./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/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_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/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 64bit --witnessprinter.graph.data.programhash d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:45:16,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:45:16,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:45:17,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:45:17,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:45:17,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:45:17,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:45:17,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:45:17,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:45:17,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:45:17,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:45:17,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:45:17,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:45:17,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:45:17,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:45:17,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:45:17,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:45:17,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:45:17,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:45:17,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:45:17,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:45:17,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:45:17,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:45:17,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:45:17,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:45:17,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:45:17,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:45:17,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:45:17,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:45:17,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:45:17,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:45:17,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:45:17,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:45:17,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:45:17,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:45:17,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:45:17,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:45:17,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:45:17,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:45:17,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:45:17,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:45:17,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:45:17,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:45:17,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:45:17,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:45:17,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:45:17,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:45:17,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:45:17,127 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:45:17,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:45:17,128 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:45:17,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:45:17,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:45:17,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:45:17,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:45:17,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:45:17,129 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:45:17,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:45:17,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:45:17,130 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:45:17,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:45:17,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:45:17,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:45:17,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:45:17,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:45:17,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:45:17,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:45:17,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:45:17,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:45:17,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:45:17,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:45:17,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:45:17,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:45:17,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:45:17,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:45:17,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:45:17,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:45:17,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:45:17,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:45:17,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:45:17,137 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_d9e9c0f5-28c5-47fc-9146-0730b012967d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2021-11-21 00:45:17,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:45:17,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:45:17,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:45:17,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:45:17,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:45:17,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-21 00:45:17,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/data/833668044/87c714eab1e4401ea7cf7aae48a4ecca/FLAGebaa80cbf [2021-11-21 00:45:18,654 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:45:18,656 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-21 00:45:18,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/data/833668044/87c714eab1e4401ea7cf7aae48a4ecca/FLAGebaa80cbf [2021-11-21 00:45:19,113 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/data/833668044/87c714eab1e4401ea7cf7aae48a4ecca [2021-11-21 00:45:19,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:45:19,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:45:19,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:45:19,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:45:19,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:45:19,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:45:19" (1/1) ... [2021-11-21 00:45:19,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a0b3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:19, skipping insertion in model container [2021-11-21 00:45:19,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:45:19" (1/1) ... [2021-11-21 00:45:19,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:45:19,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:45:20,496 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_d9e9c0f5-28c5-47fc-9146-0730b012967d/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-21 00:45:20,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:45:20,675 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:45:20,961 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_d9e9c0f5-28c5-47fc-9146-0730b012967d/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-21 00:45:20,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:45:21,147 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:45:21,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21 WrapperNode [2021-11-21 00:45:21,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:45:21,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:45:21,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:45:21,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:45:21,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,558 INFO L137 Inliner]: procedures = 106, calls = 3465, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 4255 [2021-11-21 00:45:21,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:45:21,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:45:21,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:45:21,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:45:21,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:21,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:22,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:22,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:45:22,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:45:22,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:45:22,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:45:22,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (1/1) ... [2021-11-21 00:45:22,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:45:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:22,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:45:22,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:45:22,183 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2021-11-21 00:45:22,184 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2021-11-21 00:45:22,184 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2021-11-21 00:45:22,184 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2021-11-21 00:45:22,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:45:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-21 00:45:22,185 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-21 00:45:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2021-11-21 00:45:22,185 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2021-11-21 00:45:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:45:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:45:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2021-11-21 00:45:22,186 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2021-11-21 00:45:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:45:22,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:45:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:45:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:45:22,188 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:45:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2021-11-21 00:45:22,189 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2021-11-21 