./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7 --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 d869d36578fc433cb3bcbc293e270e4f10048025e6637a1ca792146288a88a6e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:31:27,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:31:27,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:31:27,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:31:27,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:31:27,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:31:27,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:31:27,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:31:27,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:31:27,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:31:27,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:31:27,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:31:27,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:31:27,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:31:27,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:31:27,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:31:27,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:31:27,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:31:27,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:31:27,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:31:27,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:31:27,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:31:27,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:31:27,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:31:27,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:31:27,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:31:27,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:31:27,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:31:27,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:31:27,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:31:27,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:31:27,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:31:27,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:31:27,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:31:27,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:31:27,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:31:27,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:31:27,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:31:27,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:31:27,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:31:27,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:31:27,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:31:27,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:31:27,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:31:27,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:31:27,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:31:27,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:31:27,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:31:27,964 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:31:27,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:31:27,964 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:31:27,965 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:31:27,965 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:31:27,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:31:27,966 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:31:27,966 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:31:27,966 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:31:27,967 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:31:27,967 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:31:27,967 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:31:27,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:31:27,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:31:27,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:31:27,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:31:27,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:31:27,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:31:27,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:31:27,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:31:27,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:31:27,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:31:27,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:31:27,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:31:27,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:31:27,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:31:27,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:27,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:31:27,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:31:27,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:31:27,973 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:31:27,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:31:27,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:31:27,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:31:27,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:31:27,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d869d36578fc433cb3bcbc293e270e4f10048025e6637a1ca792146288a88a6e [2021-11-25 18:31:28,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:31:28,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:31:28,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:31:28,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:31:28,273 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:31:28,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 18:31:28,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/data/7f90c750b/9968ff5f9ef34b968ba18a6d467e69ae/FLAG392e66bf9 [2021-11-25 18:31:29,024 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:31:29,024 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 18:31:29,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/data/7f90c750b/9968ff5f9ef34b968ba18a6d467e69ae/FLAG392e66bf9 [2021-11-25 18:31:29,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/data/7f90c750b/9968ff5f9ef34b968ba18a6d467e69ae [2021-11-25 18:31:29,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:31:29,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:31:29,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:29,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:31:29,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:31:29,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:29" (1/1) ... [2021-11-25 18:31:29,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31741f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:29, skipping insertion in model container [2021-11-25 18:31:29,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:29" (1/1) ... [2021-11-25 18:31:29,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:31:29,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:31:29,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24323,24336] [2021-11-25 18:31:30,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28161,28174] [2021-11-25 18:31:30,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:30,205 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:31:30,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24323,24336] [2021-11-25 18:31:30,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28161,28174] [2021-11-25 18:31:30,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:30,573 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:31:30,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30 WrapperNode [2021-11-25 18:31:30,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:30,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:30,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:31:30,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:31:30,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,716 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2380 [2021-11-25 18:31:30,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:30,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:31:30,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:31:30,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:31:30,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:31:30,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:31:30,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:31:30,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:31:30,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (1/1) ... [2021-11-25 