./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/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 876148c876cf7c1b78d2f058097c1ea19d5931075241b9f9a3c243e2bacc58fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:36,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:36,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:36,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:36,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:36,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:36,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:36,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:36,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:36,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:36,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:36,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:36,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:36,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:36,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:36,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:36,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:36,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:36,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:36,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:36,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:36,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:36,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:36,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:36,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:36,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:36,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:36,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:36,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:36,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:36,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:36,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:36,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:36,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:36,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:36,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:36,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:36,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:36,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:36,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:36,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:36,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:43:37,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:37,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:37,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:37,008 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:37,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:37,009 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:37,009 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:43:37,009 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:37,009 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:37,009 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:43:37,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:43:37,010 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:37,010 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:43:37,010 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:43:37,011 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:43:37,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:37,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:37,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:43:37,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:37,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:37,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:37,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:37,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:37,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:37,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:37,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:37,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:37,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:37,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:37,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:37,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:37,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:37,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:37,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:37,016 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:43:37,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:43:37,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:37,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:37,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:37,017 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 876148c876cf7c1b78d2f058097c1ea19d5931075241b9f9a3c243e2bacc58fd [2021-11-07 01:43:37,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:37,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:37,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:37,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:37,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:37,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-07 01:43:37,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/data/21311d075/8ab92cf57def4b8f8c4bdee19dc4b9df/FLAG5645db250 [2021-11-07 01:43:38,084 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:43:38,084 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-07 01:43:38,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/data/21311d075/8ab92cf57def4b8f8c4bdee19dc4b9df/FLAG5645db250 [2021-11-07 01:43:38,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/data/21311d075/8ab92cf57def4b8f8c4bdee19dc4b9df [2021-11-07 01:43:38,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:43:38,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:43:38,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:38,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:43:38,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:43:38,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33696f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38, skipping insertion in model container [2021-11-07 01:43:38,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:43:38,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:38,752 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[10927,10940] [2021-11-07 01:43:38,783 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14764,14777] [2021-11-07 01:43:38,796 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15985,15998] [2021-11-07 01:43:38,804 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16691,16704] [2021-11-07 01:43:38,818 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18235,18248] [2021-11-07 01:43:38,826 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18941,18954] [2021-11-07 01:43:38,836 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19970,19983] [2021-11-07 01:43:38,862 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22376,22389] [2021-11-07 01:43:38,869 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[23085,23098] [2021-11-07 01:43:38,877 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24122,24135] [2021-11-07 01:43:38,891 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26018,26031] [2021-11-07 01:43:38,939 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[29926,29939] [2021-11-07 01:43:38,952 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[30635,30648] [2021-11-07 01:43:38,960 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[31667,31680] [2021-11-07 01:43:38,984 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[33558,33571] [2021-11-07 01:43:39,018 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[36771,36784] [2021-11-07 01:43:39,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:39,304 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:43:39,451 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[10927,10940] [2021-11-07 01:43:39,503 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14764,14777] [2021-11-07 01:43:39,518 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15985,15998] [2021-11-07 01:43:39,528 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16691,16704] [2021-11-07 01:43:39,549 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18235,18248] [2021-11-07 01:43:39,566 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18941,18954] [2021-11-07 01:43:39,588 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19970,19983] [2021-11-07 01:43:39,607 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[22376,22389] [2021-11-07 01:43:39,613 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[23085,23098] [2021-11-07 01:43:39,620 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24122,24135] [2021-11-07 01:43:39,637 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26018,26031] [2021-11-07 01:43:39,658 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[29926,29939] [2021-11-07 01:43:39,663 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[30635,30648] [2021-11-07 01:43:39,669 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[31667,31680] [2021-11-07 01:43:39,689 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[33558,33571] [2021-11-07 01:43:39,706 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_105caa4f-bed5-4bcb-a46e-3865ca30cea3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[36771,36784] [2021-11-07 01:43:39,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:39,867 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:43:39,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39 WrapperNode [2021-11-07 01:43:39,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:39,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:43:39,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:43:39,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:43:39,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:39,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:43:40,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:43:40,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:43:40,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:43:40,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:43:40,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:43:40,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:43:40,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:43:40,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (1/1) ... [2021-11-07 01:43:40,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:40,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:43:40,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:43:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:43:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:43:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:43:40,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:43:42,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:43:42,941 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:43:42,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:42 BoogieIcfgContainer [2021-11-07 01:43:42,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:43:42,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:43:42,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:43:42,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:43:42,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:43:38" (1/3) ... [2021-11-07 01:43:42,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e94708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:42, skipping insertion in model container [2021-11-07 01:43:42,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:39" (2/3) ... [2021-11-07 01:43:42,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e94708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:42, skipping insertion in model container [2021-11-07 01:43:42,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:42" (3/3) ... [2021-11-07 01:43:42,964 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-07 01:43:42,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:43:42,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-07 01:43:43,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:43:43,045 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 01:43:43,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-07 01:43:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 601 states, 584 states have (on average 1.856164383561644) internal successors, (1084), 600 states have internal predecessors, (1084), 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 01:43:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:43:43,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:43,127 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, 1, 1] [2021-11-07 01:43:43,128 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1484817577, now seen corresponding path program 1 times [2021-11-07 01:43:43,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:43,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197437080] [2021-11-07 01:43:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:43,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:43,758 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 01:43:43,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:43,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197437080] [2021-11-07 01:43:43,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197437080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:43,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:43,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:43,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124747543] [2021-11-07 01:43:43,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:43,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:43,807 INFO L87 Difference]: Start difference. First operand has 601 states, 584 states have (on average 1.856164383561644) internal successors, (1084), 600 states have internal predecessors, (1084), 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 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 01:43:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:44,421 INFO L93 Difference]: Finished difference Result 920 states and 1599 transitions. [2021-11-07 01:43:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:44,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2021-11-07 01:43:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:44,449 INFO L225 Difference]: With dead ends: 920 [2021-11-07 01:43:44,450 INFO L226 Difference]: Without dead ends: 483 [2021-11-07 01:43:44,459 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 01:43:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-07 01:43:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-11-07 01:43:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 467 states have (on average 1.2826552462526766) internal successors, (599), 482 states have internal predecessors, (599), 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 01:43:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 599 transitions. [2021-11-07 01:43:44,584 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 599 transitions. Word has length 70 [2021-11-07 01:43:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:44,586 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 599 transitions. [2021-11-07 01:43:44,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 01:43:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 599 transitions. [2021-11-07 01:43:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:43:44,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:44,596 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, 1, 1, 1] [2021-11-07 01:43:44,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:43:44,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1062417945, now seen corresponding path program 1 times [2021-11-07 01:43:44,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:44,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746751803] [2021-11-07 01:43:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:44,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:44,728 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 01:43:44,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:44,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746751803] [2021-11-07 01:43:44,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746751803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:44,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:44,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:44,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379744844] [2021-11-07 01:43:44,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:44,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:44,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:44,733 INFO L87 Difference]: Start difference. First operand 483 states and 599 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 01:43:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:45,055 INFO L93 Difference]: Finished difference Result 796 states and 1013 transitions. [2021-11-07 01:43:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 71 [2021-11-07 01:43:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:45,059 INFO L225 Difference]: With dead ends: 796 [2021-11-07 01:43:45,059 INFO L226 Difference]: Without dead ends: 416 [2021-11-07 01:43:45,060 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 01:43:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-07 01:43:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-11-07 01:43:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 400 states have (on average 1.3075) internal successors, (523), 415 states have internal predecessors, (523), 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 01:43:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 523 transitions. [2021-11-07 01:43:45,082 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 523 transitions. Word has length 71 [2021-11-07 01:43:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:45,083 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 523 transitions. [2021-11-07 01:43:45,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 01:43:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 523 transitions. [2021-11-07 01:43:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:43:45,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:45,085 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, 1, 1, 1, 1] [2021-11-07 01:43:45,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:43:45,086 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -387238674, now seen corresponding path program 1 times [2021-11-07 01:43:45,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:45,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901211176] [2021-11-07 01:43:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:45,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:45,270 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 01:43:45,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:45,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901211176] [2021-11-07 01:43:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901211176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:45,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:45,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:45,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039251625] [2021-11-07 01:43:45,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:45,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:45,276 INFO L87 Difference]: Start difference. First operand 416 states and 523 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:45,591 INFO L93 Difference]: Finished difference Result 729 states and 936 transitions. [2021-11-07 01:43:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:45,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:43:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:45,596 INFO L225 Difference]: With dead ends: 729 [2021-11-07 01:43:45,596 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 01:43:45,597 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 01:43:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 01:43:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-07 01:43:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 374 states have (on average 1.3155080213903743) internal successors, (492), 389 states have internal predecessors, (492), 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 01:43:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 492 transitions. [2021-11-07 01:43:45,618 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 492 transitions. Word has length 72 [2021-11-07 01:43:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:45,618 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 492 transitions. [2021-11-07 01:43:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 492 transitions. [2021-11-07 01:43:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:43:45,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:45,622 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, 1, 1, 1, 1, 1] [2021-11-07 01:43:45,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:43:45,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -289112562, now seen corresponding path program 1 times [2021-11-07 01:43:45,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:45,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567765470] [2021-11-07 01:43:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:45,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:45,766 