./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54279535a13e8158f88d9d9b5db1799d2b3d70a14030175542187aacc84265bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:35:42,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:35:42,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:35:43,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:35:43,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:35:43,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:35:43,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:35:43,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:35:43,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:35:43,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:35:43,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:35:43,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:35:43,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:35:43,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:35:43,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:35:43,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:35:43,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:35:43,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:35:43,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:35:43,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:35:43,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:35:43,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:35:43,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:35:43,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:35:43,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:35:43,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:35:43,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:35:43,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:35:43,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:35:43,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:35:43,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:35:43,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:35:43,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:35:43,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:35:43,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:35:43,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:35:43,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:35:43,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:35:43,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:35:43,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:35:43,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:35:43,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:35:43,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:35:43,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:35:43,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:35:43,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:35:43,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:35:43,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:35:43,085 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:35:43,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:35:43,086 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:35:43,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:35:43,087 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:35:43,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:35:43,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:35:43,088 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:35:43,088 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:35:43,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:35:43,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:35:43,094 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:35:43,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:35:43,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:35:43,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:35:43,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:35:43,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:35:43,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:35:43,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:35:43,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:35:43,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:35:43,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:35:43,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:35:43,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:35:43,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:35:43,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:35:43,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:43,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:35:43,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:35:43,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:35:43,101 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:35:43,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:35:43,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:35:43,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:35:43,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:35:43,103 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_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54279535a13e8158f88d9d9b5db1799d2b3d70a14030175542187aacc84265bd [2021-11-20 23:35:43,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:35:43,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:35:43,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:35:43,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:35:43,380 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:35:43,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-20 23:35:43,451 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/data/a1ed5c547/9664b5a604f64e0ab14ce576ce40076d/FLAG90d78df0a [2021-11-20 23:35:44,139 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:35:44,140 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-20 23:35:44,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/data/a1ed5c547/9664b5a604f64e0ab14ce576ce40076d/FLAG90d78df0a [2021-11-20 23:35:44,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/data/a1ed5c547/9664b5a604f64e0ab14ce576ce40076d [2021-11-20 23:35:44,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:35:44,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:35:44,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:44,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:35:44,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:35:44,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:44" (1/1) ... [2021-11-20 23:35:44,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65181882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:44, skipping insertion in model container [2021-11-20 23:35:44,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:44" (1/1) ... [2021-11-20 23:35:44,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:35:44,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:35:45,104 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_1b7fbf9f-45d6-4d25-b726-4f27581296e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[36688,36701] [2021-11-20 23:35:45,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:45,510 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:35:45,887 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_1b7fbf9f-45d6-4d25-b726-4f27581296e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[36688,36701] [2021-11-20 23:35:46,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:46,235 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:35:46,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46 WrapperNode [2021-11-20 23:35:46,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:46,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:46,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:35:46,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:35:46,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,422 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5005 [2021-11-20 