18:31:30,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:30,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:31:30,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdfc9d20-008d-4650-b057-2ccba3487bb5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:31:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:31:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:31:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:31:30,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:31:31,166 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:31:31,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:31:32,844 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:31:33,416 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:31:33,416 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:31:33,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:33 BoogieIcfgContainer [2021-11-25 18:31:33,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:31:33,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:31:33,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:31:33,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:31:33,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:31:29" (1/3) ... [2021-11-25 18:31:33,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a526fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:31:33, skipping insertion in model container [2021-11-25 18:31:33,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:30" (2/3) ... [2021-11-25 18:31:33,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a526fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:31:33, skipping insertion in model container [2021-11-25 18:31:33,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:33" (3/3) ... [2021-11-25 18:31:33,434 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 18:31:33,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:31:33,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:31:33,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:31:33,525 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:31:33,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:31:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 490 states, 487 states have (on average 1.7166324435318274) internal successors, (836), 489 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-25 18:31:33,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:33,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:33,611 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1693198294, now seen corresponding path program 1 times [2021-11-25 18:31:33,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:33,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636466128] [2021-11-25 18:31:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:33,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:34,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636466128] [2021-11-25 18:31:34,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636466128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:34,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:34,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:34,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731448066] [2021-11-25 18:31:34,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:34,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:34,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:34,795 INFO L87 Difference]: Start difference. First operand has 490 states, 487 states have (on average 1.7166324435318274) internal successors, (836), 489 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:35,306 INFO L93 Difference]: Finished difference Result 1442 states and 2463 transitions. [2021-11-25 18:31:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2021-11-25 18:31:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:35,337 INFO L225 Difference]: With dead ends: 1442 [2021-11-25 18:31:35,337 INFO L226 Difference]: Without dead ends: 957 [2021-11-25 18:31:35,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:35,352 INFO L933 BasicCegarLoop]: 1282 mSDtfsCounter, 1823 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1823 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:35,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1823 Valid, 2032 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:31:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-25 18:31:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2021-11-25 18:31:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 934 states have (on average 1.4089935760171306) internal successors, (1316), 935 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1316 transitions. [2021-11-25 18:31:35,497 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1316 transitions. Word has length 210 [2021-11-25 18:31:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:35,499 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1316 transitions. [2021-11-25 18:31:35,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1316 transitions. [2021-11-25 18:31:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-25 18:31:35,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:35,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:35,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:31:35,509 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash -981193504, now seen corresponding path program 1 times [2021-11-25 18:31:35,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981645210] [2021-11-25 18:31:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:35,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:35,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981645210] [2021-11-25 18:31:35,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981645210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:35,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:35,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:35,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913787206] [2021-11-25 18:31:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:35,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:35,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:35,821 INFO L87 Difference]: Start difference. First operand 936 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:36,139 INFO L93 Difference]: Finished difference Result 2655 states and 3710 transitions. [2021-11-25 18:31:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-25 18:31:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:36,158 INFO L225 Difference]: With dead ends: 2655 [2021-11-25 18:31:36,158 INFO L226 Difference]: Without dead ends: 1840 [2021-11-25 18:31:36,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:36,165 INFO L933 BasicCegarLoop]: 1198 mSDtfsCounter, 567 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:36,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1816 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-11-25 18:31:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1819. [2021-11-25 18:31:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1817 states have (on average 1.407264722069345) internal successors, (2557), 1818 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2557 transitions. [2021-11-25 18:31:36,265 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2557 transitions. Word has length 212 [2021-11-25 18:31:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:36,268 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2557 transitions. [2021-11-25 18:31:36,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2557 transitions. [2021-11-25 18:31:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-25 18:31:36,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:36,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:36,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:31:36,283 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1113227240, now seen corresponding path program 1 times [2021-11-25 