finished difference Result 1737 states and 2289 transitions. [2021-11-07 02:16:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 02:16:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:11,065 INFO L225 Difference]: With dead ends: 1737 [2021-11-07 02:16:11,066 INFO L226 Difference]: Without dead ends: 1456 [2021-11-07 02:16:11,073 INFO L786 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 [2021-11-07 02:16:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-11-07 02:16:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1448. [2021-11-07 02:16:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1441 states have (on average 1.3095072866065232) internal successors, (1887), 1447 states have internal predecessors, (1887), 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) [2021-11-07 02:16:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1887 transitions. [2021-11-07 02:16:11,147 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1887 transitions. Word has length 63 [2021-11-07 02:16:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:11,151 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 1887 transitions. [2021-11-07 02:16:11,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 02:16:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1887 transitions. [2021-11-07 02:16:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:16:11,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:11,157 INFO L513 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] [2021-11-07 02:16:11,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:16:11,158 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1542392687, now seen corresponding path program 1 times [2021-11-07 02:16:11,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:11,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978454413] [2021-11-07 02:16:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:11,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:11,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:11,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978454413] [2021-11-07 02:16:11,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978454413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:11,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:11,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:16:11,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277807627] [2021-11-07 02:16:11,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:16:11,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:16:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:16:11,324 INFO L87 Difference]: Start difference. First operand 1448 states and 1887 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-11-07 02:16:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:12,079 INFO L93 Difference]: Finished difference Result 2715 states and 3620 transitions. [2021-11-07 02:16:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-11-07 02:16:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:12,089 INFO L225 Difference]: With dead ends: 2715 [2021-11-07 02:16:12,089 INFO L226 Difference]: Without dead ends: 1575 [2021-11-07 02:16:12,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-07 02:16:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1567. [2021-11-07 02:16:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1560 states have (on average 1.3429487179487178) internal successors, (2095), 1566 states have internal predecessors, (2095), 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) [2021-11-07 02:16:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2095 transitions. [2021-11-07 02:16:12,172 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2095 transitions. Word has length 63 [2021-11-07 02:16:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:12,172 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 2095 transitions. [2021-11-07 02:16:12,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-11-07 02:16:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2095 transitions. [2021-11-07 02:16:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:16:12,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:12,176 INFO L513 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] [2021-11-07 02:16:12,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:16:12,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1152487412, now seen corresponding path program 1 times [2021-11-07 02:16:12,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:12,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259698316] [2021-11-07 02:16:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:12,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:12,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:12,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259698316] [2021-11-07 02:16:12,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259698316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:12,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:12,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:16:12,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545223774] [2021-11-07 02:16:12,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:12,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:12,250 INFO L87 Difference]: Start difference. First operand 1567 states and 2095 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:12,386 INFO L93 Difference]: Finished difference Result 3538 states and 4810 transitions. [2021-11-07 02:16:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:16:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:12,401 INFO L225 Difference]: With dead ends: 3538 [2021-11-07 02:16:12,401 INFO L226 Difference]: Without dead ends: 2573 [2021-11-07 02:16:12,404 INFO L786 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 [2021-11-07 02:16:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-07 02:16:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2565. [2021-11-07 02:16:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2558 states have (on average 1.3444096950742768) internal successors, (3439), 2564 states have internal predecessors, (3439), 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) [2021-11-07 02:16:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3439 transitions. [2021-11-07 02:16:12,544 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3439 transitions. Word has length 64 [2021-11-07 02:16:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:12,545 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 3439 transitions. [2021-11-07 02:16:12,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3439 transitions. [2021-11-07 02:16:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:16:12,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:12,551 INFO L513 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] [2021-11-07 02:16:12,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:16:12,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash -998210018, now seen corresponding path program 1 times [2021-11-07 02:16:12,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:12,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290008000] [2021-11-07 02:16:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:12,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:12,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:12,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290008000] [2021-11-07 