23:35:46,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:46,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:35:46,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:35:46,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:35:46,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:35:46,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:35:46,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:35:46,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:35:46,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (1/1) ... [2021-11-20 23:35:46,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:46,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:46,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:35:46,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7fbf9f-45d6-4d25-b726-4f27581296e9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:35:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:35:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:35:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:35:46,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:35:46,923 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:35:46,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:35:49,853 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:35:51,399 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:35:51,399 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:35:51,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:51 BoogieIcfgContainer [2021-11-20 23:35:51,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:35:51,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:35:51,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:35:51,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:35:51,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:44" (1/3) ... [2021-11-20 23:35:51,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32c561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:51, skipping insertion in model container [2021-11-20 23:35:51,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:46" (2/3) ... [2021-11-20 23:35:51,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32c561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:51, skipping insertion in model container [2021-11-20 23:35:51,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:51" (3/3) ... [2021-11-20 23:35:51,417 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-20 23:35:51,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:35:51,423 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:35:51,478 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:35:51,486 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:35:51,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:35:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 1141 states, 1139 states have (on average 1.688323090430202) internal successors, (1923), 1140 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-20 23:35:51,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:51,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:51,560 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1161542126, now seen corresponding path program 1 times [2021-11-20 23:35:51,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:51,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705097589] [2021-11-20 23:35:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:51,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:52,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705097589] [2021-11-20 23:35:52,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705097589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:52,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:52,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:52,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347609447] [2021-11-20 23:35:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:52,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:52,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:52,506 INFO L87 Difference]: Start difference. First operand has 1141 states, 1139 states have (on average 1.688323090430202) internal successors, (1923), 1140 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:53,090 INFO L93 Difference]: Finished difference Result 2207 states and 3670 transitions. [2021-11-20 23:35:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:53,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 269 [2021-11-20 23:35:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:53,117 INFO L225 Difference]: With dead ends: 2207 [2021-11-20 23:35:53,118 INFO L226 Difference]: Without dead ends: 1568 [2021-11-20 23:35:53,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:53,128 INFO L933 BasicCegarLoop]: 1828 mSDtfsCounter, 880 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:53,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 3464 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:35:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-11-20 23:35:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1566. [2021-11-20 23:35:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.554632587859425) internal successors, (2433), 1565 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2433 transitions. [2021-11-20 23:35:53,256 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2433 transitions. Word has length 269 [2021-11-20 23:35:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:53,258 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 2433 transitions. [2021-11-20 23:35:53,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2433 transitions. [2021-11-20 23:35:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-20 23:35:53,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:53,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:53,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:35:53,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1532802128, now seen corresponding path program 1 times [2021-11-20 23:35:53,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064222816] [2021-11-20 23:35:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:53,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:53,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:53,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064222816] [2021-11-20 23:35:53,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064222816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:53,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:53,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833506328] [2021-11-20 23:35:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:53,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:53,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:53,545 INFO L87 Difference]: Start difference. First operand 1566 states and 2433 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:53,954 INFO L93 Difference]: Finished difference Result 3345 states and 5144 transitions. [2021-11-20 23:35:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 279 [2021-11-20 23:35:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:53,972 INFO L225 Difference]: With dead ends: 3345 [2021-11-20 23:35:53,972 INFO L226 Difference]: Without dead ends: 2308 [2021-11-20 23:35:53,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:53,981 INFO L933 BasicCegarLoop]: 1798 mSDtfsCounter, 813 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 3272 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:35:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-11-20 23:35:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2306. [2021-11-20 23:35:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 1.5431670281995662) internal successors, (3557), 2305 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3557 transitions. [2021-11-20 23:35:54,091 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3557 transitions. Word has length 279 [2021-11-20 23:35:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:54,096 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 3557 transitions. [2021-11-20 23:35:54,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3557 transitions. [2021-11-20 23:35:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-20 23:35:54,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:54,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:35:54,107 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:54,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:54,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1651676586, now