./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur --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 be1fcaa299b4a26d5c3c0d4f857b13329cbb7ec0505911e54bd9d27d2647b4d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:22:25,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:22:25,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:22:25,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:22:25,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:22:25,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:22:25,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:22:25,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:22:25,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:22:25,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:22:25,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:22:25,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:22:25,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:22:25,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:22:25,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:22:25,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:22:25,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:22:25,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:22:25,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:22:25,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:22:25,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:22:25,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:22:25,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:22:25,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:22:25,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:22:25,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:22:25,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:22:25,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:22:25,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:22:25,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:22:25,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:22:25,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:22:25,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:22:25,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:22:25,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:22:25,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:22:25,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:22:25,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:22:25,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:22:25,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:22:25,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:22:25,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:22:25,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:22:25,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:22:25,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:22:25,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:22:26,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:22:26,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:22:26,001 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:22:26,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:22:26,001 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:22:26,002 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:22:26,003 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:22:26,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:22:26,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:22:26,003 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:22:26,003 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:22:26,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:22:26,004 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:22:26,004 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:22:26,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:22:26,005 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:22:26,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:22:26,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:22:26,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:22:26,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:22:26,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:22:26,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:22:26,007 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:22:26,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:22:26,007 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:22:26,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:22:26,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:22:26,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:22:26,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:26,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:22:26,009 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:22:26,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:22:26,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:22:26,009 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:22:26,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:22:26,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:22:26,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:22:26,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1fcaa299b4a26d5c3c0d4f857b13329cbb7ec0505911e54bd9d27d2647b4d4 [2022-11-26 00:22:26,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:22:26,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:22:26,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:22:26,311 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:22:26,311 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:22:26,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2022-11-26 00:22:29,208 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:22:29,646 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:22:29,647 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2022-11-26 00:22:29,676 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/data/4c7f41af8/10db605ec59d4558971695414dd8800e/FLAGa81f1629d [2022-11-26 00:22:29,696 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/data/4c7f41af8/10db605ec59d4558971695414dd8800e [2022-11-26 00:22:29,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:22:29,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:22:29,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:29,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:22:29,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:22:29,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:29" (1/1) ... [2022-11-26 00:22:29,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e592d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:29, skipping insertion in model container [2022-11-26 00:22:29,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:29" (1/1) ... [2022-11-26 00:22:29,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:22:29,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:22:30,216 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2022-11-26 00:22:30,245 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2022-11-26 00:22:30,286 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2022-11-26 00:22:30,318 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2022-11-26 00:22:30,454 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2022-11-26 00:22:30,593 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2022-11-26 00:22:30,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:30,802 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:22:30,867 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2022-11-26 00:22:30,884 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2022-11-26 00:22:30,908 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2022-11-26 00:22:30,924 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2022-11-26 00:22:30,969 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2022-11-26 00:22:31,045 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2022-11-26 00:22:31,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:31,203 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:22:31,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31 WrapperNode [2022-11-26 00:22:31,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:31,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:31,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:22:31,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:22:31,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,389 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5288 [2022-11-26 00:22:31,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:31,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:22:31,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:22:31,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:22:31,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:22:31,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:22:31,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:22:31,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:22:31,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (1/1) ... [2022-11-26 00:22:31,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:31,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:31,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:22:31,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:22:31,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:22:31,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:22:31,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:22:31,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:22:31,926 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:22:31,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:22:34,804 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:22:35,277 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:22:35,278 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:22:35,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:35 BoogieIcfgContainer [2022-11-26 00:22:35,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:22:35,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:22:35,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:22:35,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:22:35,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:22:29" (1/3) ... [2022-11-26 00:22:35,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f9aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:35, skipping insertion in model container [2022-11-26 00:22:35,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:31" (2/3) ... [2022-11-26 00:22:35,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f9aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:35, skipping insertion in model container [2022-11-26 00:22:35,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:35" (3/3) ... [2022-11-26 00:22:35,295 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2022-11-26 00:22:35,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:22:35,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-26 00:22:35,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:22:35,411 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ce1ac92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:22:35,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-26 00:22:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 1053 states, 1046 states have (on average 1.8355640535372848) internal successors, (1920), 1052 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:22:35,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:35,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:35,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2020000843, now seen corresponding path program 1 times [2022-11-26 00:22:35,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:35,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73726653] [2022-11-26 00:22:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:36,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73726653] [2022-11-26 00:22:36,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73726653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:36,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:36,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:22:36,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110413758] [2022-11-26 00:22:36,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:22:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:22:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:22:36,193 INFO L87 Difference]: Start difference. First operand has 1053 states, 1046 states have (on average 1.8355640535372848) internal successors, (1920), 1052 states have internal predecessors, (1920), 0 states have call successors, (0), 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 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:37,706 INFO L93 Difference]: Finished difference Result 1879 states and 3332 transitions. [2022-11-26 00:22:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:22:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-26 00:22:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:37,726 INFO L225 Difference]: With dead ends: 1879 [2022-11-26 00:22:37,730 INFO L226 Difference]: Without dead ends: 1220 [2022-11-26 00:22:37,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:22:37,743 INFO L413 NwaCegarLoop]: 965 mSDtfsCounter, 5914 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5914 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:37,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5914 Valid, 1246 