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 01:43:45,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:45,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567765470] [2021-11-07 01:43:45,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567765470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:45,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:45,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:45,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938660503] [2021-11-07 01:43:45,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:45,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:45,771 INFO L87 Difference]: Start difference. First operand 390 states and 492 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:46,073 INFO L93 Difference]: Finished difference Result 703 states and 904 transitions. [2021-11-07 01:43:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:43:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:46,076 INFO L225 Difference]: With dead ends: 703 [2021-11-07 01:43:46,076 INFO L226 Difference]: Without dead ends: 371 [2021-11-07 01:43:46,077 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 01:43:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-07 01:43:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-11-07 01:43:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 355 states have (on average 1.323943661971831) internal successors, (470), 370 states have internal predecessors, (470), 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 01:43:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 470 transitions. [2021-11-07 01:43:46,100 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 470 transitions. Word has length 73 [2021-11-07 01:43:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:46,101 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 470 transitions. [2021-11-07 01:43:46,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 470 transitions. [2021-11-07 01:43:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:43:46,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:46,103 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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:46,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:43:46,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash -759675733, now seen corresponding path program 1 times [2021-11-07 01:43:46,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:46,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372626405] [2021-11-07 01:43:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:46,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:46,242 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 01:43:46,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:46,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372626405] [2021-11-07 01:43:46,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372626405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:46,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:46,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:46,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567270825] [2021-11-07 01:43:46,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:46,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:46,247 INFO L87 Difference]: Start difference. First operand 371 states and 470 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 01:43:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:46,610 INFO L93 Difference]: Finished difference Result 684 states and 881 transitions. [2021-11-07 01:43:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:43:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:46,614 INFO L225 Difference]: With dead ends: 684 [2021-11-07 01:43:46,614 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 01:43:46,615 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 01:43:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 01:43:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2021-11-07 01:43:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.322857142857143) internal successors, (463), 365 states have internal predecessors, (463), 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 01:43:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 463 transitions. [2021-11-07 01:43:46,643 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 463 transitions. Word has length 74 [2021-11-07 01:43:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:46,644 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 463 transitions. [2021-11-07 01:43:46,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 01:43:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 463 transitions. [2021-11-07 01:43:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:43:46,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:46,647 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:46,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:43:46,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1130154961, now seen corresponding path program 1 times [2021-11-07 01:43:46,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:46,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401540003] [2021-11-07 01:43:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:46,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:46,785 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 01:43:46,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:46,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401540003] [2021-11-07 01:43:46,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401540003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:46,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:46,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:43:46,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053171146] [2021-11-07 01:43:46,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:43:46,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:43:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:43:46,788 INFO L87 Difference]: Start difference. First operand 366 states and 463 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:47,412 INFO L93 Difference]: Finished difference Result 684 states and 838 transitions. [2021-11-07 01:43:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:43:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:43:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:47,417 INFO L225 Difference]: With dead ends: 684 [2021-11-07 01:43:47,417 INFO L226 Difference]: Without dead ends: 495 [2021-11-07 01:43:47,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:43:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-07 01:43:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 366. [2021-11-07 01:43:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.32) internal successors, (462), 365 states have internal predecessors, (462), 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 01:43:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 462 transitions. [2021-11-07 01:43:47,480 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 462 transitions. Word has length 75 [2021-11-07 01:43:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:47,481 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 462 transitions. [2021-11-07 01:43:47,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 462 transitions. [2021-11-07 01:43:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:43:47,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:47,488 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:47,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:43:47,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash 496363608, now seen corresponding path program 1 times [2021-11-07 01:43:47,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:47,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298697740] [2021-11-07 01:43:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:47,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:47,713 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 01:43:47,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:47,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298697740] [2021-11-07 01:43:47,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298697740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:47,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:47,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:43:47,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684736803] [2021-11-07 01:43:47,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:43:47,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:43:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:43:47,717 INFO L87 Difference]: Start difference. First operand 366 states and 462 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:48,982 INFO L93 Difference]: Finished difference Result 788 states and 999 transitions. [2021-11-07 01:43:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:43:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:43:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:48,987 INFO L225 Difference]: With dead ends: 788 [2021-11-07 01:43:48,987 INFO L226 Difference]: Without dead ends: 713 [2021-11-07 01:43:48,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:43:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-07 01:43:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 369. [2021-11-07 01:43:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 353 states have (on average 1.3172804532577904) internal successors, (465), 368 states have internal predecessors, (465), 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 01:43:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 465 transitions. [2021-11-07 01:43:49,044 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 465 transitions. Word has length 75 [2021-11-07 01:43:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:49,044 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 465 transitions. [2021-11-07 01:43:49,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 465 transitions. [2021-11-07 01:43:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:43:49,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:49,046 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:49,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:43:49,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash 87518380, now seen corresponding path program 1 times [2021-11-07 01:43:49,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:49,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236733483] [2021-11-07 01:43:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:49,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:49,235 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 01:43:49,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:49,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236733483] [2021-11-07 01:43:49,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236733483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:49,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:49,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:49,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280345209] [2021-11-07 01:43:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:49,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:49,242 INFO L87 Difference]: Start difference. First operand 369 states and 465 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:50,371 INFO L93 Difference]: Finished difference Result 747 states and 952 transitions. [2021-11-07 01:43:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:43:50,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:43:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:50,376 INFO L225 Difference]: With dead ends: 747 [2021-11-07 01:43:50,376 INFO L226 Difference]: Without dead ends: 642 [2021-11-07 01:43:50,377 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 01:43:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-07 01:43:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 366. [2021-11-07 01:43:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.3171428571428572) internal successors, (461), 365 states have internal predecessors, (461), 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 01:43:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 461 transitions. [2021-11-07 01:43:50,414 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 461 transitions. Word has length 75 [2021-11-07 01:43:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:50,417 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 461 transitions. [2021-11-07 01:43:50,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 461 transitions. [2021-11-07 01:43:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:43:50,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:50,419 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:50,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:43:50,420 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1385408418, now seen corresponding path program 1 times [2021-11-07 01:43:50,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:50,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108956097] [2021-11-07 01:43:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:50,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:50,595 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 01:43:50,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:50,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108956097] [2021-11-07 01:43:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108956097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:50,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:50,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:50,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334720177] [2021-11-07 01:43:50,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:50,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:50,605 INFO L87 Difference]: Start difference. First operand 366 states and 461 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:51,691 INFO L93 Difference]: Finished difference Result 704 states and 897 transitions. [2021-11-07 01:43:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:43:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:43:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:51,696 INFO L225 Difference]: With dead ends: 704 [2021-11-07 01:43:51,696 INFO L226 Difference]: Without dead ends: 638 [2021-11-07 01:43:51,697 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 01:43:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-07 01:43:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 366. [2021-11-07 01:43:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.3142857142857143) internal successors, (460), 365 states have internal predecessors, (460), 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 01:43:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 460 transitions. [2021-11-07 01:43:51,734 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 460 transitions. Word has length 75 [2021-11-07 01:43:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:51,734 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 460 transitions. [2021-11-07 01:43:51,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 460 transitions. [2021-11-07 01:43:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:51,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:51,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:43:51,737 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash -821108329, now seen corresponding path program 1 times [2021-11-07 01:43:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:51,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054817881] [2021-11-07 01:43:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:51,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:51,893 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 01:43:51,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:51,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054817881] [2021-11-07 01:43:51,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054817881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:51,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:51,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:51,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148404777] [2021-11-07 01:43:51,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:51,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:51,897 INFO L87 Difference]: Start difference. First operand 366 states and 460 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:52,887 INFO L93 Difference]: Finished difference Result 713 states and 905 transitions. [2021-11-07 01:43:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:43:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 77 [2021-11-07 01:43:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:52,892 INFO L225 Difference]: With dead ends: 713 [2021-11-07 01:43:52,892 INFO L226 Difference]: Without dead ends: 638 [2021-11-07 01:43:52,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:43:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-07 01:43:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 366. [2021-11-07 01:43:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.3114285714285714) internal successors, (459), 365 states have internal predecessors, (459), 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 01:43:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 459 transitions. [2021-11-07 01:43:52,927 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 459 transitions. Word has length 77 [2021-11-07 01:43:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 459 transitions. [2021-11-07 01:43:52,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 459 transitions. [2021-11-07 01:43:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:52,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:52,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:52,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:43:52,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1229953557, now seen corresponding path program 1 times [2021-11-07 01:43:52,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:52,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879306620] [2021-11-07 01:43:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:52,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:53,057 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 01:43:53,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:53,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879306620] [2021-11-07 01:43:53,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879306620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:53,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:53,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:53,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664727773] [2021-11-07 01:43:53,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:53,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:53,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:53,060 INFO L87 Difference]: Start difference. First operand 366 states and 459 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:54,040 INFO L93 Difference]: Finished difference Result 683 states and 860 transitions. [2021-11-07 01:43:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:43:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 77 [2021-11-07 01:43:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:54,044 INFO L225 Difference]: With dead ends: 683 [2021-11-07 01:43:54,044 INFO L226 Difference]: Without dead ends: 630 [2021-11-07 01:43:54,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:43:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-07 01:43:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 366. [2021-11-07 01:43:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.3085714285714285) internal successors, (458), 365 states have internal predecessors, (458), 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 01:43:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 458 transitions. [2021-11-07 01:43:54,081 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 458 transitions. Word has length 77 [2021-11-07 01:43:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:54,082 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 458 transitions. [2021-11-07 01:43:54,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 458 transitions. [2021-11-07 01:43:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:54,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:54,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:54,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:43:54,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash -861851382, now seen corresponding path program 1 times [2021-11-07 01:43:54,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:54,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129245783] [2021-11-07 01:43:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:54,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:54,298 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 01:43:54,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:54,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129245783] [2021-11-07 01:43:54,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129245783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:54,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:54,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:43:54,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099474185] [2021-11-07 