seen corresponding path program 1 times [2021-11-20 23:35:54,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:54,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111830822] [2021-11-20 23:35:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:54,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:54,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:54,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111830822] [2021-11-20 23:35:54,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111830822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:54,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:54,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:54,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93224863] [2021-11-20 23:35:54,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:54,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:54,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:54,408 INFO L87 Difference]: Start difference. First operand 2306 states and 3557 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:54,848 INFO L93 Difference]: Finished difference Result 5313 states and 8127 transitions. [2021-11-20 23:35:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 289 [2021-11-20 23:35:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:54,872 INFO L225 Difference]: With dead ends: 5313 [2021-11-20 23:35:54,872 INFO L226 Difference]: Without dead ends: 3559 [2021-11-20 23:35:54,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:54,884 INFO L933 BasicCegarLoop]: 1761 mSDtfsCounter, 804 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 3200 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:54,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 3200 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:35:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-11-20 23:35:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 3557. [2021-11-20 23:35:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3556 states have (on average 1.531214848143982) internal successors, (5445), 3556 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 5445 transitions. [2021-11-20 23:35:55,082 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 5445 transitions. Word has length 289 [2021-11-20 23:35:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:55,083 INFO L470 AbstractCegarLoop]: Abstraction has 3557 states and 5445 transitions. [2021-11-20 23:35:55,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 5445 transitions. [2021-11-20 23:35:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-20 23:35:55,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:55,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:55,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:35:55,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1598620466, now seen corresponding path program 1 times [2021-11-20 23:35:55,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:55,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319363412] [2021-11-20 23:35:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:55,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:55,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319363412] [2021-11-20 23:35:55,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319363412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:55,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:55,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:55,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028784237] [2021-11-20 23:35:55,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:55,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:55,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:55,286 INFO L87 Difference]: Start difference. First operand 3557 states and 5445 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:55,896 INFO L93 Difference]: Finished difference Result 8584 states and 13046 transitions. [2021-11-20 23:35:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 299 [2021-11-20 23:35:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:55,929 INFO L225 Difference]: With dead ends: 8584 [2021-11-20 23:35:55,929 INFO L226 Difference]: Without dead ends: 5602 [2021-11-20 23:35:55,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:55,943 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 795 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:55,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 3128 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:35:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-11-20 23:35:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5600. [2021-11-20 23:35:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 1.51794963386319) internal successors, (8499), 5599 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 8499 transitions. [2021-11-20 23:35:56,283 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 8499 transitions. Word has length 299 [2021-11-20 23:35:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:56,284 INFO L470 AbstractCegarLoop]: Abstraction has 5600 states and 8499 transitions. [2021-11-20 23:35:56,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 8499 transitions. [2021-11-20 23:35:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-20 23:35:56,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:56,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:56,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:35:56,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1318226536, now seen corresponding path program 1 times [2021-11-20 23:35:56,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:56,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67441447] [2021-11-20 23:35:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:56,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:56,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67441447] [2021-11-20 23:35:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67441447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:56,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:56,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:56,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085654635] [2021-11-20 23:35:56,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:56,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:56,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:56,526 INFO L87 Difference]: Start difference. First operand 5600 states and 8499 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:57,300 INFO L93 Difference]: Finished difference Result 13771 states and 20751 transitions. [2021-11-20 23:35:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:57,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 309 [2021-11-20 23:35:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:57,352 INFO L225 Difference]: With dead ends: 13771 [2021-11-20 23:35:57,353 INFO L226 Difference]: Without dead ends: 8769 [2021-11-20 23:35:57,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:57,365 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 786 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:57,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 3056 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:35:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8769 states. [2021-11-20 23:35:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8769 to 8767. [2021-11-20 23:35:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8767 states, 8766 states have (on average 1.501368925393566) internal successors, (13161), 8766 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8767 states to 8767 states and 13161 transitions. [2021-11-20 23:35:57,986 INFO L78 Accepts]: Start accepts. Automaton has 8767 states and 13161 transitions. Word has length 309 [2021-11-20 23:35:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 8767 states and 13161 transitions. [2021-11-20 23:35:57,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 8767 states and 13161 transitions. [2021-11-20 23:35:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-20 23:35:58,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:58,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:58,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:35:58,008 