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:22:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-26 00:22:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1208. [2022-11-26 00:22:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1202 states have (on average 1.2961730449251248) internal successors, (1558), 1207 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1558 transitions. [2022-11-26 00:22:37,900 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1558 transitions. Word has length 50 [2022-11-26 00:22:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:37,901 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1558 transitions. [2022-11-26 00:22:37,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1558 transitions. [2022-11-26 00:22:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:22:37,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:37,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:37,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:22:37,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash -371948326, now seen corresponding path program 1 times [2022-11-26 00:22:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:37,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192050790] [2022-11-26 00:22:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:37,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:38,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:38,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192050790] [2022-11-26 00:22:38,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192050790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:38,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:38,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:22:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769858379] [2022-11-26 00:22:38,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:22:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:22:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:22:38,110 INFO L87 Difference]: Start difference. First operand 1208 states and 1558 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:39,129 INFO L93 Difference]: Finished difference Result 2197 states and 2879 transitions. [2022-11-26 00:22:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:22:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-26 00:22:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:39,135 INFO L225 Difference]: With dead ends: 2197 [2022-11-26 00:22:39,135 INFO L226 Difference]: Without dead ends: 1474 [2022-11-26 00:22:39,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:22:39,137 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 3694 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3694 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:39,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3694 Valid, 675 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:22:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-11-26 00:22:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1464. [2022-11-26 00:22:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1458 states have (on average 1.3072702331961592) internal successors, (1906), 1463 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1906 transitions. [2022-11-26 00:22:39,222 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1906 transitions. Word has length 50 [2022-11-26 00:22:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:39,223 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 1906 transitions. [2022-11-26 00:22:39,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1906 transitions. [2022-11-26 00:22:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:22:39,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:39,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:39,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:22:39,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1656171021, now seen corresponding path program 1 times [2022-11-26 00:22:39,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:39,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610422384] [2022-11-26 00:22:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:39,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:39,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610422384] [2022-11-26 00:22:39,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610422384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:39,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:39,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:22:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991582026] [2022-11-26 00:22:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:22:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:22:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:22:39,377 INFO L87 Difference]: Start difference. First operand 1464 states and 1906 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:40,456 INFO L93 Difference]: Finished difference Result 2827 states and 3713 transitions. [2022-11-26 00:22:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:22:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-26 00:22:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:40,464 INFO L225 Difference]: With dead ends: 2827 [2022-11-26 00:22:40,464 INFO L226 Difference]: Without dead ends: 2099 [2022-11-26 00:22:40,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:22:40,467 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 3332 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3332 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:40,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3332 Valid, 646 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:22:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-11-26 00:22:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2093. [2022-11-26 00:22:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2980354575946333) internal successors, (2709), 2092 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2709 transitions. [2022-11-26 00:22:40,662 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2709 transitions. Word has length 50 [2022-11-26 00:22:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:40,663 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2709 transitions. [2022-11-26 00:22:40,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2709 transitions. [2022-11-26 00:22:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 00:22:40,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:40,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:40,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:22:40,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1156025879, now seen corresponding path program 1 times [2022-11-26 00:22:40,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:40,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814887284] [2022-11-26 00:22:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:40,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:41,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:41,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814887284] [2022-11-26 00:22:41,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814887284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:41,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:41,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:22:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11724335] [2022-11-26 00:22:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:41,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:22:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:22:41,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:22:41,071 INFO L87 Difference]: Start difference. First operand 2093 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:43,395 INFO L93 Difference]: Finished difference Result 3391 states and 4452 transitions. [2022-11-26 00:22:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:22:43,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-26 00:22:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:43,407 INFO L225 Difference]: With dead ends: 3391 [2022-11-26 00:22:43,407 INFO L226 Difference]: Without dead ends: 3386 [2022-11-26 00:22:43,408 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:22:43,409 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 1996 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:43,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1996 Valid, 2457 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:22:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-11-26 00:22:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2093. [2022-11-26 00:22:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2975563009103976) internal successors, (2708), 2092 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2708 transitions. [2022-11-26 00:22:43,621 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2708 transitions. Word has length 51 [2022-11-26 00:22:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:43,622 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2708 transitions. [2022-11-26 00:22:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2708 transitions. [2022-11-26 00:22:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 00:22:43,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:43,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:22:43,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash 544097692, now seen corresponding path program 1 times [2022-11-26 00:22:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559523883] [2022-11-26 00:22:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:44,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:44,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559523883] [2022-11-26 00:22:44,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559523883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:44,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:44,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:22:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708620049] [2022-11-26 00:22:44,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:44,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:22:44,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:44,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:22:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:22:44,040 INFO L87 Difference]: Start difference. First operand 2093 states and 2708 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:46,577 INFO L93 Difference]: Finished difference Result 3833 states and 5088 transitions. [2022-11-26 00:22:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:22:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-26 00:22:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:46,590 INFO L225 Difference]: With dead ends: 3833 [2022-11-26 00:22:46,590 INFO L226 Difference]: Without dead ends: 3510 [2022-11-26 00:22:46,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:22:46,592 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 2859 mSDsluCounter, 2183 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2859 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:46,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2859 Valid, 2737 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:22:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-11-26 00:22:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2093. [2022-11-26 00:22:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.297077144226162) internal successors, (2707), 2092 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2707 transitions. [2022-11-26 00:22:46,770 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2707 transitions. Word has length 51 [2022-11-26 00:22:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:46,770 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2707 transitions. [2022-11-26 00:22:46,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2707 transitions. [2022-11-26 00:22:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 00:22:46,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:46,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:46,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:22:46,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:46,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1134807775, now seen corresponding path program 1 times [2022-11-26 00:22:46,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:46,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289161252] [2022-11-26 00:22:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:46,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:47,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289161252] [2022-11-26 00:22:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289161252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:47,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:47,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:22:47,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890182940] [2022-11-26 00:22:47,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:22:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:22:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:22:47,048 INFO L87 Difference]: Start difference. First operand 2093 states and 2707 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:48,791 INFO L93 Difference]: Finished difference Result 3455 states and 4567 transitions. [2022-11-26 