02:16:12,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290008000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:12,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:12,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:16:12,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682230857] [2021-11-07 02:16:12,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:16:12,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:12,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:16:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:16:12,681 INFO L87 Difference]: Start difference. First operand 2565 states and 3439 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:13,647 INFO L93 Difference]: Finished difference Result 5263 states and 7132 transitions. [2021-11-07 02:16:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:16:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:13,670 INFO L225 Difference]: With dead ends: 5263 [2021-11-07 02:16:13,670 INFO L226 Difference]: Without dead ends: 3302 [2021-11-07 02:16:13,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-11-07 02:16:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 3294. [2021-11-07 02:16:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3287 states have (on average 1.3383024034073623) internal successors, (4399), 3293 states have internal predecessors, (4399), 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) [2021-11-07 02:16:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 4399 transitions. [2021-11-07 02:16:13,937 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 4399 transitions. Word has length 64 [2021-11-07 02:16:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:13,937 INFO L470 AbstractCegarLoop]: Abstraction has 3294 states and 4399 transitions. [2021-11-07 02:16:13,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 4399 transitions. [2021-11-07 02:16:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:16:13,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:13,947 INFO L513 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] [2021-11-07 02:16:13,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:16:13,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1760122824, now seen corresponding path program 1 times [2021-11-07 02:16:13,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:13,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914016451] [2021-11-07 02:16:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:13,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:14,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:14,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914016451] [2021-11-07 02:16:14,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914016451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:14,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:14,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:16:14,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612128596] [2021-11-07 02:16:14,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:16:14,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:16:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:16:14,058 INFO L87 Difference]: Start difference. First operand 3294 states and 4399 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:14,978 INFO L93 Difference]: Finished difference Result 7715 states and 10483 transitions. [2021-11-07 02:16:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:16:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:15,007 INFO L225 Difference]: With dead ends: 7715 [2021-11-07 02:16:15,007 INFO L226 Difference]: Without dead ends: 4854 [2021-11-07 02:16:15,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-11-07 02:16:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 4846. [2021-11-07 02:16:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4846 states, 4839 states have (on average 1.3533787972721636) internal successors, (6549), 4845 states have internal predecessors, (6549), 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) [2021-11-07 02:16:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 6549 transitions. [2021-11-07 02:16:15,371 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 6549 transitions. Word has length 64 [2021-11-07 02:16:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:15,372 INFO L470 AbstractCegarLoop]: Abstraction has 4846 states and 6549 transitions. [2021-11-07 02:16:15,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 6549 transitions. [2021-11-07 02:16:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:16:15,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:15,378 INFO L513 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] [2021-11-07 02:16:15,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:16:15,378 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1332635061, now seen corresponding path program 1 times [2021-11-07 02:16:15,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:15,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571328728] [2021-11-07 02:16:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:15,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:15,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:15,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571328728] [2021-11-07 02:16:15,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571328728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:15,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:15,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:16:15,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245750441] [2021-11-07 02:16:15,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:16:15,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:16:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:16:15,547 INFO L87 Difference]: Start difference. First operand 4846 states and 6549 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-07 02:16:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:16,623 INFO L93 Difference]: Finished difference Result 12804 states and 17488 transitions. [2021-11-07 02:16:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-11-07 02:16:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:16,670 INFO L225 Difference]: With dead ends: 12804 [2021-11-07 02:16:16,670 INFO L226 Difference]: Without dead ends: 8196 [2021-11-07 02:16:16,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8196 states. [2021-11-07 02:16:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8196 to 8188. [2021-11-07 02:16:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 8181 states have (on average 1.3539909546510207) internal successors, (11077), 8187 states have internal predecessors, (11077), 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) [2021-11-07 02:16:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 11077 transitions. [2021-11-07 02:16:17,375 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 11077 transitions. Word has length 65 [2021-11-07 02:16:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:17,375 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 11077 transitions. [2021-11-07 02:16:17,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-07 02:16:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 11077 transitions. [2021-11-07 02:16:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:16:17,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:17,387 INFO L513 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] [2021-11-07 02:16:17,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:16:17,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash -254635222, now seen corresponding path program 1 times [2021-11-07 