01:43:54,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:43:54,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:54,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:43:54,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:43:54,301 INFO L87 Difference]: Start difference. First operand 366 states and 458 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 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 01:43:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:56,318 INFO L93 Difference]: Finished difference Result 936 states and 1193 transitions. [2021-11-07 01:43:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:43:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 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 77 [2021-11-07 01:43:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:56,324 INFO L225 Difference]: With dead ends: 936 [2021-11-07 01:43:56,324 INFO L226 Difference]: Without dead ends: 883 [2021-11-07 01:43:56,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:43:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-07 01:43:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 370. [2021-11-07 01:43:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.305084745762712) internal successors, (462), 369 states have internal predecessors, (462), 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 01:43:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 462 transitions. [2021-11-07 01:43:56,371 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 462 transitions. Word has length 77 [2021-11-07 01:43:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:56,371 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 462 transitions. [2021-11-07 01:43:56,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 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 01:43:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 462 transitions. [2021-11-07 01:43:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:56,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:56,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:56,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:43:56,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1582421198, now seen corresponding path program 1 times [2021-11-07 01:43:56,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:56,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443308090] [2021-11-07 01:43:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:56,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:56,483 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 01:43:56,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:56,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443308090] [2021-11-07 01:43:56,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443308090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:56,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:56,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:56,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252445339] [2021-11-07 01:43:56,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:56,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:56,486 INFO L87 Difference]: Start difference. First operand 370 states and 462 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:57,329 INFO L93 Difference]: Finished difference Result 679 states and 854 transitions. [2021-11-07 01:43:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:43:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 77 [2021-11-07 01:43:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:57,334 INFO L225 Difference]: With dead ends: 679 [2021-11-07 01:43:57,334 INFO L226 Difference]: Without dead ends: 630 [2021-11-07 01:43:57,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:43:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-07 01:43:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 370. [2021-11-07 01:43:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.3022598870056497) internal successors, (461), 369 states have internal predecessors, (461), 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 01:43:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 461 transitions. [2021-11-07 01:43:57,378 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 461 transitions. Word has length 77 [2021-11-07 01:43:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:57,379 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 461 transitions. [2021-11-07 01:43:57,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 461 transitions. [2021-11-07 01:43:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:57,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:57,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:57,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:43:57,381 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 981154930, now seen corresponding path program 1 times [2021-11-07 01:43:57,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:57,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076842950] [2021-11-07 01:43:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:57,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:57,484 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 01:43:57,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:57,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076842950] [2021-11-07 01:43:57,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076842950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:57,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:57,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:57,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259383468] [2021-11-07 01:43:57,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:57,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:57,487 INFO L87 Difference]: Start difference. First operand 370 states and 461 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:58,496 INFO L93 Difference]: Finished difference Result 766 states and 965 transitions. [2021-11-07 01:43:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:43:58,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 77 [2021-11-07 01:43:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:58,503 INFO L225 Difference]: With dead ends: 766 [2021-11-07 01:43:58,503 INFO L226 Difference]: Without dead ends: 646 [2021-11-07 01:43:58,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:43:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-07 01:43:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 370. [2021-11-07 01:43:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2994350282485876) internal successors, (460), 369 states have internal predecessors, (460), 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 01:43:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 460 transitions. [2021-11-07 01:43:58,552 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 460 transitions. Word has length 77 [2021-11-07 01:43:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:58,553 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 460 transitions. [2021-11-07 01:43:58,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 460 transitions. [2021-11-07 01:43:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:58,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:58,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:58,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:43:58,556 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash -817405268, now seen corresponding path program 1 times [2021-11-07 01:43:58,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:58,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416341413] [2021-11-07 01:43:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:58,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:58,730 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 01:43:58,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:58,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416341413] [2021-11-07 01:43:58,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416341413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:58,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:58,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:43:58,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987140867] [2021-11-07 01:43:58,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:58,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:58,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:58,733 INFO L87 Difference]: Start difference. First operand 370 states and 460 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:59,859 INFO L93 Difference]: Finished difference Result 683 states and 855 transitions. [2021-11-07 01:43:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:43:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 77 [2021-11-07 01:43:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:59,863 INFO L225 Difference]: With dead ends: 683 [2021-11-07 01:43:59,864 INFO L226 Difference]: Without dead ends: 630 [2021-11-07 01:43:59,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:43:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-07 01:43:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 370. [2021-11-07 01:43:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2966101694915255) internal successors, (459), 369 states have internal predecessors, (459), 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 01:43:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 459 transitions. [2021-11-07 01:43:59,912 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 459 transitions. Word has length 77 [2021-11-07 01:43:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:59,913 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 459 transitions. [2021-11-07 01:43:59,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:43:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 459 transitions. [2021-11-07 01:43:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:43:59,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:59,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:59,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:43:59,916 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:43:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash -408560040, now seen corresponding path program 1 times [2021-11-07 01:43:59,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:59,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061128269] [2021-11-07 01:43:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:59,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:00,071 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 01:44:00,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:00,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061128269] [2021-11-07 01:44:00,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061128269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:00,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:00,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:00,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776030290] [2021-11-07 01:44:00,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:00,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:00,076 INFO L87 Difference]: Start difference. First operand 370 states and 459 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:44:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:01,140 INFO L93 Difference]: Finished difference Result 717 states and 900 transitions. [2021-11-07 01:44:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:01,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 77 [2021-11-07 01:44:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:01,144 INFO L225 Difference]: With dead ends: 717 [2021-11-07 01:44:01,144 INFO L226 Difference]: Without dead ends: 642 [2021-11-07 01:44:01,145 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 01:44:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-07 01:44:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 370. [2021-11-07 01:44:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2937853107344632) internal successors, (458), 369 states have internal predecessors, (458), 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 01:44:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 458 transitions. [2021-11-07 01:44:01,194 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 458 transitions. Word has length 77 [2021-11-07 01:44:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:01,195 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 458 transitions. [2021-11-07 01:44:01,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 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 01:44:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 458 transitions. [2021-11-07 01:44:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:44:01,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:01,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:01,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:44:01,197 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash -180251782, now seen corresponding path program 1 times [2021-11-07 01:44:01,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:01,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740297480] [2021-11-07 01:44:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:01,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:01,330 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 01:44:01,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:01,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740297480] [2021-11-07 01:44:01,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740297480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:01,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:01,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:01,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282823046] [2021-11-07 01:44:01,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:01,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:01,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:01,332 INFO L87 Difference]: Start difference. First operand 370 states and 458 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:02,233 INFO L93 Difference]: Finished difference Result 683 states and 853 transitions. [2021-11-07 01:44:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:44:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:02,237 INFO L225 Difference]: With dead ends: 683 [2021-11-07 01:44:02,237 INFO L226 Difference]: Without dead ends: 630 [2021-11-07 01:44:02,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-07 01:44:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 366. [2021-11-07 01:44:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.2942857142857143) internal successors, (453), 365 states have internal predecessors, (453), 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 01:44:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 453 transitions. [2021-11-07 01:44:02,289 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 453 transitions. Word has length 78 [2021-11-07 01:44:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:02,289 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 453 transitions. [2021-11-07 01:44:02,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 453 transitions. [2021-11-07 01:44:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:02,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:02,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:02,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:44:02,292 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1887565433, now seen corresponding path program 1 times [2021-11-07 01:44:02,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:02,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34021908] [2021-11-07 01:44:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:02,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:02,409 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 01:44:02,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:02,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34021908] [2021-11-07 01:44:02,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34021908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:02,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:02,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:02,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799686006] [2021-11-07 01:44:02,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:02,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:02,412 INFO L87 Difference]: Start difference. First operand 366 states and 453 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:03,294 INFO L93 Difference]: Finished difference Result 657 states and 813 transitions. [2021-11-07 01:44:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:03,308 INFO L225 Difference]: With dead ends: 657 [2021-11-07 01:44:03,308 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:03,309 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 01:44:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 366. [2021-11-07 01:44:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.2914285714285714) internal successors, (452), 365 states have internal predecessors, (452), 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 01:44:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 452 transitions. [2021-11-07 01:44:03,361 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 452 transitions. Word has length 79 [2021-11-07 01:44:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:03,362 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 452 transitions. [2021-11-07 01:44:03,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 452 transitions. [2021-11-07 01:44:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:03,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:03,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:03,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:44:03,364 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1141656959, now seen corresponding path program 1 times [2021-11-07 01:44:03,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:03,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695967247] [2021-11-07 01:44:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:03,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:03,547 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 01:44:03,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:03,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695967247] [2021-11-07 01:44:03,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695967247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:03,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:44:03,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377110655] [2021-11-07 01:44:03,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:44:03,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:44:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:03,551 INFO L87 Difference]: Start difference. First operand 366 states and 452 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:05,450 INFO L93 Difference]: Finished difference Result 876 states and 1100 transitions. [2021-11-07 01:44:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:44:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:05,454 INFO L225 Difference]: With dead ends: 876 [2021-11-07 01:44:05,454 INFO L226 Difference]: Without dead ends: 830 [2021-11-07 01:44:05,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:44:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-07 01:44:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 370. [2021-11-07 01:44:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2881355932203389) internal successors, (456), 369 states have internal predecessors, (456), 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 01:44:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 456 transitions. [2021-11-07 01:44:05,519 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 456 transitions. Word has length 79 [2021-11-07 01:44:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:05,520 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 456 transitions. [2021-11-07 01:44:05,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 456 transitions. [2021-11-07 01:44:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:05,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:05,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:05,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:44:05,522 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1896793534, now seen corresponding path program 1 times [2021-11-07 01:44:05,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:05,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664808379] [2021-11-07 01:44:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:05,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:05,689 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 01:44:05,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:05,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664808379] [2021-11-07 01:44:05,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664808379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:05,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:05,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:05,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828119012] [2021-11-07 