00:22:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:22:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-26 00:22:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:48,802 INFO L225 Difference]: With dead ends: 3455 [2022-11-26 00:22:48,802 INFO L226 Difference]: Without dead ends: 3008 [2022-11-26 00:22:48,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:22:48,807 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 3486 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3486 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:48,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3486 Valid, 1426 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:22:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-11-26 00:22:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2093. [2022-11-26 00:22:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2965979875419262) internal successors, (2706), 2092 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2706 transitions. [2022-11-26 00:22:49,028 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2706 transitions. Word has length 51 [2022-11-26 00:22:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:49,029 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2706 transitions. [2022-11-26 00:22:49,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2706 transitions. [2022-11-26 00:22:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:22:49,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:49,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:22:49,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1876349593, now seen corresponding path program 1 times [2022-11-26 00:22:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:49,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153156869] [2022-11-26 00:22:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:49,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:49,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153156869] [2022-11-26 00:22:49,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153156869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:49,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:49,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:49,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898992243] [2022-11-26 00:22:49,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:49,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:49,098 INFO L87 Difference]: Start difference. First operand 2093 states and 2706 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:49,517 INFO L93 Difference]: Finished difference Result 2855 states and 3765 transitions. [2022-11-26 00:22:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:49,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-26 00:22:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:49,524 INFO L225 Difference]: With dead ends: 2855 [2022-11-26 00:22:49,525 INFO L226 Difference]: Without dead ends: 1802 [2022-11-26 00:22:49,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:49,528 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 522 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:49,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1122 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-11-26 00:22:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2022-11-26 00:22:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1794 states have (on average 1.2709030100334449) internal successors, (2280), 1799 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2280 transitions. [2022-11-26 00:22:49,857 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2280 transitions. Word has length 52 [2022-11-26 00:22:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:49,858 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 2280 transitions. [2022-11-26 00:22:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2280 transitions. [2022-11-26 00:22:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:22:49,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:49,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:49,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:22:49,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash -128279793, now seen corresponding path program 1 times [2022-11-26 00:22:49,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369453190] [2022-11-26 00:22:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:49,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:49,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:49,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369453190] [2022-11-26 00:22:49,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369453190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:49,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:49,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382071945] [2022-11-26 00:22:49,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:49,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:49,952 INFO L87 Difference]: Start difference. First operand 1800 states and 2280 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:50,391 INFO L93 Difference]: Finished difference Result 2757 states and 3658 transitions. [2022-11-26 00:22:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:50,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-26 00:22:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:50,399 INFO L225 Difference]: With dead ends: 2757 [2022-11-26 00:22:50,399 INFO L226 Difference]: Without dead ends: 2057 [2022-11-26 00:22:50,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:50,402 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 377 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:50,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1207 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-11-26 00:22:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2055. [2022-11-26 00:22:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2049 states have (on average 1.3025866276232307) internal successors, (2669), 2054 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2669 transitions. [2022-11-26 00:22:50,772 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2669 transitions. Word has length 52 [2022-11-26 00:22:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:50,772 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 2669 transitions. [2022-11-26 00:22:50,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2669 transitions. [2022-11-26 00:22:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:22:50,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:50,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:22:50,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash -678266137, now seen corresponding path program 1 times [2022-11-26 00:22:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608164352] [2022-11-26 00:22:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:50,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:50,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608164352] [2022-11-26 00:22:50,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608164352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:50,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:50,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:50,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532992717] [2022-11-26 00:22:50,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:50,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:50,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:50,832 INFO L87 Difference]: Start difference. First operand 2055 states and 2669 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:51,475 INFO L93 Difference]: Finished difference Result 3729 states and 5048 transitions. [2022-11-26 00:22:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:51,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-26 00:22:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:51,485 INFO L225 Difference]: With dead ends: 3729 [2022-11-26 00:22:51,485 INFO L226 Difference]: Without dead ends: 2601 [2022-11-26 00:22:51,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:51,490 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 349 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:51,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1228 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2022-11-26 00:22:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2599. [2022-11-26 00:22:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2593 states have (on average 1.321635171615889) internal successors, (3427), 2598 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3427 transitions. [2022-11-26 00:22:52,057 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3427 transitions. Word has length 52 [2022-11-26 00:22:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:52,058 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3427 transitions. [2022-11-26 00:22:52,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3427 transitions. [2022-11-26 00:22:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:22:52,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:52,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:52,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:22:52,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:52,062 INFO L85 PathProgramCache]: Analyzing trace with hash 396589116, now seen corresponding path program 1 times [2022-11-26 00:22:52,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:52,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047949541] [2022-11-26 00:22:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:52,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:52,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:52,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047949541] [2022-11-26 00:22:52,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047949541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:52,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:52,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142788179] [2022-11-26 00:22:52,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:52,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:52,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:52,124 INFO L87 Difference]: Start difference. First operand 2599 states and 3427 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:52,765 INFO L93 Difference]: Finished difference Result 4611 states and 6191 transitions. [2022-11-26 00:22:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-26 00:22:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:52,774 INFO L225 Difference]: With dead ends: 4611 [2022-11-26 00:22:52,774 INFO L226 Difference]: Without dead ends: 2525 [2022-11-26 00:22:52,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:52,778 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 557 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:52,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 801 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2022-11-26 00:22:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2213. [2022-11-26 00:22:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2208 states have (on average 1.3269927536231885) internal successors, (2930), 2212 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2930 transitions. [2022-11-26 00:22:53,134 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2930 transitions. Word has length 53 [2022-11-26 00:22:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:53,134 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 2930 transitions. [2022-11-26 00:22:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2930 transitions. [2022-11-26 00:22:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:22:53,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:53,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:53,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:22:53,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1097574629, now seen corresponding path program 1 times [2022-11-26 00:22:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:53,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832797132] [2022-11-26 00:22:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:53,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:53,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832797132] [2022-11-26 00:22:53,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832797132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:53,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:53,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:22:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942630950] [2022-11-26 00:22:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:22:53,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:22:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:53,194 INFO L87 Difference]: Start difference. First operand 2213 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:53,763 INFO L93 Difference]: Finished difference Result 4102 states and 5512 transitions. [2022-11-26 00:22:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:22:53,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-26 00:22:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:53,771 INFO L225 Difference]: With dead ends: 4102 [2022-11-26 00:22:53,771 INFO L226 Difference]: Without dead ends: 2233 [2022-11-26 00:22:53,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:22:53,775 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 445 