02:16:17,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:17,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394932203] [2021-11-07 02:16:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:17,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:17,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:17,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394932203] [2021-11-07 02:16:17,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394932203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:17,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:17,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:16:17,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650829113] [2021-11-07 02:16:17,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:17,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:17,481 INFO L87 Difference]: Start difference. First operand 8188 states and 11077 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 02:16:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:18,653 INFO L93 Difference]: Finished difference Result 20818 states and 28288 transitions. [2021-11-07 02:16:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 02:16:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:18,731 INFO L225 Difference]: With dead ends: 20818 [2021-11-07 02:16:18,731 INFO L226 Difference]: Without dead ends: 13787 [2021-11-07 02:16:18,746 INFO L786 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 [2021-11-07 02:16:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13787 states. [2021-11-07 02:16:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13787 to 13779. [2021-11-07 02:16:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13779 states, 13772 states have (on average 1.3427243682834737) internal successors, (18492), 13778 states have internal predecessors, (18492), 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) [2021-11-07 02:16:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13779 states to 13779 states and 18492 transitions. [2021-11-07 02:16:19,839 INFO L78 Accepts]: Start accepts. Automaton has 13779 states and 18492 transitions. Word has length 66 [2021-11-07 02:16:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:19,839 INFO L470 AbstractCegarLoop]: Abstraction has 13779 states and 18492 transitions. [2021-11-07 02:16:19,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 02:16:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 13779 states and 18492 transitions. [2021-11-07 02:16:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:19,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:19,850 INFO L513 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] [2021-11-07 02:16:19,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:16:19,850 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2145810939, now seen corresponding path program 1 times [2021-11-07 02:16:19,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:19,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085454835] [2021-11-07 02:16:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:19,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:20,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:20,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085454835] [2021-11-07 02:16:20,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085454835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:20,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:20,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:16:20,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438075970] [2021-11-07 02:16:20,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:20,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:20,038 INFO L87 Difference]: Start difference. First operand 13779 states and 18492 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:26,433 INFO L93 Difference]: Finished difference Result 71170 states and 96948 transitions. [2021-11-07 02:16:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:16:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 67 [2021-11-07 02:16:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:26,678 INFO L225 Difference]: With dead ends: 71170 [2021-11-07 02:16:26,678 INFO L226 Difference]: Without dead ends: 65374 [2021-11-07 02:16:26,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:16:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65374 states. [2021-11-07 02:16:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65374 to 13847. [2021-11-07 02:16:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13847 states, 13840 states have (on average 1.342485549132948) internal successors, (18580), 13846 states have internal predecessors, (18580), 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) [2021-11-07 02:16:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13847 states to 13847 states and 18580 transitions. [2021-11-07 02:16:28,866 INFO L78 Accepts]: Start accepts. Automaton has 13847 states and 18580 transitions. Word has length 67 [2021-11-07 02:16:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:28,867 INFO L470 AbstractCegarLoop]: Abstraction has 13847 states and 18580 transitions. [2021-11-07 02:16:28,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 13847 states and 18580 transitions. [2021-11-07 02:16:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:28,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:28,880 INFO L513 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] [2021-11-07 02:16:28,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:16:28,881 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:28,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2044326195, now seen corresponding path program 1 times [2021-11-07 02:16:28,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:28,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634043305] [2021-11-07 02:16:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:28,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:29,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:29,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634043305] [2021-11-07 02:16:29,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634043305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:29,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:29,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:16:29,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388879376] [2021-11-07 02:16:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:29,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:29,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:29,019 INFO L87 Difference]: Start difference. First operand 13847 states and 18580 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:35,749 INFO L93 Difference]: Finished difference Result 64574 states and 87598 transitions. [2021-11-07 02:16:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:16:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 67 [2021-11-07 02:16:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:35,907 INFO L225 Difference]: With dead ends: 64574 [2021-11-07 02:16:35,907 INFO L226 Difference]: Without dead ends: 58850 [2021-11-07 02:16:35,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:16:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58850 states. [2021-11-07 02:16:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58850 to 14003. [2021-11-07 02:16:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14003 states, 13996 states have (on average 1.3422406401829095) internal successors, (18786), 14002 states have internal predecessors, (18786), 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) [2021-11-07 