01:44:05,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:05,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:05,693 INFO L87 Difference]: Start difference. First operand 370 states and 456 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:06,736 INFO L93 Difference]: Finished difference Result 660 states and 814 transitions. [2021-11-07 01:44:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:06,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:06,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:06,739 INFO L225 Difference]: With dead ends: 660 [2021-11-07 01:44:06,740 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:06,740 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 01:44:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 370. [2021-11-07 01:44:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2853107344632768) internal successors, (455), 369 states have internal predecessors, (455), 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 01:44:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 455 transitions. [2021-11-07 01:44:06,804 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 455 transitions. Word has length 79 [2021-11-07 01:44:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:06,805 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 455 transitions. [2021-11-07 01:44:06,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 455 transitions. [2021-11-07 01:44:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:06,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:06,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:06,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:44:06,808 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:06,808 INFO L85 PathProgramCache]: Analyzing trace with hash -485976660, now seen corresponding path program 1 times [2021-11-07 01:44:06,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:06,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188200613] [2021-11-07 01:44:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:06,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:06,931 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 01:44:06,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:06,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188200613] [2021-11-07 01:44:06,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188200613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:06,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:06,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:06,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339702929] [2021-11-07 01:44:06,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:06,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:06,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:06,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:06,935 INFO L87 Difference]: Start difference. First operand 370 states and 455 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:08,001 INFO L93 Difference]: Finished difference Result 692 states and 858 transitions. [2021-11-07 01:44:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:08,005 INFO L225 Difference]: With dead ends: 692 [2021-11-07 01:44:08,005 INFO L226 Difference]: Without dead ends: 634 [2021-11-07 01:44:08,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-07 01:44:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 370. [2021-11-07 01:44:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2824858757062148) internal successors, (454), 369 states have internal predecessors, (454), 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 01:44:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 454 transitions. [2021-11-07 01:44:08,063 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 454 transitions. Word has length 79 [2021-11-07 01:44:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:08,064 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 454 transitions. [2021-11-07 01:44:08,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 454 transitions. [2021-11-07 01:44:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:08,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:08,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:08,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:44:08,066 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash -328806928, now seen corresponding path program 1 times [2021-11-07 01:44:08,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:08,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909637752] [2021-11-07 01:44:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:08,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:08,180 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 01:44:08,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:08,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909637752] [2021-11-07 01:44:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909637752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:08,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:08,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:08,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301272366] [2021-11-07 01:44:08,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:08,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:08,182 INFO L87 Difference]: Start difference. First operand 370 states and 454 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:09,350 INFO L93 Difference]: Finished difference Result 657 states and 809 transitions. [2021-11-07 01:44:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:09,353 INFO L225 Difference]: With dead ends: 657 [2021-11-07 01:44:09,353 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:09,354 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 01:44:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 370. [2021-11-07 01:44:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2796610169491525) internal successors, (453), 369 states have internal predecessors, (453), 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 01:44:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 453 transitions. [2021-11-07 01:44:09,402 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 453 transitions. Word has length 79 [2021-11-07 01:44:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:09,403 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 453 transitions. [2021-11-07 01:44:09,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 453 transitions. [2021-11-07 01:44:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:09,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:09,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:09,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:44:09,405 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:09,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1594434658, now seen corresponding path program 1 times [2021-11-07 01:44:09,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:09,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349664946] [2021-11-07 01:44:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:09,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:09,599 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 01:44:09,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:09,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349664946] [2021-11-07 01:44:09,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349664946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:09,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:09,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:44:09,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032426027] [2021-11-07 01:44:09,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:44:09,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:44:09,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:09,601 INFO L87 Difference]: Start difference. First operand 370 states and 453 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:11,416 INFO L93 Difference]: Finished difference Result 835 states and 1040 transitions. [2021-11-07 01:44:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:44:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:11,420 INFO L225 Difference]: With dead ends: 835 [2021-11-07 01:44:11,421 INFO L226 Difference]: Without dead ends: 830 [2021-11-07 01:44:11,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:44:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-07 01:44:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 374. [2021-11-07 01:44:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 358 states have (on average 1.276536312849162) internal successors, (457), 373 states have internal predecessors, (457), 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 01:44:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 457 transitions. [2021-11-07 01:44:11,479 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 457 transitions. Word has length 79 [2021-11-07 01:44:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:11,480 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 457 transitions. [2021-11-07 01:44:11,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 457 transitions. [2021-11-07 01:44:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:11,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:11,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:11,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:44:11,483 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 319887148, now seen corresponding path program 1 times [2021-11-07 01:44:11,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:11,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868811802] [2021-11-07 01:44:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:11,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:11,679 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 01:44:11,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:11,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868811802] [2021-11-07 01:44:11,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868811802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:11,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:11,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:44:11,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743086350] [2021-11-07 01:44:11,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:44:11,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:44:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:11,682 INFO L87 Difference]: Start difference. First operand 374 states and 457 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:13,572 INFO L93 Difference]: Finished difference Result 876 states and 1098 transitions. [2021-11-07 01:44:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:44:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:13,576 INFO L225 Difference]: With dead ends: 876 [2021-11-07 01:44:13,576 INFO L226 Difference]: Without dead ends: 833 [2021-11-07 01:44:13,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:44:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-07 01:44:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 378. [2021-11-07 01:44:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2734806629834254) internal successors, (461), 377 states have internal predecessors, (461), 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 01:44:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 461 transitions. [2021-11-07 01:44:13,624 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 461 transitions. Word has length 79 [2021-11-07 01:44:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:13,625 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 461 transitions. [2021-11-07 01:44:13,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 461 transitions. [2021-11-07 01:44:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:13,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:13,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:44:13,627 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1334706002, now seen corresponding path program 1 times [2021-11-07 01:44:13,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:13,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802467224] [2021-11-07 01:44:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:13,736 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 01:44:13,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:13,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802467224] [2021-11-07 01:44:13,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802467224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:13,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:13,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:13,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520882549] [2021-11-07 01:44:13,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:13,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:13,738 INFO L87 Difference]: Start difference. First operand 378 states and 461 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:14,652 INFO L93 Difference]: Finished difference Result 655 states and 804 transitions. [2021-11-07 01:44:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:14,655 INFO L225 Difference]: With dead ends: 655 [2021-11-07 01:44:14,655 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:14,655 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 01:44:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:14,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 378. [2021-11-07 01:44:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.270718232044199) internal successors, (460), 377 states have internal predecessors, (460), 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 01:44:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 460 transitions. [2021-11-07 01:44:14,702 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 460 transitions. Word has length 79 [2021-11-07 01:44:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:14,702 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 460 transitions. [2021-11-07 01:44:14,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 460 transitions. [2021-11-07 01:44:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:14,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:14,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:14,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:44:14,703 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1154349460, now seen corresponding path program 1 times [2021-11-07 01:44:14,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:14,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85481033] [2021-11-07 01:44:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:14,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:14,810 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 01:44:14,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:14,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85481033] [2021-11-07 01:44:14,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85481033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:14,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:14,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:14,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011599098] [2021-11-07 01:44:14,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:14,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:14,813 INFO L87 Difference]: Start difference. First operand 378 states and 460 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:15,632 INFO L93 Difference]: Finished difference Result 704 states and 865 transitions. [2021-11-07 01:44:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:15,636 INFO L225 Difference]: With dead ends: 704 [2021-11-07 01:44:15,636 INFO L226 Difference]: Without dead ends: 646 [2021-11-07 01:44:15,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-07 01:44:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 378. [2021-11-07 01:44:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2679558011049723) internal successors, (459), 377 states have internal predecessors, (459), 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 01:44:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 459 transitions. [2021-11-07 01:44:15,708 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 459 transitions. Word has length 79 [2021-11-07 01:44:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 459 transitions. [2021-11-07 01:44:15,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 459 transitions. [2021-11-07 01:44:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:15,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:15,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:15,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:44:15,710 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1228420734, now seen corresponding path program 1 times [2021-11-07 01:44:15,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:15,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391313476] [2021-11-07 01:44:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:15,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:15,817 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 01:44:15,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:15,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391313476] [2021-11-07 01:44:15,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391313476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:15,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:15,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:15,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862735664] [2021-11-07 01:44:15,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:15,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:15,820 INFO L87 Difference]: Start difference. First operand 378 states and 459 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:16,928 INFO L93 Difference]: Finished difference Result 660 states and 807 transitions. [2021-11-07 01:44:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:16,931 INFO L225 Difference]: With dead ends: 660 [2021-11-07 01:44:16,931 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:16,932 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 01:44:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 378. [2021-11-07 01:44:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2651933701657458) internal successors, (458), 377 states have internal predecessors, (458), 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 01:44:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 458 transitions. [2021-11-07 01:44:16,988 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 458 transitions. Word has length 79 [2021-11-07 01:44:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:16,988 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 458 transitions. [2021-11-07 01:44:16,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 458 transitions. [2021-11-07 01:44:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:16,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:16,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:16,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:44:16,991 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash -327266232, now seen corresponding path program 1 times [2021-11-07 01:44:16,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:16,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612536385] [2021-11-07 01:44:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:16,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:17,096 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 01:44:17,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:17,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612536385] [2021-11-07 01:44:17,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612536385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:17,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:17,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:17,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52607760] [2021-11-07 01:44:17,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:17,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:17,099 INFO L87 Difference]: Start difference. First operand 378 states and 458 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:18,066 INFO L93 Difference]: Finished difference Result 735 states and 905 transitions. [2021-11-07 01:44:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:18,069 INFO L225 Difference]: With dead ends: 735 [2021-11-07 01:44:18,070 INFO L226 Difference]: Without dead ends: 654 [2021-11-07 01:44:18,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-07 01:44:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 378. [2021-11-07 01:44:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2624309392265194) internal successors, (457), 377 states have internal predecessors, (457), 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 01:44:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 457 transitions. [2021-11-07 01:44:18,137 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 457 transitions. Word has length 79 [2021-11-07 01:44:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:18,138 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 457 transitions. [2021-11-07 01:44:18,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 457 transitions. [2021-11-07 01:44:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:18,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:18,139 