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:53,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 595 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:22:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-11-26 00:22:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1971. [2022-11-26 00:22:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1967 states have (on average 1.335027961362481) internal successors, (2626), 1970 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2626 transitions. [2022-11-26 00:22:54,168 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2626 transitions. Word has length 53 [2022-11-26 00:22:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:54,168 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 2626 transitions. [2022-11-26 00:22:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2626 transitions. [2022-11-26 00:22:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:22:54,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:54,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:54,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:22:54,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1858325642, now seen corresponding path program 1 times [2022-11-26 00:22:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123951487] [2022-11-26 00:22:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:54,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123951487] [2022-11-26 00:22:54,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123951487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:54,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:54,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-26 00:22:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419256515] [2022-11-26 00:22:54,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:22:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:22:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:22:54,828 INFO L87 Difference]: Start difference. First operand 1971 states and 2626 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:57,109 INFO L93 Difference]: Finished difference Result 3713 states and 4935 transitions. [2022-11-26 00:22:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:22:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-11-26 00:22:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:57,119 INFO L225 Difference]: With dead ends: 3713 [2022-11-26 00:22:57,119 INFO L226 Difference]: Without dead ends: 3491 [2022-11-26 00:22:57,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:22:57,122 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2404 mSDsluCounter, 3694 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:57,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2404 Valid, 4412 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:22:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-26 00:22:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 1959. [2022-11-26 00:22:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1956 states have (on average 1.3353783231083844) internal successors, (2612), 1958 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2612 transitions. [2022-11-26 00:22:57,649 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2612 transitions. Word has length 54 [2022-11-26 00:22:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:57,649 INFO L495 AbstractCegarLoop]: Abstraction has 1959 states and 2612 transitions. [2022-11-26 00:22:57,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2612 transitions. [2022-11-26 00:22:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:22:57,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:57,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:22:57,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:22:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1760291884, now seen corresponding path program 1 times [2022-11-26 00:22:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076761966] [2022-11-26 00:22:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:58,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:58,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076761966] [2022-11-26 00:22:58,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076761966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:58,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:58,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-26 00:22:58,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032654594] [2022-11-26 00:22:58,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:58,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:22:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:22:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:22:58,168 INFO L87 Difference]: Start difference. First operand 1959 states and 2612 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:00,888 INFO L93 Difference]: Finished difference Result 4069 states and 5389 transitions. [2022-11-26 00:23:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:23:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-11-26 00:23:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:00,897 INFO L225 Difference]: With dead ends: 4069 [2022-11-26 00:23:00,897 INFO L226 Difference]: Without dead ends: 3831 [2022-11-26 00:23:00,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:23:00,899 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 3246 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3246 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:00,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3246 Valid, 2654 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:23:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2022-11-26 00:23:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 1931. [2022-11-26 00:23:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1929 states have (on average 1.3364437532400206) internal successors, (2578), 1930 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2578 transitions. [2022-11-26 00:23:01,480 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2578 transitions. Word has length 54 [2022-11-26 00:23:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:01,481 INFO L495 AbstractCegarLoop]: Abstraction has 1931 states and 2578 transitions. [2022-11-26 00:23:01,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2578 transitions. [2022-11-26 00:23:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:23:01,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:01,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:23:01,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 915713314, now seen corresponding path program 1 times [2022-11-26 00:23:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7329777] [2022-11-26 00:23:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:02,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7329777] [2022-11-26 00:23:02,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7329777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:02,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-26 00:23:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176071629] [2022-11-26 00:23:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:23:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:23:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:23:02,022 INFO L87 Difference]: Start difference. First operand 1931 states and 2578 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:05,490 INFO L93 Difference]: Finished difference Result 4292 states and 5685 transitions. [2022-11-26 00:23:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:23:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-11-26 00:23:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:05,498 INFO L225 Difference]: With dead ends: 4292 [2022-11-26 00:23:05,498 INFO L226 Difference]: Without dead ends: 4061 [2022-11-26 00:23:05,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:23:05,499 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 2262 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 3867 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:05,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 3867 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:23:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2022-11-26 00:23:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 1910. [2022-11-26 00:23:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 1.3368255631220534) internal successors, (2552), 1909 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2552 transitions. [2022-11-26 00:23:06,117 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2552 transitions. Word has length 54 [2022-11-26 00:23:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:06,117 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2552 transitions. [2022-11-26 00:23:06,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2552 transitions. [2022-11-26 00:23:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:23:06,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:06,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:23:06,121 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 711019173, now seen corresponding path program 1 times [2022-11-26 00:23:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662170137] [2022-11-26 00:23:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:06,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662170137] [2022-11-26 00:23:06,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662170137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:06,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:06,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:23:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178680090] [2022-11-26 00:23:06,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:23:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:23:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:23:06,261 INFO L87 Difference]: Start difference. First operand 1910 states and 2552 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:07,656 INFO L93 Difference]: Finished difference Result 4345 states and 5958 transitions. [2022-11-26 00:23:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:23:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-26 00:23:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:07,663 INFO L225 Difference]: With dead ends: 4345 [2022-11-26 00:23:07,663 INFO L226 Difference]: Without dead ends: 2871 [2022-11-26 00:23:07,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:23:07,666 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 189 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:07,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 645 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:23:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2022-11-26 00:23:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2563. [2022-11-26 00:23:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 1.336455893832943) internal successors, (3424), 2562 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3424 transitions. [2022-11-26 00:23:08,433 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3424 transitions. Word has length 55 [2022-11-26 00:23:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:08,433 INFO L495 AbstractCegarLoop]: Abstraction has 2563 states and 3424 transitions. [2022-11-26 00:23:08,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3424 transitions. [2022-11-26 00:23:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:23:08,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:08,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:08,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:23:08,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash 56664476, now seen corresponding path program 1 times [2022-11-26 00:23:08,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:08,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128451005] [2022-11-26 00:23:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:08,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:08,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128451005] [2022-11-26 00:23:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128451005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:08,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:08,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:23:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670359337] [2022-11-26 00:23:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:23:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:23:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:23:08,535 INFO L87 Difference]: Start difference. First operand 2563 states and 3424 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:09,449 INFO L93 Difference]: Finished difference Result 4381 states and 5925 transitions. [2022-11-26 00:23:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:23:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-11-26 00:23:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:09,452 INFO L225 Difference]: With dead ends: 4381 [2022-11-26 00:23:09,452 INFO L226 Difference]: Without dead ends: 2315 [2022-11-26 00:23:09,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:23:09,456 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 426 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:09,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 657 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:23:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-11-26 