02:16:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14003 states to 14003 states and 18786 transitions. [2021-11-07 02:16:37,923 INFO L78 Accepts]: Start accepts. Automaton has 14003 states and 18786 transitions. Word has length 67 [2021-11-07 02:16:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:37,924 INFO L470 AbstractCegarLoop]: Abstraction has 14003 states and 18786 transitions. [2021-11-07 02:16:37,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 14003 states and 18786 transitions. [2021-11-07 02:16:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:37,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:37,937 INFO L513 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] [2021-11-07 02:16:37,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 02:16:37,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1189983517, now seen corresponding path program 1 times [2021-11-07 02:16:37,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:37,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358405293] [2021-11-07 02:16:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:37,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:38,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:38,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358405293] [2021-11-07 02:16:38,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358405293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:38,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:38,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:16:38,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555194290] [2021-11-07 02:16:38,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:38,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:38,125 INFO L87 Difference]: Start difference. First operand 14003 states and 18786 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:46,054 INFO L93 Difference]: Finished difference Result 57224 states and 77306 transitions. [2021-11-07 02:16:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:16:46,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 67 [2021-11-07 02:16:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:46,139 INFO L225 Difference]: With dead ends: 57224 [2021-11-07 02:16:46,139 INFO L226 Difference]: Without dead ends: 51866 [2021-11-07 02:16:46,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:16:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51866 states. [2021-11-07 02:16:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51866 to 14074. [2021-11-07 02:16:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14074 states, 14067 states have (on average 1.342503732139049) internal successors, (18885), 14073 states have internal predecessors, (18885), 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) [2021-11-07 02:16:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14074 states to 14074 states and 18885 transitions. [2021-11-07 02:16:48,149 INFO L78 Accepts]: Start accepts. Automaton has 14074 states and 18885 transitions. Word has length 67 [2021-11-07 02:16:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:48,150 INFO L470 AbstractCegarLoop]: Abstraction has 14074 states and 18885 transitions. [2021-11-07 02:16:48,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14074 states and 18885 transitions. [2021-11-07 02:16:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:48,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:48,165 INFO L513 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] [2021-11-07 02:16:48,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 02:16:48,166 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:48,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:48,167 INFO L85 PathProgramCache]: Analyzing trace with hash -92881536, now seen corresponding path program 1 times [2021-11-07 02:16:48,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:48,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829430357] [2021-11-07 02:16:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:48,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:48,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829430357] [2021-11-07 02:16:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829430357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:48,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:48,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:16:48,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464193684] [2021-11-07 02:16:48,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:48,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:48,300 INFO L87 Difference]: Start difference. First operand 14074 states and 18885 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:55,803 INFO L93 Difference]: Finished difference Result 52840 states and 70924 transitions. [2021-11-07 02:16:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:16:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 67 [2021-11-07 02:16:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:55,890 INFO L225 Difference]: With dead ends: 52840 [2021-11-07 02:16:55,890 INFO L226 Difference]: Without dead ends: 47022 [2021-11-07 02:16:55,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:16:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47022 states. [2021-11-07 02:16:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47022 to 14109. [2021-11-07 02:16:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14109 states, 14102 states have (on average 1.3423627854205078) internal successors, (18930), 14108 states have internal predecessors, (18930), 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) [2021-11-07 02:16:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14109 states to 14109 states and 18930 transitions. [2021-11-07 02:16:58,184 INFO L78 Accepts]: Start accepts. Automaton has 14109 states and 18930 transitions. Word has length 67 [2021-11-07 02:16:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:58,184 INFO L470 AbstractCegarLoop]: Abstraction has 14109 states and 18930 transitions. [2021-11-07 02:16:58,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-07 02:16:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 14109 states and 18930 transitions. [2021-11-07 02:16:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:16:58,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:58,198 INFO L513 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] [2021-11-07 02:16:58,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 02:16:58,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:16:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash 680595235, now seen corresponding path program 1 times [2021-11-07 02:16:58,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:16:58,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120971960] [2021-11-07 02:16:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:58,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:16:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:58,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:16:58,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120971960] [2021-11-07 02:16:58,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120971960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:58,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:58,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:16:58,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333932537] [2021-11-07 02:16:58,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:58,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:16:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:58,385 