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 01:44:18,140 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1076267745, now seen corresponding path program 1 times [2021-11-07 01:44:18,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:18,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756687722] [2021-11-07 01:44:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:18,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:18,271 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 01:44:18,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:18,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756687722] [2021-11-07 01:44:18,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756687722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:18,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:18,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:18,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707528410] [2021-11-07 01:44:18,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:18,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:18,274 INFO L87 Difference]: Start difference. First operand 378 states and 457 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:19,192 INFO L93 Difference]: Finished difference Result 619 states and 750 transitions. [2021-11-07 01:44:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:19,195 INFO L225 Difference]: With dead ends: 619 [2021-11-07 01:44:19,195 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:19,196 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 01:44:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 378. [2021-11-07 01:44:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2596685082872927) internal successors, (456), 377 states have internal predecessors, (456), 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 01:44:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 456 transitions. [2021-11-07 01:44:19,271 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 456 transitions. Word has length 79 [2021-11-07 01:44:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:19,271 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 456 transitions. [2021-11-07 01:44:19,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 456 transitions. [2021-11-07 01:44:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:19,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:19,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:19,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 01:44:19,273 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:19,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash 835929357, now seen corresponding path program 1 times [2021-11-07 01:44:19,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:19,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938969134] [2021-11-07 01:44:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:19,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:19,373 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 01:44:19,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:19,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938969134] [2021-11-07 01:44:19,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938969134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:19,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:19,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:19,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88473568] [2021-11-07 01:44:19,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:19,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:19,376 INFO L87 Difference]: Start difference. First operand 378 states and 456 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:20,433 INFO L93 Difference]: Finished difference Result 663 states and 805 transitions. [2021-11-07 01:44:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:20,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:20,436 INFO L225 Difference]: With dead ends: 663 [2021-11-07 01:44:20,436 INFO L226 Difference]: Without dead ends: 646 [2021-11-07 01:44:20,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-07 01:44:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 378. [2021-11-07 01:44:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2569060773480663) internal successors, (455), 377 states have internal predecessors, (455), 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 01:44:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 455 transitions. [2021-11-07 01:44:20,497 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 455 transitions. Word has length 79 [2021-11-07 01:44:20,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:20,498 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 455 transitions. [2021-11-07 01:44:20,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 455 transitions. [2021-11-07 01:44:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:20,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:20,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:20,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 01:44:20,500 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -565396271, now seen corresponding path program 1 times [2021-11-07 01:44:20,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:20,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244734857] [2021-11-07 01:44:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:20,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:20,606 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 01:44:20,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:20,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244734857] [2021-11-07 01:44:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244734857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:20,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:20,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:20,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769567890] [2021-11-07 01:44:20,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:20,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:20,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:20,609 INFO L87 Difference]: Start difference. First operand 378 states and 455 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:21,596 INFO L93 Difference]: Finished difference Result 657 states and 800 transitions. [2021-11-07 01:44:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:21,599 INFO L225 Difference]: With dead ends: 657 [2021-11-07 01:44:21,600 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:21,600 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 01:44:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 378. [2021-11-07 01:44:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2541436464088398) internal successors, (454), 377 states have internal predecessors, (454), 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 01:44:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 454 transitions. [2021-11-07 01:44:21,657 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 454 transitions. Word has length 79 [2021-11-07 01:44:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:21,657 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 454 transitions. [2021-11-07 01:44:21,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 454 transitions. [2021-11-07 01:44:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:21,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:21,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 01:44:21,659 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1831404320, now seen corresponding path program 1 times [2021-11-07 01:44:21,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:21,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944350094] [2021-11-07 01:44:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:21,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:21,768 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 01:44:21,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:21,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944350094] [2021-11-07 01:44:21,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944350094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:21,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:21,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:21,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556645253] [2021-11-07 01:44:21,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:21,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:21,771 INFO L87 Difference]: Start difference. First operand 378 states and 454 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:22,727 INFO L93 Difference]: Finished difference Result 619 states and 747 transitions. [2021-11-07 01:44:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:22,730 INFO L225 Difference]: With dead ends: 619 [2021-11-07 01:44:22,730 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:22,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 378. [2021-11-07 01:44:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 362 states have (on average 1.2513812154696133) internal successors, (453), 377 states have internal predecessors, (453), 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 01:44:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 453 transitions. [2021-11-07 01:44:22,781 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 453 transitions. Word has length 79 [2021-11-07 01:44:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:22,782 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 453 transitions. [2021-11-07 01:44:22,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 453 transitions. [2021-11-07 01:44:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:44:22,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:22,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:22,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 01:44:22,784 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash 765459719, now seen corresponding path program 1 times [2021-11-07 01:44:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:22,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401339030] [2021-11-07 01:44:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:22,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:22,882 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 01:44:22,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:22,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401339030] [2021-11-07 01:44:22,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401339030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:22,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:22,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:22,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271550611] [2021-11-07 01:44:22,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:22,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:22,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:22,884 INFO L87 Difference]: Start difference. First operand 378 states and 453 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 01:44:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:23,947 INFO L93 Difference]: Finished difference Result 660 states and 800 transitions. [2021-11-07 01:44:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2021-11-07 01:44:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:23,951 INFO L225 Difference]: With dead ends: 660 [2021-11-07 01:44:23,951 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:23,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 374. [2021-11-07 01:44:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 358 states have (on average 1.2513966480446927) internal successors, (448), 373 states have internal predecessors, (448), 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 01:44:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 448 transitions. [2021-11-07 01:44:24,031 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 448 transitions. Word has length 80 [2021-11-07 01:44:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:24,031 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 448 transitions. [2021-11-07 01:44:24,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 01:44:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 448 transitions. [2021-11-07 01:44:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:44:24,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:24,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:24,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 01:44:24,033 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:24,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1845965630, now seen corresponding path program 1 times [2021-11-07 01:44:24,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:24,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615711385] [2021-11-07 01:44:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:24,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:24,125 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 01:44:24,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:24,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615711385] [2021-11-07 01:44:24,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615711385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:24,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:24,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:24,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380797047] [2021-11-07 01:44:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:24,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:24,127 INFO L87 Difference]: Start difference. First operand 374 states and 448 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 01:44:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:25,031 INFO L93 Difference]: Finished difference Result 619 states and 744 transitions. [2021-11-07 01:44:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2021-11-07 01:44:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:25,034 INFO L225 Difference]: With dead ends: 619 [2021-11-07 01:44:25,034 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:25,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 370. [2021-11-07 01:44:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 354 states have (on average 1.2514124293785311) internal successors, (443), 369 states have internal predecessors, (443), 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 01:44:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 443 transitions. [2021-11-07 01:44:25,097 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 443 transitions. Word has length 80 [2021-11-07 01:44:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:25,097 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 443 transitions. [2021-11-07 01:44:25,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 01:44:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 443 transitions. [2021-11-07 01:44:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:44:25,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:25,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:25,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 01:44:25,098 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1550856203, now seen corresponding path program 1 times [2021-11-07 01:44:25,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:25,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459936378] [2021-11-07 01:44:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:25,194 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 01:44:25,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:25,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459936378] [2021-11-07 01:44:25,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459936378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:25,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:25,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091194914] [2021-11-07 01:44:25,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:25,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:25,197 INFO L87 Difference]: Start difference. First operand 370 states and 443 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 01:44:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:26,138 INFO L93 Difference]: Finished difference Result 657 states and 795 transitions. [2021-11-07 01:44:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2021-11-07 01:44:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:26,141 INFO L225 Difference]: With dead ends: 657 [2021-11-07 01:44:26,141 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:44:26,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:44:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 366. [2021-11-07 01:44:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 350 states have (on average 1.2514285714285713) internal successors, (438), 365 states have internal predecessors, (438), 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 01:44:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 438 transitions. [2021-11-07 01:44:26,203 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 438 transitions. Word has length 80 [2021-11-07 01:44:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:26,203 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 438 transitions. [2021-11-07 01:44:26,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 01:44:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 438 transitions. [2021-11-07 01:44:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:26,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:26,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:26,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 01:44:26,214 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:26,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1961223322, now seen corresponding path program 1 times [2021-11-07 01:44:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:26,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240485109] [2021-11-07 01:44:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:26,526 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 01:44:26,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:26,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240485109] [2021-11-07 01:44:26,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240485109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:26,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:26,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:44:26,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84876972] [2021-11-07 01:44:26,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:44:26,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:44:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:44:26,530 INFO L87 Difference]: Start difference. First operand 366 states and 438 transitions. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 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 01:44:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:27,715 INFO L93 Difference]: Finished difference Result 865 states and 1033 transitions. [2021-11-07 01:44:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:44:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 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 81 [2021-11-07 01:44:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:27,720 INFO L225 Difference]: With dead ends: 865 [2021-11-07 01:44:27,721 INFO L226 Difference]: Without dead ends: 707 [2021-11-07 01:44:27,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-07 01:44:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 249. [2021-11-07 01:44:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 238 states have (on average 1.2226890756302522) internal successors, (291), 248 states have internal predecessors, (291), 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 01:44:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 291 transitions. [2021-11-07 01:44:27,821 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 291 transitions. Word has length 81 [2021-11-07 01:44:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:27,821 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 291 transitions. [2021-11-07 01:44:27,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 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 01:44:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 291 transitions. [2021-11-07 01:44:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:27,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:27,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:27,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-07 01:44:27,823 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1832785083, now seen corresponding path program 1 times [2021-11-07 01:44:27,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:27,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688697043] [2021-11-07 01:44:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:27,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:28,259 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 01:44:28,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:28,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688697043] [2021-11-07 01:44:28,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688697043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:28,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:28,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:44:28,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704981544] [2021-11-07 01:44:28,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:28,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:28,261 INFO L87 Difference]: Start difference. First operand 249 states and 291 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 01:44:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:29,088 INFO L93 Difference]: Finished difference Result 411 states and 483 transitions. [2021-11-07 01:44:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 81 [2021-11-07 01:44:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:29,090 INFO L225 Difference]: With dead ends: 411 [2021-11-07 01:44:29,090 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 01:44:29,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 01:44:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 245. [2021-11-07 01:44:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 235 states have (on average 1.2170212765957447) internal successors, (286), 244 states have internal predecessors, (286), 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 01:44:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 286 transitions. [2021-11-07 01:44:29,152 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 286 transitions. Word has length 81 [2021-11-07 01:44:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:29,152 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 286 transitions. [2021-11-07 01:44:29,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 01:44:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 286 transitions. [2021-11-07 01:44:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:29,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:29,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:29,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-07 01:44:29,154 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash 52267935, now seen corresponding path program 1 times [2021-11-07 01:44:29,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:29,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654747408] [2021-11-07 01:44:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:29,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:30,158 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 01:44:30,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:30,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654747408] [2021-11-07 01:44:30,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654747408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:30,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-07 01:44:30,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150667829] [2021-11-07 01:44:30,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 01:44:30,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 01:44:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:44:30,161 INFO L87 Difference]: Start difference. First operand 245 states and 286 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 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 01:44:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:35,603 INFO L93 Difference]: Finished difference Result 1025 states and 1228 transitions. [2021-11-07 01:44:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 01:44:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 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 81 [2021-11-07 01:44:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:35,607 INFO L225 Difference]: With dead ends: 1025 [2021-11-07 01:44:35,607 INFO L226 Difference]: Without dead ends: 977 [2021-11-07 01:44:35,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=370, Invalid=2080, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 01:44:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-07 01:44:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 264. [2021-11-07 01:44:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 254 states have (on average 1.220472440944882) internal successors, (310), 263 states have internal predecessors, (310), 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 01:44:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 310 transitions. [2021-11-07 01:44:35,667 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 310 transitions. Word has length 81 [2021-11-07 01:44:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:35,667 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 310 transitions. [2021-11-07 01:44:35,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 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 01:44:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 310 transitions. [2021-11-07 01:44:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:35,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:35,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:35,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-07 01:44:35,669 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1340490679, now seen corresponding path program 1 times [2021-11-07 01:44:35,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:35,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996190540] [2021-11-07 01:44:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:35,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:36,018 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 01:44:36,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:36,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996190540] [2021-11-07 01:44:36,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996190540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:36,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:36,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:44:36,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4059987] [2021-11-07 01:44:36,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:36,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:36,020 INFO L87 Difference]: Start difference. First operand 264 states and 310 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 01:44:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:36,880 INFO L93 Difference]: Finished difference Result 418 states and 494 transitions. [2021-11-07 01:44:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:44:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 81 [2021-11-07 01:44:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:36,882 INFO L225 Difference]: With dead ends: 418 [2021-11-07 01:44:36,882 INFO L226 Difference]: Without dead ends: 373 [2021-11-07 01:44:36,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:44:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-07 01:44:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 260. [2021-11-07 01:44:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 251 states have (on average 1.2151394422310757) internal successors, (305), 259 states have internal predecessors, (305), 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 01:44:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 305 transitions. [2021-11-07 01:44:36,942 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 305 transitions. Word has length 81 [2021-11-07 01:44:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:36,942 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 305 transitions. [2021-11-07 01:44:36,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 01:44:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 305 transitions. [2021-11-07 01:44:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:44:36,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:36,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:36,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-07 01:44:36,943 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1064681092, now seen corresponding path program 1 times [2021-11-07 01:44:36,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:36,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843874472] [2021-11-07 01:44:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:36,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:37,250 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 01:44:37,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:37,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843874472] [2021-11-07 01:44:37,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843874472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:37,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:37,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:44:37,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75818377] [2021-11-07 01:44:37,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:37,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:37,253 INFO L87 Difference]: Start difference. First operand 260 states and 305 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 01:44:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:38,382 INFO L93 Difference]: Finished difference Result 626 states and 757 transitions. [2021-11-07 01:44:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:44:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 81 [2021-11-07 01:44:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:38,389 INFO L225 Difference]: With dead ends: 626 [2021-11-07 01:44:38,389 INFO L226 Difference]: Without dead ends: 522 [2021-11-07 01:44:38,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-07 01:44:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 197. [2021-11-07 01:44:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.1979166666666667) internal successors, (230), 196 states have internal predecessors, (230), 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 01:44:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2021-11-07 01:44:38,459 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 81 [2021-11-07 01:44:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:38,460 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2021-11-07 01:44:38,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 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 01:44:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2021-11-07 01:44:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:44:38,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:38,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:38,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-07 01:44:38,462 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1426673615, now seen corresponding path program 1 times [2021-11-07 01:44:38,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:38,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103419750] [2021-11-07 01:44:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:38,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:38,836 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 01:44:38,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:38,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103419750] [2021-11-07 01:44:38,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103419750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:38,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:38,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:44:38,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318853294] [2021-11-07 01:44:38,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:38,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:38,839 INFO L87 Difference]: Start difference. First operand 197 states and 230 transitions. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 11 states have internal predecessors, (82), 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 01:44:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:39,627 INFO L93 Difference]: Finished difference Result 478 states and 583 transitions. [2021-11-07 01:44:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:39,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:44:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:39,630 INFO L225 Difference]: With dead ends: 478 [2021-11-07 01:44:39,630 INFO L226 Difference]: Without dead ends: 400 [2021-11-07 01:44:39,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-07 01:44:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 149. [2021-11-07 01:44:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.1712328767123288) internal successors, (171), 148 states have internal predecessors, (171), 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 01:44:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2021-11-07 01:44:39,679 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 82 [2021-11-07 01:44:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:39,679 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2021-11-07 01:44:39,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 11 states have internal predecessors, (82), 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 01:44:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2021-11-07 01:44:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:44:39,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:39,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-07 01:44:39,681 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -678951119, now seen corresponding path program 1 times [2021-11-07 01:44:39,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:39,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276742905] [2021-11-07 01:44:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:39,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:39,787 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 01:44:39,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:39,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276742905] [2021-11-07 01:44:39,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276742905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:39,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:39,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:39,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811425503] [2021-11-07 01:44:39,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:39,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:39,790 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 01:44:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:40,281 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2021-11-07 01:44:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:44:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:44:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:40,282 INFO L225 Difference]: With dead ends: 218 [2021-11-07 01:44:40,282 INFO L226 Difference]: Without dead ends: 211 [2021-11-07 01:44:40,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:44:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-07 01:44:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2021-11-07 01:44:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 148 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2021-11-07 01:44:40,330 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 82 [2021-11-07 01:44:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:40,330 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2021-11-07 01:44:40,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 01:44:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2021-11-07 01:44:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:44:40,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:40,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:40,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-07 01:44:40,331 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -748534451, now seen corresponding path program 1 times [2021-11-07 01:44:40,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:40,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199569765] [2021-11-07 01:44:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:40,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:40,430 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 01:44:40,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:40,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199569765] [2021-11-07 01:44:40,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199569765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:40,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:40,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:40,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063725429] [2021-11-07 01:44:40,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:40,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:40,433 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 01:44:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:40,902 INFO L93 Difference]: Finished difference Result 288 states and 342 transitions. [2021-11-07 01:44:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:44:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:44:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:40,904 INFO L225 Difference]: With dead ends: 288 [2021-11-07 01:44:40,904 INFO L226 Difference]: Without dead ends: 229 [2021-11-07 01:44:40,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-07 01:44:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 149. [2021-11-07 01:44:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.1575342465753424) internal successors, (169), 148 states have internal predecessors, (169), 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 01:44:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-11-07 01:44:40,950 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 82 [2021-11-07 01:44:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:40,951 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-11-07 01:44:40,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 01:44:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-11-07 01:44:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:44:40,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:40,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:40,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-07 01:44:40,952 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash -633529937, now seen corresponding path program 1 times [2021-11-07 01:44:40,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:40,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957165652] [2021-11-07 01:44:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:40,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:41,299 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 01:44:41,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:41,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957165652] [2021-11-07 01:44:41,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957165652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:41,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:41,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:44:41,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421452287] [2021-11-07 01:44:41,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:41,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:41,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:41,302 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 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 01:44:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:42,209 INFO L93 Difference]: Finished difference Result 299 states and 361 transitions. [2021-11-07 01:44:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 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 84 [2021-11-07 01:44:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:42,211 INFO L225 Difference]: With dead ends: 299 [2021-11-07 01:44:42,211 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 01:44:42,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 01:44:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 143. [2021-11-07 01:44:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 142 states have internal predecessors, (163), 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 01:44:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2021-11-07 01:44:42,262 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 84 [2021-11-07 01:44:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:42,262 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2021-11-07 01:44:42,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 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 01:44:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2021-11-07 01:44:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:44:42,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:42,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:42,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-07 01:44:42,263 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1779063521, now seen corresponding path program 1 times [2021-11-07 01:44:42,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:42,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47149340] [2021-11-07 01:44:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:42,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:43,304 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 01:44:43,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:43,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47149340] [2021-11-07 01:44:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47149340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:43,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:43,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-07 01:44:43,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952588783] [2021-11-07 