00:23:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2311. [2022-11-26 00:23:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 1.325974025974026) internal successors, (3063), 2310 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3063 transitions. [2022-11-26 00:23:10,229 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3063 transitions. Word has length 57 [2022-11-26 00:23:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:10,229 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 3063 transitions. [2022-11-26 00:23:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3063 transitions. [2022-11-26 00:23:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:23:10,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:10,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:23:10,231 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1969903368, now seen corresponding path program 1 times [2022-11-26 00:23:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:10,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300188744] [2022-11-26 00:23:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:10,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:10,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300188744] [2022-11-26 00:23:10,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300188744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:10,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:10,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:23:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164177771] [2022-11-26 00:23:10,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:23:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:23:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:23:10,343 INFO L87 Difference]: Start difference. First operand 2311 states and 3063 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:11,795 INFO L93 Difference]: Finished difference Result 4987 states and 6763 transitions. [2022-11-26 00:23:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:23:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-11-26 00:23:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:11,803 INFO L225 Difference]: With dead ends: 4987 [2022-11-26 00:23:11,803 INFO L226 Difference]: Without dead ends: 3275 [2022-11-26 00:23:11,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:23:11,810 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 207 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:11,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 582 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:23:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-11-26 00:23:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2979. [2022-11-26 00:23:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2978 states have (on average 1.3237071860308933) internal successors, (3942), 2978 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3942 transitions. [2022-11-26 00:23:13,055 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3942 transitions. Word has length 59 [2022-11-26 00:23:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:13,056 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 3942 transitions. [2022-11-26 00:23:13,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3942 transitions. [2022-11-26 00:23:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:23:13,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:13,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:13,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:23:13,057 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:13,058 INFO L85 PathProgramCache]: Analyzing trace with hash -583869939, now seen corresponding path program 1 times [2022-11-26 00:23:13,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:13,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444263761] [2022-11-26 00:23:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:13,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:13,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:13,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444263761] [2022-11-26 00:23:13,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444263761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:13,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:13,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:23:13,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710793769] [2022-11-26 00:23:13,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:13,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:23:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:23:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:23:13,420 INFO L87 Difference]: Start difference. First operand 2979 states and 3942 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:16,688 INFO L93 Difference]: Finished difference Result 6236 states and 8218 transitions. [2022-11-26 00:23:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:23:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-11-26 00:23:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:16,701 INFO L225 Difference]: With dead ends: 6236 [2022-11-26 00:23:16,701 INFO L226 Difference]: Without dead ends: 6234 [2022-11-26 00:23:16,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:23:16,704 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 1655 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:16,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1655 Valid, 2060 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:23:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2022-11-26 00:23:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 3480. [2022-11-26 00:23:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3480 states, 3479 states have (on average 1.3179074446680081) internal successors, (4585), 3479 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 4585 transitions. [2022-11-26 00:23:18,145 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 4585 transitions. Word has length 60 [2022-11-26 00:23:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:18,145 INFO L495 AbstractCegarLoop]: Abstraction has 3480 states and 4585 transitions. [2022-11-26 00:23:18,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 4585 transitions. [2022-11-26 00:23:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:23:18,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:18,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:23:18,147 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1377387279, now seen corresponding path program 1 times [2022-11-26 00:23:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:18,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922436422] [2022-11-26 00:23:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:18,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:18,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922436422] [2022-11-26 00:23:18,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922436422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:18,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:18,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:23:18,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979206871] [2022-11-26 00:23:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:23:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:18,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:23:18,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:23:18,469 INFO L87 Difference]: Start difference. First operand 3480 states and 4585 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:21,443 INFO L93 Difference]: Finished difference Result 6094 states and 8033 transitions. [2022-11-26 00:23:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:23:21,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-26 00:23:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:21,451 INFO L225 Difference]: With dead ends: 6094 [2022-11-26 00:23:21,451 INFO L226 Difference]: Without dead ends: 6092 [2022-11-26 00:23:21,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:23:21,453 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1203 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:21,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 2152 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:23:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2022-11-26 00:23:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 3751. [2022-11-26 00:23:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 1.3141333333333334) internal successors, (4928), 3750 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 4928 transitions. [2022-11-26 00:23:23,414 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 4928 transitions. Word has length 66 [2022-11-26 00:23:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:23,414 INFO L495 AbstractCegarLoop]: Abstraction has 3751 states and 4928 transitions. [2022-11-26 00:23:23,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 4928 transitions. [2022-11-26 00:23:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:23:23,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:23,417 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:23:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:23:23,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:23,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2087330740, now seen corresponding path program 1 times [2022-11-26 00:23:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870977971] [2022-11-26 00:23:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:23,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:24,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870977971] [2022-11-26 00:23:24,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870977971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090200967] [2022-11-26 00:23:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:24,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:24,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:23:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:24,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:23:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:23:25,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:23:25,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090200967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:25,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:23:25,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-11-26 00:23:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934366460] [2022-11-26 00:23:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:23:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:23:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:23:25,438 INFO L87 Difference]: Start difference. First operand 3751 states and 4928 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:28,872 INFO L93 Difference]: Finished difference Result 6558 states and 8630 transitions. [2022-11-26 00:23:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:23:28,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-26 00:23:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:28,877 INFO L225 Difference]: With dead ends: 6558 [2022-11-26 00:23:28,877 INFO L226 Difference]: Without dead ends: 5036 [2022-11-26 00:23:28,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:23:28,879 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 2417 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2417 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:28,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2417 Valid, 790 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:23:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2022-11-26 00:23:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 3737. [2022-11-26 00:23:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 1.3150428265524625) internal successors, (4913), 3736 states have internal predecessors, (4913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 4913 transitions. [2022-11-26 00:23:30,672 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 4913 transitions. Word has length 68 [2022-11-26 00:23:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:30,673 INFO L495 AbstractCegarLoop]: Abstraction has 3737 states and 4913 transitions. [2022-11-26 00:23:30,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 4913 transitions. [2022-11-26 00:23:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:23:30,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:30,676 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:23:30,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:30,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1366895842, now seen corresponding path program 1 times [2022-11-26 00:23:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:30,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090126482] [2022-11-26 00:23:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:30,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:31,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:31,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090126482] [2022-11-26 00:23:31,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090126482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:31,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588809448] [2022-11-26 