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash -677522649, now seen corresponding path program 1 times [2021-11-20 23:35:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367380511] [2021-11-20 23:35:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:58,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:03,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367380511] [2021-11-20 23:36:03,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367380511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:03,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:03,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-20 23:36:03,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499671955] [2021-11-20 23:36:03,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:03,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 23:36:03,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 23:36:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:36:03,210 INFO L87 Difference]: Start difference. First operand 8767 states and 13161 transitions. Second operand has 21 states, 21 states have (on average 15.19047619047619) internal successors, (319), 21 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:19,322 INFO L93 Difference]: Finished difference Result 41291 states and 63993 transitions. [2021-11-20 23:36:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 23:36:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 15.19047619047619) internal successors, (319), 21 states have internal predecessors, (319), 0 states have call successors, (0), 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 319 [2021-11-20 23:36:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:19,450 INFO L225 Difference]: With dead ends: 41291 [2021-11-20 23:36:19,450 INFO L226 Difference]: Without dead ends: 38009 [2021-11-20 23:36:19,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 23:36:19,467 INFO L933 BasicCegarLoop]: 11912 mSDtfsCounter, 13775 mSDsluCounter, 66146 mSDsCounter, 0 mSdLazyCounter, 9837 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13775 SdHoareTripleChecker+Valid, 77494 SdHoareTripleChecker+Invalid, 10007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 9837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:19,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13775 Valid, 77494 Invalid, 10007 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [170 Valid, 9837 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2021-11-20 23:36:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38009 states. [2021-11-20 23:36:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38009 to 37941. [2021-11-20 23:36:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37941 states, 37940 states have (on average 1.5303373748023195) internal successors, (58061), 37940 states have internal predecessors, (58061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37941 states to 37941 states and 58061 transitions. [2021-11-20 23:36:22,752 INFO L78 Accepts]: Start accepts. Automaton has 37941 states and 58061 transitions. Word has length 319 [2021-11-20 23:36:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:22,753 INFO L470 AbstractCegarLoop]: Abstraction has 37941 states and 58061 transitions. [2021-11-20 23:36:22,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 15.19047619047619) internal successors, (319), 21 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 37941 states and 58061 transitions. [2021-11-20 23:36:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-20 23:36:22,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:22,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:22,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:36:22,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash -266707265, now seen corresponding path program 1 times [2021-11-20 23:36:22,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:22,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906703517] [2021-11-20 23:36:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:22,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:23,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906703517] [2021-11-20 23:36:23,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906703517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:23,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:23,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 23:36:23,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695399241] [2021-11-20 23:36:23,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:23,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:36:23,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:23,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:36:23,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:36:23,691 INFO L87 Difference]: Start difference. First operand 37941 states and 58061 transitions. Second operand has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:35,234 INFO L93 Difference]: Finished difference Result 170904 states and 262074 transitions. [2021-11-20 23:36:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:36:35,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2021-11-20 23:36:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:35,861 INFO L225 Difference]: With dead ends: 170904 [2021-11-20 23:36:35,861 INFO L226 Difference]: Without dead ends: 133712 [2021-11-20 23:36:35,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:36:35,993 INFO L933 BasicCegarLoop]: 1979 mSDtfsCounter, 14550 mSDsluCounter, 7576 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14550 SdHoareTripleChecker+Valid, 9305 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:35,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14550 Valid, 9305 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:36:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133712 states. [2021-11-20 23:36:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133712 to 129107. [2021-11-20 23:36:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129107 states, 129106 states have (on average 1.5163818877511501) internal successors, (195774), 129106 states have internal predecessors, (195774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129107 states to 129107 states and 195774 transitions. [2021-11-20 23:36:48,373 INFO L78 Accepts]: Start accepts. Automaton has 129107 states and 195774 transitions. Word has length 320 [2021-11-20 23:36:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:48,374 INFO L470 AbstractCegarLoop]: Abstraction has 129107 states and 195774 transitions. [2021-11-20 23:36:48,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 129107 states and 195774 transitions. [2021-11-20 23:36:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-20 23:36:48,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:48,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:48,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:36:48,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -411774226, now seen corresponding path program 1 times [2021-11-20 23:36:48,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:48,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993161649] [2021-11-20 23:36:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:48,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:49,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993161649] [2021-11-20 23:36:49,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993161649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:49,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:49,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 23:36:49,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985294239] [2021-11-20 23:36:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:49,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:36:49,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:36:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:36:49,287 INFO L87 Difference]: Start difference. First operand 129107 states and 195774 transitions. Second operand has 10 states, 10 states have (on average 32.1) internal successors, (321), 10 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)