01:44:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:44:43,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:44:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:44:43,306 INFO L87 Difference]: Start difference. First operand 143 states and 163 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 01:44:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:46,821 INFO L93 Difference]: Finished difference Result 528 states and 631 transitions. [2021-11-07 01:44:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:44:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 84 [2021-11-07 01:44:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:46,824 INFO L225 Difference]: With dead ends: 528 [2021-11-07 01:44:46,824 INFO L226 Difference]: Without dead ends: 520 [2021-11-07 01:44:46,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 01:44:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-07 01:44:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 162. [2021-11-07 01:44:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.1625) internal successors, (186), 161 states have internal predecessors, (186), 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 01:44:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2021-11-07 01:44:46,887 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 84 [2021-11-07 01:44:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:46,888 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2021-11-07 01:44:46,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 01:44:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2021-11-07 01:44:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:44:46,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:46,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:46,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-07 01:44:46,889 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1519523663, now seen corresponding path program 1 times [2021-11-07 01:44:46,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:46,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965977837] [2021-11-07 01:44:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:46,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:47,489 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 01:44:47,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:47,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965977837] [2021-11-07 01:44:47,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965977837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:47,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:47,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:44:47,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635836807] [2021-11-07 01:44:47,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:44:47,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:44:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:44:47,492 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 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 01:44:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:49,050 INFO L93 Difference]: Finished difference Result 296 states and 351 transitions. [2021-11-07 01:44:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:44:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 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 85 [2021-11-07 01:44:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:49,052 INFO L225 Difference]: With dead ends: 296 [2021-11-07 01:44:49,052 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 01:44:49,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:44:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 01:44:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 143. [2021-11-07 01:44:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.148936170212766) internal successors, (162), 142 states have internal predecessors, (162), 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 01:44:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2021-11-07 01:44:49,105 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 85 [2021-11-07 01:44:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:49,105 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2021-11-07 01:44:49,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 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 01:44:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2021-11-07 01:44:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:44:49,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:49,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:49,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-07 01:44:49,106 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash 308013551, now seen corresponding path program 1 times [2021-11-07 01:44:49,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:49,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767977157] [2021-11-07 01:44:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:49,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:49,451 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 01:44:49,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:49,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767977157] [2021-11-07 01:44:49,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767977157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:49,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:49,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:44:49,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997043598] [2021-11-07 01:44:49,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:44:49,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:44:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:44:49,453 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 01:44:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:50,412 INFO L93 Difference]: Finished difference Result 311 states and 377 transitions. [2021-11-07 01:44:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:44:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 85 [2021-11-07 01:44:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:50,414 INFO L225 Difference]: With dead ends: 311 [2021-11-07 01:44:50,415 INFO L226 Difference]: Without dead ends: 299 [2021-11-07 01:44:50,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:44:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-07 01:44:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 131. [2021-11-07 01:44:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 130 states have internal predecessors, (150), 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 01:44:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-11-07 01:44:50,486 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 85 [2021-11-07 01:44:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:50,487 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-11-07 01:44:50,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 11 states have internal predecessors, (85), 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 01:44:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-11-07 01:44:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:44:50,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:50,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:50,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-07 01:44:50,488 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:50,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:50,488 INFO L85 PathProgramCache]: Analyzing trace with hash 504530553, now seen corresponding path program 1 times [2021-11-07 01:44:50,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:50,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341291686] [2021-11-07 01:44:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:50,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:50,540 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 01:44:50,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:50,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341291686] [2021-11-07 01:44:50,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341291686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:50,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:50,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:50,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82338105] [2021-11-07 01:44:50,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:50,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:50,542 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 01:44:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:50,698 INFO L93 Difference]: Finished difference Result 213 states and 258 transitions. [2021-11-07 01:44:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 100 [2021-11-07 01:44:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:50,700 INFO L225 Difference]: With dead ends: 213 [2021-11-07 01:44:50,700 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 01:44:50,700 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 01:44:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 01:44:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2021-11-07 01:44:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1939393939393939) internal successors, (197), 165 states have internal predecessors, (197), 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 01:44:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 197 transitions. [2021-11-07 01:44:50,851 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 197 transitions. Word has length 100 [2021-11-07 01:44:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:50,852 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 197 transitions. [2021-11-07 01:44:50,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 01:44:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 197 transitions. [2021-11-07 01:44:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:44:50,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:50,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:50,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-07 01:44:50,854 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash 246569264, now seen corresponding path program 1 times [2021-11-07 01:44:50,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:50,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786261124] [2021-11-07 01:44:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:50,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:50,917 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 01:44:50,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:50,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786261124] [2021-11-07 01:44:50,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786261124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:50,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:50,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:50,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980452910] [2021-11-07 01:44:50,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:50,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:50,921 INFO L87 Difference]: Start difference. First operand 166 states and 197 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 01:44:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:51,177 INFO L93 Difference]: Finished difference Result 318 states and 399 transitions. [2021-11-07 01:44:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 103 [2021-11-07 01:44:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:51,179 INFO L225 Difference]: With dead ends: 318 [2021-11-07 01:44:51,179 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 01:44:51,179 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 01:44:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 01:44:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2021-11-07 01:44:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 231 states have internal predecessors, (285), 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 01:44:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 285 transitions. [2021-11-07 01:44:51,347 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 285 transitions. Word has length 103 [2021-11-07 01:44:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:51,347 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 285 transitions. [2021-11-07 01:44:51,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 01:44:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 285 transitions. [2021-11-07 01:44:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:44:51,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:51,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:51,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-07 01:44:51,348 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1436792568, now seen corresponding path program 1 times [2021-11-07 01:44:51,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:51,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979133278] [2021-11-07 01:44:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:51,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:51,403 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 01:44:51,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:51,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979133278] [2021-11-07 01:44:51,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979133278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:51,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:51,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:51,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199418032] [2021-11-07 01:44:51,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:51,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:51,406 INFO L87 Difference]: Start difference. First operand 232 states and 285 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 01:44:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:51,898 INFO L93 Difference]: Finished difference Result 516 states and 663 transitions. [2021-11-07 01:44:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-07 01:44:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:51,901 INFO L225 Difference]: With dead ends: 516 [2021-11-07 01:44:51,901 INFO L226 Difference]: Without dead ends: 374 [2021-11-07 01:44:51,902 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 01:44:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-07 01:44:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 356. [2021-11-07 01:44:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.2647887323943663) internal successors, (449), 355 states have internal predecessors, (449), 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 01:44:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 449 transitions. [2021-11-07 01:44:52,244 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 449 transitions. Word has length 106 [2021-11-07 01:44:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:52,245 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 449 transitions. [2021-11-07 01:44:52,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 01:44:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 449 transitions. [2021-11-07 01:44:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 01:44:52,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:52,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:52,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-07 01:44:52,246 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1644701149, now seen corresponding path program 1 times [2021-11-07 01:44:52,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:52,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901666247] [2021-11-07 01:44:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:52,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:52,298 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 01:44:52,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:52,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901666247] [2021-11-07 01:44:52,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901666247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:52,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:52,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:52,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057755272] [2021-11-07 01:44:52,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:52,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:52,301 INFO L87 Difference]: Start difference. First operand 356 states and 449 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 01:44:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:52,908 INFO L93 Difference]: Finished difference Result 888 states and 1155 transitions. [2021-11-07 01:44:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-11-07 01:44:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:52,911 INFO L225 Difference]: With dead ends: 888 [2021-11-07 01:44:52,911 INFO L226 Difference]: Without dead ends: 622 [2021-11-07 01:44:52,912 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 01:44:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-07 01:44:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 588. [2021-11-07 01:44:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 1.282793867120954) internal successors, (753), 587 states have internal predecessors, (753), 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 01:44:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 753 transitions. [2021-11-07 01:44:53,473 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 753 transitions. Word has length 109 [2021-11-07 01:44:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:53,474 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 753 transitions. [2021-11-07 01:44:53,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 01:44:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 753 transitions. [2021-11-07 01:44:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:44:53,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:53,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:53,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-07 01:44:53,475 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash -136598159, now seen corresponding path program 1 times [2021-11-07 01:44:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:53,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553544795] [2021-11-07 01:44:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:53,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:53,527 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 01:44:53,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:53,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553544795] [2021-11-07 01:44:53,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553544795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:53,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:53,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:44:53,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417076051] [2021-11-07 01:44:53,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:53,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:53,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:53,530 INFO L87 Difference]: Start difference. First operand 588 states and 753 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 01:44:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:54,996 INFO L93 Difference]: Finished difference Result 1584 states and 2067 transitions. [2021-11-07 01:44:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2021-11-07 01:44:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:54,999 INFO L225 Difference]: With dead ends: 1584 [2021-11-07 01:44:54,999 INFO L226 Difference]: Without dead ends: 1086 [2021-11-07 01:44:54,999 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 01:44:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-07 01:44:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1020. [2021-11-07 01:44:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 1.2885181550539744) internal successors, (1313), 1019 states have internal predecessors, (1313), 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 01:44:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1313 transitions. [2021-11-07 01:44:56,156 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1313 transitions. Word has length 112 [2021-11-07 01:44:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:56,156 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1313 transitions. [2021-11-07 01:44:56,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 01:44:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1313 transitions. [2021-11-07 01:44:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 01:44:56,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:56,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:56,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-07 01:44:56,158 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:44:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1706501695, now seen corresponding path program 1 times [2021-11-07 01:44:56,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:56,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465740984] [2021-11-07 01:44:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:56,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:56,244 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 01:44:56,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:56,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465740984] [2021-11-07 