00:23:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:31,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:31,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:31,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:31,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:23:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:32,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:23:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:23:32,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:23:32,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588809448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:32,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:23:32,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2022-11-26 00:23:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040851191] [2022-11-26 00:23:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:32,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:23:32,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:23:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:23:32,476 INFO L87 Difference]: Start difference. First operand 3737 states and 4913 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:35,152 INFO L93 Difference]: Finished difference Result 6125 states and 8077 transitions. [2022-11-26 00:23:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:23:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-26 00:23:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:35,159 INFO L225 Difference]: With dead ends: 6125 [2022-11-26 00:23:35,159 INFO L226 Difference]: Without dead ends: 4600 [2022-11-26 00:23:35,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:23:35,162 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1073 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:35,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 640 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:23:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2022-11-26 00:23:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3545. [2022-11-26 00:23:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3544 states have (on average 1.3123589164785554) internal successors, (4651), 3544 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4651 transitions. [2022-11-26 00:23:36,730 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4651 transitions. Word has length 68 [2022-11-26 00:23:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:36,730 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 4651 transitions. [2022-11-26 00:23:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4651 transitions. [2022-11-26 00:23:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:23:36,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:36,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:36,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:36,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:36,940 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1723361321, now seen corresponding path program 1 times [2022-11-26 00:23:36,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:36,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531813870] [2022-11-26 00:23:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:36,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:37,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531813870] [2022-11-26 00:23:37,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531813870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:37,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:37,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:23:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182819022] [2022-11-26 00:23:37,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:23:37,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:23:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:23:37,234 INFO L87 Difference]: Start difference. First operand 3545 states and 4651 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:40,267 INFO L93 Difference]: Finished difference Result 5632 states and 7442 transitions. [2022-11-26 00:23:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:23:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-26 00:23:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:40,274 INFO L225 Difference]: With dead ends: 5632 [2022-11-26 00:23:40,274 INFO L226 Difference]: Without dead ends: 5630 [2022-11-26 00:23:40,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:23:40,276 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1256 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:40,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1256 Valid, 2275 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:23:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2022-11-26 00:23:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 3513. [2022-11-26 00:23:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 1.3129271070615034) internal successors, (4611), 3512 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 4611 transitions. [2022-11-26 00:23:41,859 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 4611 transitions. Word has length 69 [2022-11-26 00:23:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:41,860 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 4611 transitions. [2022-11-26 00:23:41,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 4611 transitions. [2022-11-26 00:23:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:23:41,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:41,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:41,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:23:41,864 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1684248653, now seen corresponding path program 1 times [2022-11-26 00:23:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:41,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195384088] [2022-11-26 00:23:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:42,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195384088] [2022-11-26 00:23:42,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195384088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:42,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:42,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:23:42,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450111750] [2022-11-26 00:23:42,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:42,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:23:42,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:23:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:23:42,154 INFO L87 Difference]: Start difference. First operand 3513 states and 4611 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:45,507 INFO L93 Difference]: Finished difference Result 6022 states and 7925 transitions. [2022-11-26 00:23:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:23:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-26 00:23:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:45,518 INFO L225 Difference]: With dead ends: 6022 [2022-11-26 00:23:45,519 INFO L226 Difference]: Without dead ends: 6020 [2022-11-26 00:23:45,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:23:45,521 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 1187 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:45,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 2276 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:23:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2022-11-26 00:23:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 3803. [2022-11-26 00:23:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 1.3103629668595476) internal successors, (4982), 3802 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 4982 transitions. [2022-11-26 00:23:47,481 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 4982 transitions. Word has length 69 [2022-11-26 00:23:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:47,481 INFO L495 AbstractCegarLoop]: Abstraction has 3803 states and 4982 transitions. [2022-11-26 00:23:47,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 4982 transitions. [2022-11-26 00:23:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:23:47,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:47,483 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:23:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 00:23:47,483 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:23:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1065306284, now seen corresponding path program 1 times [2022-11-26 00:23:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461455084] [2022-11-26 00:23:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:48,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:48,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461455084] [2022-11-26 00:23:48,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461455084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:48,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352660837] [2022-11-26 00:23:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:48,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:48,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:48,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:48,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:23:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:23:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:53,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352660837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029300113] [2022-11-26 00:24:07,907 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2022-11-26 00:24:07,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:24:07,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:24:07,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:24:07,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:24:08,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:24:08,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:24:08,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:24:08,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:08,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:08,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:24:13,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:25:31,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1029300113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:25:31,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:25:31,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [16, 25, 25] total 101 [2022-11-26 00:25:31,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720327728] [2022-11-26 00:25:31,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:25:31,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 00:25:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:25:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 00:25:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1827, Invalid=8273, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 00:25:31,996 INFO L87 Difference]: Start difference. First operand 3803 states and 4982 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:26:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:01,314 INFO L93 Difference]: Finished difference Result 5414 states and 7150 transitions. [2022-11-26 00:26:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:26:01,314 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-26 00:26:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:01,318 INFO L225 Difference]: With dead ends: 5414 [2022-11-26 00:26:01,318 INFO L226 Difference]: Without dead ends: 3808 [2022-11-26 00:26:01,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 83.1s TimeCoverageRelationStatistics Valid=1827, Invalid=8273, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 00:26:01,323 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 11 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 7549 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 7552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:01,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 441 Invalid, 7552 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 7549 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time] [2022-11-26 00:26:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2022-11-26 00:26:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3807. [2022-11-26 00:26:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 1.3100367840252234) internal successors, (4986), 3806 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:26:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 4986 transitions. [2022-11-26 00:26:03,357 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 4986 transitions. Word has length 69 [2022-11-26 00:26:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:03,358 INFO L495 AbstractCegarLoop]: Abstraction has 3807 states and 4986 transitions. [2022-11-26 00:26:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:26:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 4986 transitions. [2022-11-26 00:26:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:26:03,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:03,361 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:26:03,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:26:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 00:26:03,568 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:26:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1092583132, now seen corresponding path program 1 times [2022-11-26 00:26:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232506223] [2022-11-26 