INFO L87 Difference]: Start difference. First operand 14109 states and 18930 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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) [2021-11-07 02:17:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:04,063 INFO L93 Difference]: Finished difference Result 38833 states and 52356 transitions. [2021-11-07 02:17:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:17:04,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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 68 [2021-11-07 02:17:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:04,108 INFO L225 Difference]: With dead ends: 38833 [2021-11-07 02:17:04,108 INFO L226 Difference]: Without dead ends: 27611 [2021-11-07 02:17:04,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:17:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27611 states. [2021-11-07 02:17:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27611 to 13807. [2021-11-07 02:17:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13807 states, 13800 states have (on average 1.3408695652173912) internal successors, (18504), 13806 states have internal predecessors, (18504), 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) [2021-11-07 02:17:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13807 states to 13807 states and 18504 transitions. [2021-11-07 02:17:06,309 INFO L78 Accepts]: Start accepts. Automaton has 13807 states and 18504 transitions. Word has length 68 [2021-11-07 02:17:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:06,309 INFO L470 AbstractCegarLoop]: Abstraction has 13807 states and 18504 transitions. [2021-11-07 02:17:06,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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) [2021-11-07 02:17:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 13807 states and 18504 transitions. [2021-11-07 02:17:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:17:06,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:06,317 INFO L513 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] [2021-11-07 02:17:06,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 02:17:06,318 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:17:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 718017329, now seen corresponding path program 1 times [2021-11-07 02:17:06,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:17:06,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899314727] [2021-11-07 02:17:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:06,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:17:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:06,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:17:06,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899314727] [2021-11-07 02:17:06,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899314727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:06,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:06,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 02:17:06,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023647126] [2021-11-07 02:17:06,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:17:06,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:17:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:17:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:17:06,489 INFO L87 Difference]: Start difference. First operand 13807 states and 18504 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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) [2021-11-07 02:17:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:12,976 INFO L93 Difference]: Finished difference Result 41466 states and 55789 transitions. [2021-11-07 02:17:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:17:12,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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 68 [2021-11-07 02:17:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:13,026 INFO L225 Difference]: With dead ends: 41466 [2021-11-07 02:17:13,027 INFO L226 Difference]: Without dead ends: 30702 [2021-11-07 02:17:13,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:17:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30702 states. [2021-11-07 02:17:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30702 to 13676. [2021-11-07 02:17:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13676 states, 13669 states have (on average 1.3404052966566684) internal successors, (18322), 13675 states have internal predecessors, (18322), 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) [2021-11-07 02:17:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13676 states to 13676 states and 18322 transitions. [2021-11-07 02:17:15,512 INFO L78 Accepts]: Start accepts. Automaton has 13676 states and 18322 transitions. Word has length 68 [2021-11-07 02:17:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:15,513 INFO L470 AbstractCegarLoop]: Abstraction has 13676 states and 18322 transitions. [2021-11-07 02:17:15,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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) [2021-11-07 02:17:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 13676 states and 18322 transitions. [2021-11-07 02:17:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:17:15,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:15,523 INFO L513 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] [2021-11-07 02:17:15,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 02:17:15,524 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 02:17:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2097490812, now seen corresponding path program 1 times [2021-11-07 02:17:15,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:17:15,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978549909] [2021-11-07 02:17:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:15,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:17:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:15,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:17:15,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978549909] [2021-11-07 02:17:15,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978549909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:15,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:15,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 02:17:15,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469028513] [2021-11-07 02:17:15,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:17:15,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:17:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:17:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:17:15,655 INFO L87 Difference]: Start difference. First operand 13676 states and 18322 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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) [2021-11-07 02:17:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:22,668 INFO L93 Difference]: Finished difference Result 41548 states and 55893 transitions. [2021-11-07 02:17:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:17:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 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 68 [2021-11-07 02:17:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:22,725 INFO L225 Difference]: With dead ends: 41548 [2021-11-07 02:17:22,725 INFO L226 Difference]: Without dead ends: 31008 [2021-11-07 02:17:22,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:17:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31008 states.