01:44:56,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465740984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:56,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:56,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:44:56,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867047019] [2021-11-07 01:44:56,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:56,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:56,247 INFO L87 Difference]: Start difference. First operand 1020 states and 1313 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 01:45:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:00,050 INFO L93 Difference]: Finished difference Result 4003 states and 5194 transitions. [2021-11-07 01:45:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:45:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 115 [2021-11-07 01:45:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:00,059 INFO L225 Difference]: With dead ends: 4003 [2021-11-07 01:45:00,059 INFO L226 Difference]: Without dead ends: 3073 [2021-11-07 01:45:00,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:45:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-11-07 01:45:01,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1401. [2021-11-07 01:45:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 1.2785714285714285) internal successors, (1790), 1400 states have internal predecessors, (1790), 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 01:45:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1790 transitions. [2021-11-07 01:45:01,740 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1790 transitions. Word has length 115 [2021-11-07 01:45:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:01,740 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 1790 transitions. [2021-11-07 01:45:01,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 01:45:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1790 transitions. [2021-11-07 01:45:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:45:01,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:01,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:01,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-07 01:45:01,741 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash 295650275, now seen corresponding path program 1 times [2021-11-07 01:45:01,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:01,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255619633] [2021-11-07 01:45:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:01,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:01,918 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 01:45:01,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:01,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255619633] [2021-11-07 01:45:01,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255619633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:01,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:01,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:45:01,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800997983] [2021-11-07 01:45:01,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:01,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:45:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:45:01,920 INFO L87 Difference]: Start difference. First operand 1401 states and 1790 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 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 01:45:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:03,732 INFO L93 Difference]: Finished difference Result 2714 states and 3485 transitions. [2021-11-07 01:45:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 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 117 [2021-11-07 01:45:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:03,736 INFO L225 Difference]: With dead ends: 2714 [2021-11-07 01:45:03,736 INFO L226 Difference]: Without dead ends: 1403 [2021-11-07 01:45:03,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:45:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-11-07 01:45:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2021-11-07 01:45:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 1.2778571428571428) internal successors, (1789), 1400 states have internal predecessors, (1789), 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 01:45:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1789 transitions. [2021-11-07 01:45:05,311 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1789 transitions. Word has length 117 [2021-11-07 01:45:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:05,312 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 1789 transitions. [2021-11-07 01:45:05,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 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 01:45:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1789 transitions. [2021-11-07 01:45:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:45:05,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:05,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:05,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-07 01:45:05,313 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1755736976, now seen corresponding path program 1 times [2021-11-07 01:45:05,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:05,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234679060] [2021-11-07 01:45:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:05,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:05,364 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 01:45:05,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:05,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234679060] [2021-11-07 01:45:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234679060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:05,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:05,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:45:05,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828737727] [2021-11-07 01:45:05,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:05,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:45:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:05,367 INFO L87 Difference]: Start difference. First operand 1401 states and 1789 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 01:45:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:07,633 INFO L93 Difference]: Finished difference Result 3258 states and 4187 transitions. [2021-11-07 01:45:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 117 [2021-11-07 01:45:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:07,638 INFO L225 Difference]: With dead ends: 3258 [2021-11-07 01:45:07,638 INFO L226 Difference]: Without dead ends: 1947 [2021-11-07 01:45:07,640 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 01:45:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-11-07 01:45:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1945. [2021-11-07 01:45:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 1.2736625514403292) internal successors, (2476), 1944 states have internal predecessors, (2476), 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 01:45:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2476 transitions. [2021-11-07 01:45:09,771 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2476 transitions. Word has length 117 [2021-11-07 01:45:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:09,771 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2476 transitions. [2021-11-07 01:45:09,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 01:45:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2476 transitions. [2021-11-07 01:45:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:45:09,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:09,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:09,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-07 01:45:09,773 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1579083826, now seen corresponding path program 1 times [2021-11-07 01:45:09,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:09,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033946515] [2021-11-07 01:45:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:09,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:09,871 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 01:45:09,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:09,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033946515] [2021-11-07 01:45:09,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033946515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:09,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:09,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:45:09,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544293466] [2021-11-07 01:45:09,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:45:09,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:45:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:45:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:45:09,874 INFO L87 Difference]: Start difference. First operand 1945 states and 2476 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 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 01:45:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:13,576 INFO L93 Difference]: Finished difference Result 2739 states and 3449 transitions. [2021-11-07 01:45:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:45:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 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 118 [2021-11-07 01:45:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:13,580 INFO L225 Difference]: With dead ends: 2739 [2021-11-07 01:45:13,580 INFO L226 Difference]: Without dead ends: 2737 [2021-11-07 01:45:13,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-11-07 01:45:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1945. [2021-11-07 01:45:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 1.257201646090535) internal successors, (2444), 1944 states have internal predecessors, (2444), 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 01:45:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2444 transitions. [2021-11-07 01:45:15,722 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2444 transitions. Word has length 118 [2021-11-07 01:45:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:15,722 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2444 transitions. [2021-11-07 01:45:15,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 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 01:45:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2444 transitions. [2021-11-07 01:45:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:45:15,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:15,724 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:15,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-07 01:45:15,724 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1821211791, now seen corresponding path program 1 times [2021-11-07 01:45:15,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:15,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763586089] [2021-11-07 01:45:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:15,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:45:15,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:15,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763586089] [2021-11-07 01:45:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763586089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:15,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:15,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:45:15,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687104950] [2021-11-07 01:45:15,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:45:15,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:45:15,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:45:15,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:45:15,975 INFO L87 Difference]: Start difference. First operand 1945 states and 2444 transitions. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 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 01:45:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:24,536 INFO L93 Difference]: Finished difference Result 8212 states and 10337 transitions. [2021-11-07 01:45:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:45:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 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 134 [2021-11-07 01:45:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:24,550 INFO L225 Difference]: With dead ends: 8212 [2021-11-07 01:45:24,550 INFO L226 Difference]: Without dead ends: 6351 [2021-11-07 01:45:24,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:45:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-11-07 01:45:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 1949. [2021-11-07 01:45:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 1.2566735112936345) internal successors, (2448), 1948 states have internal predecessors, (2448), 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 01:45:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2448 transitions. [2021-11-07 01:45:27,055 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2448 transitions. Word has length 134 [2021-11-07 01:45:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:27,056 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2448 transitions. [2021-11-07 01:45:27,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 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 01:45:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2448 transitions. [2021-11-07 01:45:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 01:45:27,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:27,057 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:27,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-07 01:45:27,058 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1152072427, now seen corresponding path program 1 times [2021-11-07 01:45:27,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:27,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332448318] [2021-11-07 01:45:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:27,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:45:27,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:27,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332448318] [2021-11-07 01:45:27,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332448318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:27,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:27,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:45:27,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308419662] [2021-11-07 01:45:27,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:45:27,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:45:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:45:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:27,203 INFO L87 Difference]: Start difference. First operand 1949 states and 2448 transitions. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 7 states have internal predecessors, (126), 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 01:45:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:31,095 INFO L93 Difference]: Finished difference Result 4878 states and 6147 transitions. [2021-11-07 01:45:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:45:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 7 states have internal predecessors, (126), 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 135 [2021-11-07 01:45:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:31,101 INFO L225 Difference]: With dead ends: 4878 [2021-11-07 01:45:31,101 INFO L226 Difference]: Without dead ends: 3017 [2021-11-07 01:45:31,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:45:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-11-07 01:45:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 1945. [2021-11-07 01:45:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 1.256687242798354) internal successors, (2443), 1944 states have internal predecessors, (2443), 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 01:45:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2443 transitions. [2021-11-07 01:45:33,460 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2443 transitions. Word has length 135 [2021-11-07 01:45:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:33,460 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2443 transitions. [2021-11-07 01:45:33,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 7 states have internal predecessors, (126), 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 01:45:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2443 transitions. [2021-11-07 01:45:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 01:45:33,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:33,462 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-07 01:45:33,463 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:33,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:33,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1030141155, now seen corresponding path program 1 times [2021-11-07 01:45:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:33,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154859745] [2021-11-07 01:45:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:33,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:45:34,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:34,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154859745] [2021-11-07 01:45:34,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154859745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:34,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:34,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-07 01:45:34,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245252535] [2021-11-07 01:45:34,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:45:34,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:45:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:45:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:45:34,327 INFO L87 Difference]: Start difference. First operand 1945 states and 2443 transitions. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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 01:45:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:44,192 INFO L93 Difference]: Finished difference Result 7509 states and 9470 transitions. [2021-11-07 01:45:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:45:44,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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 136 [2021-11-07 01:45:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:44,209 INFO L225 Difference]: With dead ends: 7509 [2021-11-07 01:45:44,210 INFO L226 Difference]: Without dead ends: 5647 [2021-11-07 01:45:44,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=1819, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 01:45:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5647 states. [2021-11-07 01:45:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5647 to 1965. [2021-11-07 01:45:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.255600814663951) internal successors, (2466), 1964 states have internal predecessors, (2466), 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 01:45:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2466 transitions. [2021-11-07 01:45:46,895 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2466 transitions. Word has length 136 [2021-11-07 01:45:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:46,895 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 2466 transitions. [2021-11-07 01:45:46,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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 01:45:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2466 transitions. [2021-11-07 01:45:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:45:46,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:46,897 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:46,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-07 01:45:46,897 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 13 more)] === [2021-11-07 01:45:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash 904958189, now seen corresponding path program 1 times [2021-11-07 01:45:46,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:45:46,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519772934] [2021-11-07 01:45:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:46,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:45:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:54,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:54,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519772934] [2021-11-07 01:45:54,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519772934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:45:54,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818072768] [2021-11-07 01:45:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:54,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:54,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:54,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:54,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_105caa4f-bed5-4bcb-a46e-3865ca30cea3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:45:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-07 01:45:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:42,782 INFO L328 TraceCheckSpWp]: Computing backward predicates...