00:26:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:26:04,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232506223] [2022-11-26 00:26:04,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232506223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:26:04,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802967502] [2022-11-26 00:26:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:04,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:26:04,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:26:04,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:26:04,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:26:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:04,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-26 00:26:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:26:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:26:06,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:26:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:26:11,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802967502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:26:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454945858] [2022-11-26 00:26:11,752 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2022-11-26 00:26:11,752 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:26:11,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:26:11,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:26:11,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:26:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:26:11,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:26:11,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:26:11,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:26:11,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:26:38,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:24,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '252405#(and (= ~__return_1867~0 0) (= ~__return_2409~0 0) (= ~__return_1391~0 0) (= ~__return_1231~0 0) (<= 1 ~__return_1191~0) (= ~__return_1221~0 0) (<= ~send3~0 127) (= ~__return_1371~0 0) (<= 0 ~id3~0) (<= (+ |ULTIMATE.start_main_~node1__m1~64#1| 1) 0) (= ~__return_1281~0 0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~37#1| 1) 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~13#1| 127) (= ~__return_1401~0 0) (= ~__return_1451~0 0) (<= 1 ~__return_103~0) (<= 1 ~__return_2215~0) (= ~__return_4237~0 0) (<= ~st3~0 0) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1|) (= ~__return_1331~0 0) (= ~__return_1181~0 0) (<= 0 (+ ~p1_old~0 1)) (= ~__return_1461~0 0) (= ~__return_1241~0 0) (= ~__return_1571~0 0) (<= 0 ~id1~0) (= ~__return_4374~0 0) (= ~__return_1291~0 0) (= |ULTIMATE.start_main_~check__tmp~69#1| 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_1381~0 0) (= ~__return_1471~0 0) (= ~__return_1121~0 0) (= ~__return_1421~0 0) (= ~__return_1271~0 0) (= ~__return_1171~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~43#1| 1)) (= ~__return_1101~0 0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (= ~__return_3325~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~36#1| 1)) (= ~__return_3264~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~46#1| 1) 0) (= ~__return_2711~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~46#1| 1)) (= ~__return_1441~0 0) (= ~__return_1141~0 0) (<= ~mode2~0 1) (= ~__return_1491~0 0) (<= 0 ~st1~0) (<= ~__return_1191~0 1) (= |ULTIMATE.start_main_~check__tmp~67#1| 1) (<= |ULTIMATE.start_main_~assert__arg~68#1| 1) (<= ~__return_103~0 1) (<= 0 ~st2~0) (= ~__return_2299~0 0) (= ~__return_1341~0 0) (<= ~mode3~0 1) (= ~__return_1311~0 0) (= ~__return_1251~0 0) (= ~__return_3177~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~37#1| 1)) (= ~__return_1321~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~66#1|) (<= 0 ~send2~0) (= ~__return_3610~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= 0 (+ ~p2_old~0 1)) (= ~__return_1551~0 0) (<= ~id1~0 127) (= ~__return_1151~0 0) (= ~__return_1531~0 0) (= ~__return_4015~0 0) (= ~__return_4126~0 0) (= ~__return_3499~0 0) (= ~__return_1301~0 0) (<= |ULTIMATE.start_main_~assert__arg~66#1| 1) (= ~__return_1561~0 0) (= ~__return_1131~0 0) (<= ~send2~0 127) (= ~__return_2650~0 0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ ~p2_new~0 1)) (= ~__return_1351~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (= ~__return_1431~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~44#1| 1)) (= ~__return_2798~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= |ULTIMATE.start_main_~__tmp_67~0#1| 1) (<= ~__return_5061~0 1) (<= ~st2~0 0) (= ~__return_3817~0 0) (<= (+ ~p2_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~47#1| 1)) (= ~__return_1261~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~64#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~43#1| 1) 0) (= ~__return_1201~0 0) (= ~__return_2885~0 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1| 127) (= ~__return_1481~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_2563~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_69~0#1|) (<= ~id3~0 127) (= ~__return_1501~0 0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= ~__return_1521~0 0) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~13#1|) (<= ~__return_2215~0 1) (= ~__return_1361~0 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= |ULTIMATE.start_main_~__tmp_69~0#1| 1) (<= 0 |ULTIMATE.start_main_~assert__arg~68#1|) (= ~__return_2061~0 0) (<= (+ ~p3_new~0 1) 0) (= ~__return_1211~0 0) (= ~__return_1161~0 0) (= ~__return_1951~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~47#1| 1) 0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= ~__return_3928~0 0) (<= (+ ~p1_old~0 1) 0) (<= |ULTIMATE.start_main_~check__tmp~58#1| 1) (<= 0 ~send3~0) (= ~p1~0 0) (= ~__return_1541~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~__tmp_67~0#1|) (= ~__return_main~0 0) (= ~__return_3412~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~36#1| 1) 0) (<= (+ |ULTIMATE.start_main_~node3__m3~44#1| 1) 0) (= ~__return_2996~0 0) (= ~__return_1111~0 0) (= ~__return_1511~0 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= ~__return_1411~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-26 00:28:24,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:28:24,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:24,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-11-26 00:28:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955951632] [2022-11-26 00:28:24,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 00:28:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 00:28:24,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=6633, Unknown=0, NotChecked=0, Total=7656 [2022-11-26 00:28:24,512 INFO L87 Difference]: Start difference. First operand 3807 states and 4986 transitions. Second operand has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 41 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:54,599 INFO L93 Difference]: Finished difference Result 18364 states and 24654 transitions. [2022-11-26 00:28:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-26 00:28:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 41 states have internal predecessors, (196), 0 states have call successors, (0), 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 69 [2022-11-26 00:28:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:54,620 INFO L225 Difference]: With dead ends: 18364 [2022-11-26 00:28:54,620 INFO L226 Difference]: Without dead ends: 16339 [2022-11-26 00:28:54,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 125 SyntacticMatches, 12 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13648 ImplicationChecksByTransitivity, 123.1s TimeCoverageRelationStatistics Valid=3418, Invalid=28444, Unknown=0, NotChecked=0, Total=31862 [2022-11-26 00:28:54,629 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 5454 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 3873 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5454 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 4160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:54,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5454 Valid, 3946 Invalid, 4160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3873 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-26 00:28:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16339 states. [2022-11-26 00:28:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16339 to 7460. [2022-11-26 00:28:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 1.3145193725700497) internal successors, (9805), 7459 states have internal predecessors, (9805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 9805 transitions. [2022-11-26 00:28:59,266 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 9805 transitions. Word has length 69 [2022-11-26 00:28:59,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:59,266 INFO L495 AbstractCegarLoop]: Abstraction has 7460 states and 9805 transitions. [2022-11-26 00:28:59,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 41 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 9805 transitions. [2022-11-26 00:28:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:28:59,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:59,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:59,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:28:59,484 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:28:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1048136402, now seen corresponding path program 1 times [2022-11-26 00:28:59,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:59,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979873777] [2022-11-26 00:28:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:28:59,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:59,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979873777] [2022-11-26 00:28:59,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979873777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:59,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:59,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:28:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680433114] [2022-11-26 00:28:59,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:59,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:28:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:28:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:28:59,707 INFO L87 Difference]: Start difference. First operand 7460 states and 9805 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:08,403 INFO L93 Difference]: Finished difference Result 12384 states and 16164 transitions. [2022-11-26 00:29:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:29:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-26 00:29:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:08,416 INFO L225 Difference]: With dead ends: 12384 [2022-11-26 00:29:08,416 INFO L226 Difference]: Without dead ends: 10638 [2022-11-26 00:29:08,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:29:08,420 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 1132 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:08,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 1295 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10638 states. [2022-11-26 00:29:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10638 to 7441. [2022-11-26 00:29:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7441 states, 7440 states have (on average 1.3149193548387097) internal successors, (9783), 7440 states have internal predecessors, (9783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7441 states to 7441 states and 9783 transitions. [2022-11-26 00:29:13,031 INFO L78 Accepts]: Start accepts. Automaton has 7441 states and 9783 transitions. Word has length 70 [2022-11-26 00:29:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:13,031 INFO L495 AbstractCegarLoop]: Abstraction has 7441 states and 9783 transitions. [2022-11-26 00:29:13,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7441 states and 9783 transitions. [2022-11-26 00:29:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:29:13,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:13,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:29:13,034 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:29:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -517315488, now seen corresponding path program 1 times [2022-11-26 00:29:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:13,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222058556] [2022-11-26 00:29:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:13,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222058556] [2022-11-26 00:29:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222058556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:13,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736046770] [2022-11-26 00:29:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:13,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:13,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:29:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:14,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-26 00:29:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:18,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:31,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736046770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:31,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217204894] [2022-11-26 00:29:31,453 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-26 