18:31:36,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:36,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514352268] [2021-11-25 18:31:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:36,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:36,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514352268] [2021-11-25 18:31:36,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514352268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:36,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:36,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:36,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171780766] [2021-11-25 18:31:36,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:36,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:36,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:36,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:36,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:36,389 INFO L87 Difference]: Start difference. First operand 1819 states and 2557 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:36,805 INFO L93 Difference]: Finished difference Result 5305 states and 7438 transitions. [2021-11-25 18:31:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:36,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-25 18:31:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:36,828 INFO L225 Difference]: With dead ends: 5305 [2021-11-25 18:31:36,828 INFO L226 Difference]: Without dead ends: 3618 [2021-11-25 18:31:36,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:36,832 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 676 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:36,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1918 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-25 18:31:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 1822. [2021-11-25 18:31:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1820 states have (on average 1.4065934065934067) internal successors, (2560), 1821 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2560 transitions. [2021-11-25 18:31:36,960 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2560 transitions. Word has length 212 [2021-11-25 18:31:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:36,961 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 2560 transitions. [2021-11-25 18:31:36,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2560 transitions. [2021-11-25 18:31:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-25 18:31:36,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:36,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:36,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:31:36,967 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1513995603, now seen corresponding path program 1 times [2021-11-25 18:31:36,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:36,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577833082] [2021-11-25 18:31:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:36,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:37,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:37,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577833082] [2021-11-25 18:31:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577833082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:37,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:31:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171228741] [2021-11-25 18:31:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:31:37,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:31:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:37,425 INFO L87 Difference]: Start difference. First operand 1822 states and 2560 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:37,880 INFO L93 Difference]: Finished difference Result 5264 states and 7375 transitions. [2021-11-25 18:31:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:37,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-25 18:31:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:37,901 INFO L225 Difference]: With dead ends: 5264 [2021-11-25 18:31:37,901 INFO L226 Difference]: Without dead ends: 3457 [2021-11-25 18:31:37,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:37,906 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 2150 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:37,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2150 Valid, 1638 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-11-25 18:31:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3436. [2021-11-25 18:31:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3434 states have (on average 1.3940011648223647) internal successors, (4787), 3435 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 4787 transitions. [2021-11-25 18:31:38,201 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 4787 transitions. Word has length 213 [2021-11-25 18:31:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 4787 transitions. [2021-11-25 18:31:38,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 4787 transitions. [2021-11-25 18:31:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-25 18:31:38,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:38,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:38,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:31:38,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1170298391, now seen corresponding path program 1 times [2021-11-25 18:31:38,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:38,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678178832] [2021-11-25 18:31:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:38,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:38,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:38,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678178832] [2021-11-25 18:31:38,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678178832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:38,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:38,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:38,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511161932] [2021-11-25 18:31:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:38,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:38,657 INFO L87 Difference]: Start difference. First operand 3436 states and 4787 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:39,419 INFO L93 Difference]: Finished difference Result 10016 states and 13924 transitions. [2021-11-25 18:31:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:39,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2021-11-25 18:31:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:39,460 INFO L225 Difference]: With dead ends: 10016 [2021-11-25 18:31:39,460 INFO L226 Difference]: Without dead ends: 6718 [2021-11-25 18:31:39,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:39,478 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 1469 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:39,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1635 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2021-11-25 18:31:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6697. [2021-11-25 18:31:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 6695 states have (on average 1.3856609410007468) internal successors, (9277), 6696 states have internal predecessors, (9277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 9277 transitions. [2021-11-25 18:31:40,026 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 9277 transitions. Word has length 214 [2021-11-25 18:31:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:40,026 INFO L470 AbstractCegarLoop]: Abstraction has 6697 states and 9277 transitions. [2021-11-25 18:31:40,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 9277 transitions. [2021-11-25 18:31:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-25 18:31:40,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:40,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:40,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:31:40,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1674194278, now seen corresponding path program 1 times [2021-11-25 18:31:40,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:40,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852545525] [2021-11-25 