00:29:31,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:31,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:31,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:31,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:31,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:31,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:29:31,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:29:31,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:29:31,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:29:34,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:56,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [217204894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:56,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:56,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [16, 24, 24] total 97 [2022-11-26 00:30:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042329005] [2022-11-26 00:30:56,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:56,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:30:56,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:30:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1677, Invalid=7635, Unknown=0, NotChecked=0, Total=9312 [2022-11-26 00:30:56,701 INFO L87 Difference]: Start difference. First operand 7441 states and 9783 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:34,596 INFO L93 Difference]: Finished difference Result 9367 states and 12368 transitions. [2022-11-26 00:31:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:31:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-26 00:31:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:34,605 INFO L225 Difference]: With dead ends: 9367 [2022-11-26 00:31:34,605 INFO L226 Difference]: Without dead ends: 7430 [2022-11-26 00:31:34,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 124 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5106 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=1677, Invalid=7635, Unknown=0, NotChecked=0, Total=9312 [2022-11-26 00:31:34,608 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 7 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 7760 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 7763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:34,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 626 Invalid, 7763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 7760 Invalid, 0 Unknown, 0 Unchecked, 32.2s Time] [2022-11-26 00:31:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7430 states. [2022-11-26 00:31:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7430 to 7430. [2022-11-26 00:31:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 1.3145780051150895) internal successors, (9766), 7429 states have internal predecessors, (9766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 9766 transitions. [2022-11-26 00:31:39,665 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 9766 transitions. Word has length 71 [2022-11-26 00:31:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:39,666 INFO L495 AbstractCegarLoop]: Abstraction has 7430 states and 9766 transitions. [2022-11-26 00:31:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 9766 transitions. [2022-11-26 00:31:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:31:39,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:39,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:39,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:39,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:39,870 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:31:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash 412284185, now seen corresponding path program 1 times [2022-11-26 00:31:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646049365] [2022-11-26 00:31:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:39,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646049365] [2022-11-26 00:31:39,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646049365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:39,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:31:39,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:31:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748659831] [2022-11-26 00:31:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:39,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:31:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:31:39,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:39,972 INFO L87 Difference]: Start difference. First operand 7430 states and 9766 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2022-11-26 00:31:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:46,777 INFO L93 Difference]: Finished difference Result 11093 states and 14763 transitions. [2022-11-26 00:31:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:31:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 [2022-11-26 00:31:46,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:46,790 INFO L225 Difference]: With dead ends: 11093 [2022-11-26 00:31:46,790 INFO L226 Difference]: Without dead ends: 9839 [2022-11-26 00:31:46,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:46,793 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 203 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:46,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 567 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:31:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9839 states. [2022-11-26 00:31:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9839 to 9300. [2022-11-26 00:31:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9300 states, 9299 states have (on average 1.3088504140230133) internal successors, (12171), 9299 states have internal predecessors, (12171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9300 states to 9300 states and 12171 transitions. [2022-11-26 00:31:53,570 INFO L78 Accepts]: Start accepts. Automaton has 9300 states and 12171 transitions. Word has length 71 [2022-11-26 00:31:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:53,570 INFO L495 AbstractCegarLoop]: Abstraction has 9300 states and 12171 transitions. [2022-11-26 00:31:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2022-11-26 00:31:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9300 states and 12171 transitions. [2022-11-26 00:31:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:31:53,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:53,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:31:53,575 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-26 00:31:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -847364941, now seen corresponding path program 1 times [2022-11-26 00:31:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846311343] [2022-11-26 00:31:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:54,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846311343] [2022-11-26 00:31:54,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846311343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:31:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029578117] [2022-11-26 00:31:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:54,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:54,714 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5374d93-a447-4344-935d-9542ed1b08af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:31:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:55,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-26 00:31:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:00,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:18,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029578117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105099790] [2022-11-26 00:32:18,318 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-26 00:32:18,319 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:32:18,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:32:18,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:32:18,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:32:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:32:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:18,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:18,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-26 00:32:53,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:17,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '388323#(and (= ~__return_1867~0 0) (= ~__return_2409~0 0) (= ~__return_1391~0 0) (= ~__return_1231~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_22~0#1|) (= |ULTIMATE.start_main_~check__tmp~21#1| 1) (<= 0 ~id3~0) (<= 0 |ULTIMATE.start_main_~assert__arg~49#1|) (= ~__return_1281~0 0) (<= 0 (+ ~p3_new~0 1)) (= ~__return_1401~0 0) (= ~__return_1451~0 0) (<= 1 ~__return_103~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~13#1|) (= ~__return_1331~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~11#1| 1) 0) (= ~__return_1181~0 0) (= ~__return_1461~0 0) (= ~__return_1241~0 0) (= ~__return_1571~0 0) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~45#1| 1)) (= ~__return_4374~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~19#1| 1)) (<= ~__return_3325~0 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_1381~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~19#1| 1) 0) (= ~__return_1471~0 0) (= ~__return_1121~0 0) (= ~__return_1421~0 0) (= ~__return_1271~0 0) (= ~__return_1171~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_50~0#1|) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~31#1| 1)) (<= 0 |ULTIMATE.start_main_~assert__arg~21#1|) (<= ~send1~0 127) (<= ~st1~0 0) (= ~__return_3264~0 0) (= ~__return_2711~0 0) (= ~__return_1441~0 0) (<= 0 (+ ~p3_old~0 1)) (= ~__return_1141~0 0) (<= 1 ~__return_3325~0) (<= ~mode2~0 1) (= ~__return_1491~0 0) (<= 0 ~st1~0) (<= ~r1~0 257) (<= ~__return_103~0 1) (<= 0 ~st2~0) (<= ~__return_1521~0 1) (<= ~mode3~0 1) (= ~__return_1311~0 0) (= ~__return_1251~0 0) (= ~__return_3177~0 0) (= ~__return_1321~0 0) (<= 0 ~__return_2299~0) (= ~__return_3610~0 0) (<= ~__return_1371~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (= ~__return_1551~0 0) (<= ~id1~0 127) (= ~__return_1531~0 0) (<= (+ ~p3_old~0 1) 0) (= ~__return_4015~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~34#1| 1)) (= ~__return_3499~0 0) (= ~__return_1561~0 0) (<= |ULTIMATE.start_main_~__tmp_50~0#1| 1) (<= ~__return_1191~0 0) (<= 0 ~__return_1101~0) (= ~__return_1131~0 0) (<= |ULTIMATE.start_main_~assert__arg~49#1| 1) (<= ~__return_1301~0 0) (<= ~__return_3928~0 0) (<= 0 ~__return_1371~0) (= ~__return_2650~0 0) (= |ULTIMATE.start_main_~check__tmp~49#1| 1) (<= 0 ~__return_1351~0) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (= ~__return_1431~0 0) (= ~__return_2798~0 0) (<= ~__return_1221~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~__return_5061~0 1) (= ~__return_3817~0 0) (<= (+ ~p2_new~0 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~13#1| 127) (<= 0 ~__return_1211~0) (<= ~__return_1361~0 0) (<= 0 ~__return_1221~0) (<= ~__return_1101~0 0) (= ~__return_1261~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~45#1| 1) 0) (<= 0 ~__return_4237~0) (= ~__return_1201~0 0) (<= ~__return_1211~0 0) (<= |ULTIMATE.start_main_~assert__arg~21#1| 1) (= ~__return_2885~0 0) (= ~__return_1481~0 0) (<= ~__return_1341~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_2563~0 0) (<= ~id3~0 127) (<= ~__return_2299~0 0) (<= ~__return_1151~0 0) (<= 0 ~__return_2215~0) (= ~__return_1501~0 0) (<= ~__return_1351~0 0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node2__m2~34#1| 1) 0) (<= ~__return_4237~0 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~__return_4126~0 0) (<= 0 ~__return_1291~0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~__tmp_22~0#1| 1) (<= 1 ~__return_1521~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (= ~__return_2061~0 0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~__return_1161~0 0) (= ~__return_1951~0 0) (= ~p3~0 0) (<= 0 ~__return_4126~0) (<= 0 (+ ~p1_new~0 1)) (<= ~__return_2215~0 0) (<= 0 ~__return_1191~0) (<= |ULTIMATE.start_main_~check__tmp~58#1| 1) (<= 0 ~__return_1341~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~__return_3928~0) (= ~p1~0 0) (= ~__return_1541~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= ~__return_1291~0 0) (= ~__return_main~0 0) (<= 0 ~__return_1151~0) (= ~__return_3412~0 0) (<= 0 ~__return_1301~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~11#1| 1)) (<= 0 ~__return_1361~0) (= ~__return_2996~0 0) (= ~__return_1111~0 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= (+ |ULTIMATE.start_main_~node3__m3~31#1| 1) 0) (= ~__return_1511~0 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= ~__return_1411~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-26 00:35:17,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:17,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:17,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 59 [2022-11-26 00:35:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844722571] [2022-11-26 00:35:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:17,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-26 00:35:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-26 00:35:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2022-11-26 00:35:17,614 INFO L87 Difference]: Start difference. First operand 9300 states and 12171 transitions. Second operand has 59 states, 59 states have (on average 3.711864406779661) internal successors, (219), 59 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)