18:31:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:40,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:40,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852545525] [2021-11-25 18:31:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852545525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:40,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:40,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:40,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275838548] [2021-11-25 18:31:40,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:40,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:40,358 INFO L87 Difference]: Start difference. First operand 6697 states and 9277 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:41,442 INFO L93 Difference]: Finished difference Result 19615 states and 27118 transitions. [2021-11-25 18:31:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:41,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-25 18:31:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:41,553 INFO L225 Difference]: With dead ends: 19615 [2021-11-25 18:31:41,553 INFO L226 Difference]: Without dead ends: 13060 [2021-11-25 18:31:41,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:41,567 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 1448 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:41,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 1612 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13060 states. [2021-11-25 18:31:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13060 to 13039. [2021-11-25 18:31:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13039 states, 13037 states have (on average 1.3740891309350312) internal successors, (17914), 13038 states have internal predecessors, (17914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13039 states to 13039 states and 17914 transitions. [2021-11-25 18:31:42,612 INFO L78 Accepts]: Start accepts. Automaton has 13039 states and 17914 transitions. Word has length 216 [2021-11-25 18:31:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 13039 states and 17914 transitions. [2021-11-25 18:31:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 13039 states and 17914 transitions. [2021-11-25 18:31:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-25 18:31:42,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:42,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:42,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:31:42,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1621503621, now seen corresponding path program 1 times [2021-11-25 18:31:42,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:42,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240092755] [2021-11-25 18:31:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:42,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:42,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240092755] [2021-11-25 18:31:42,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240092755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:42,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:42,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:42,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135388496] [2021-11-25 18:31:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:42,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:42,757 INFO L87 Difference]: Start difference. First operand 13039 states and 17914 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:44,454 INFO L93 Difference]: Finished difference Result 37040 states and 50583 transitions. [2021-11-25 18:31:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-25 18:31:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:44,523 INFO L225 Difference]: With dead ends: 37040 [2021-11-25 18:31:44,523 INFO L226 Difference]: Without dead ends: 25563 [2021-11-25 18:31:44,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:44,546 INFO L933 BasicCegarLoop]: 1212 mSDtfsCounter, 550 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:44,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1830 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25563 states. [2021-11-25 18:31:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25563 to 25542. [2021-11-25 18:31:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25542 states, 25540 states have (on average 1.3669929522317932) internal successors, (34913), 25541 states have internal predecessors, (34913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25542 states to 25542 states and 34913 transitions. [2021-11-25 18:31:46,415 INFO L78 Accepts]: Start accepts. Automaton has 25542 states and 34913 transitions. Word has length 218 [2021-11-25 18:31:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:46,416 INFO L470 AbstractCegarLoop]: Abstraction has 25542 states and 34913 transitions. [2021-11-25 18:31:46,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 25542 states and 34913 transitions. [2021-11-25 18:31:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-25 18:31:46,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:46,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:46,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:31:46,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2084475563, now seen corresponding path program 1 times [2021-11-25 18:31:46,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:46,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941673215] [2021-11-25 18:31:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:46,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:46,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941673215] [2021-11-25 18:31:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941673215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:46,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:46,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:46,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140820223] [2021-11-25 18:31:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:46,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:46,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:46,659 INFO L87 Difference]: Start difference. First operand 25542 states and 34913 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:49,048 INFO L93 Difference]: Finished difference Result 74691 states and 101857 transitions. [2021-11-25 18:31:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:49,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-25 18:31:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:49,197 INFO L225 Difference]: With dead ends: 74691 [2021-11-25 18:31:49,198 INFO L226 Difference]: Without dead ends: 50835 [2021-11-25 18:31:49,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:49,246 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 652 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:49,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1897 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50835 states. [2021-11-25 18:31:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50835 to 25575. [2021-11-25 18:31:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25575 states, 25573 states have (on average 1.366519375904274) internal successors, (34946), 25574 states have internal predecessors, (34946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25575 states to 25575 states and 34946 transitions. [2021-11-25 18:31:51,161 INFO L78 Accepts]: Start accepts. Automaton has 25575 states and 34946 transitions. Word has length 218 [2021-11-25 18:31:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:51,162 INFO L470 AbstractCegarLoop]: Abstraction has 25575 states and 34946 transitions. [2021-11-25 18:31:51,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25575 states and 34946 transitions. [2021-11-25 18:31:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-25 18:31:51,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:51,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:51,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:31:51,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash 233775084, now seen corresponding path program 1 times [2021-11-25 18:31:51,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857740733] [2021-11-25 18:31:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:51,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:51,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857740733] [2021-11-25 18:31:51,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857740733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:51,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:51,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:31:51,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655397224] [2021-11-25 18:31:51,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:51,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:31:51,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:31:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:51,637 INFO L87 Difference]: Start difference. First operand 25575 states and 34946 transitions. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 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) [2021-11-25 18:31:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:54,568 INFO L93 Difference]: Finished difference Result 74016 states and 100821 transitions. [2021-11-25 18:31:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 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) Word has length 219 [2021-11-25 18:31:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:54,686 INFO L225 Difference]: With dead ends: 74016 [2021-11-25 18:31:54,686 INFO L226 Difference]: Without dead ends: 48641 [2021-11-25 18:31:54,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:31:54,719 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 2122 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2122 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:54,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2122 Valid, 1628 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:31:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48641 states. [2021-11-25 18:31:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48641 to 48620. [2021-11-25 18:31:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48620 states, 48618 states have (on average 1.3545806080052656) internal successors, (65857), 48619 states have internal predecessors, (65857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48620 states to 48620 states and 65857 transitions. [2021-11-25 18:31:57,808 INFO L78 Accepts]: Start accepts. Automaton has 48620 states and 65857 transitions. Word has length 219 [2021-11-25 18:31:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:57,809 INFO L470 AbstractCegarLoop]: Abstraction has 48620 states and 65857 transitions. [2021-11-25 18:31:57,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 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) [2021-11-25 18:31:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 48620 states and 65857 transitions. [2021-11-25 18:31:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-25 18:31:57,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:57,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:57,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:31:57,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash -636370262, now seen corresponding path program 1 times [2021-11-25 18:31:57,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:57,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104591805] [2021-11-25 18:31:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:57,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:58,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:58,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104591805] [2021-11-25 18:31:58,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104591805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:58,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:58,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:58,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653550988] [2021-11-25 18:31:58,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:58,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:58,156 INFO L87 Difference]: Start difference. First operand 48620 states and 65857 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:32:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:03,406 INFO L93 Difference]: Finished difference Result 141556 states and 191173 transitions. [2021-11-25 18:32:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:32:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-11-25 18:32:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:03,606 INFO L225 Difference]: With dead ends: 141556 [2021-11-25 18:32:03,606 INFO L226 Difference]: Without dead ends: 95200 [2021-11-25 18:32:03,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:32:03,858 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 1459 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:03,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 1631 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:32:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95200 states. [2021-11-25 18:32:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95200 to 95179. [2021-11-25 18:32:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95179 states, 95177 states have (on average 1.347006104415983) internal successors, (128204), 95178 states have internal predecessors, (128204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:32:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95179 states to 95179 states and 128204 transitions. [2021-11-25 18:32:10,040 INFO L78 Accepts]: Start accepts. Automaton has 95179 states and 128204 transitions. Word has length 220 [2021-11-25 18:32:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:10,040 INFO L470 AbstractCegarLoop]: Abstraction has 95179 states and 128204 transitions. [2021-11-25 18:32:10,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:32:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 95179 states and 128204 transitions. [2021-11-25 18:32:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-25 18:32:10,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:10,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:10,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:32:10,215 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 831942124, now seen corresponding path program 1 times [2021-11-25 18:32:10,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:10,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816756137] [2021-11-25 18:32:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:10,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:32:10,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816756137] [2021-11-25 18:32:10,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816756137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:32:10,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:32:10,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:32:10,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595090859] [2021-11-25 18:32:10,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:32:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:32:10,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:32:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:32:10,748 INFO L87 Difference]: Start difference. First operand 95179 states and 128204 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:32:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:17,157 INFO L93 Difference]: Finished difference Result 207185 states and 278550 transitions. [2021-11-25 18:32:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:32:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2021-11-25 18:32:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:17,404 INFO L225 Difference]: With dead ends: 207185 [2021-11-25 18:32:17,404 INFO L226 Difference]: Without dead ends: 113507 [2021-11-25 18:32:17,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:32:17,489 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 1432 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:17,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 1602 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:32:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113507 states.