00:45:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:45:22,189 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:45:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:45:22,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:45:22,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2021-11-21 00:45:22,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2021-11-21 00:45:22,190 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-21 00:45:22,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-21 00:45:22,191 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2021-11-21 00:45:22,191 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2021-11-21 00:45:22,191 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 00:45:22,191 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 00:45:22,192 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2021-11-21 00:45:22,192 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2021-11-21 00:45:22,192 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2021-11-21 00:45:22,192 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2021-11-21 00:45:22,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:45:22,193 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2021-11-21 00:45:22,194 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2021-11-21 00:45:22,194 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2021-11-21 00:45:22,194 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2021-11-21 00:45:22,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:45:22,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:45:22,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 00:45:22,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 00:45:22,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:45:22,196 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:45:22,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:45:22,197 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2021-11-21 00:45:22,197 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2021-11-21 00:45:22,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 00:45:22,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 00:45:22,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:45:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2021-11-21 00:45:22,200 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2021-11-21 00:45:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2021-11-21 00:45:22,200 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2021-11-21 00:45:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 00:45:22,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 00:45:22,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:45:22,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:45:22,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:45:22,203 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2021-11-21 00:45:22,203 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2021-11-21 00:45:22,203 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2021-11-21 00:45:22,203 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2021-11-21 00:45:22,203 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2021-11-21 00:45:22,204 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2021-11-21 00:45:22,204 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2021-11-21 00:45:22,204 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2021-11-21 00:45:22,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:45:22,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:45:22,205 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-21 00:45:22,206 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-21 00:45:22,206 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2021-11-21 00:45:22,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2021-11-21 00:45:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2021-11-21 00:45:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2021-11-21 00:45:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-21 00:45:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-21 00:45:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-21 00:45:22,208 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-21 00:45:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2021-11-21 00:45:22,209 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2021-11-21 00:45:22,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:45:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2021-11-21 00:45:22,210 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2021-11-21 00:45:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-21 00:45:22,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-21 00:45:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:45:22,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:45:22,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:45:22,212 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2021-11-21 00:45:22,212 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2021-11-21 00:45:22,774 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:45:22,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:45:23,640 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:45:29,988 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:45:30,732 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:45:30,733 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:45:30,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:45:30 BoogieIcfgContainer [2021-11-21 00:45:30,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:45:30,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:45:30,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:45:30,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:45:30,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:45:19" (1/3) ... [2021-11-21 00:45:30,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d2bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:45:30, skipping insertion in model container [2021-11-21 00:45:30,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:21" (2/3) ... [2021-11-21 00:45:30,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d2bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:45:30, skipping insertion in model container [2021-11-21 00:45:30,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:45:30" (3/3) ... [2021-11-21 00:45:30,757 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-21 00:45:30,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:45:30,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:45:30,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:45:30,866 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 [2021-11-21 00:45:30,867 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:45:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 662 states, 417 states have (on average 1.3860911270983214) internal successors, (578), 433 states have internal predecessors, (578), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) [2021-11-21 00:45:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-21 00:45:30,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:30,955 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:30,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391153, now seen corresponding path program 1 times [2021-11-21 00:45:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:30,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018186178] [2021-11-21 00:45:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:30,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-21 00:45:32,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:32,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018186178] [2021-11-21 00:45:32,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018186178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:32,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:32,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:45:32,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208499604] [2021-11-21 00:45:32,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:32,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:45:32,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:45:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:45:32,664 INFO L87 Difference]: Start difference. First operand has 662 states, 417 states have (on average 1.3860911270983214) internal successors, (578), 433 states have internal predecessors, (578), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-21 00:45:34,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:37,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:37,931 INFO L93 Difference]: Finished difference Result 1352 states and 2027 transitions. [2021-11-21 00:45:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:45:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 262 [2021-11-21 00:45:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:37,965 INFO L225 Difference]: With dead ends: 1352 [2021-11-21 00:45:37,965 INFO L226 Difference]: Without dead ends: 757 [2021-11-21 00:45:37,978 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 [2021-11-21 00:45:37,986 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 178 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:37,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1755 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 00:45:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-21 00:45:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 745. [2021-11-21 00:45:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 466 states have (on average 1.3690987124463518) internal successors, (638), 484 states have internal predecessors, (638), 231 states have call successors, (231), 47 states have call predecessors, (231), 47 states have return successors, (231), 225 states have call predecessors, (231), 231 states have call successors, (231) [2021-11-21 00:45:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1100 transitions. [2021-11-21 00:45:38,225 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1100 transitions. Word has length 262 [2021-11-21 00:45:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:38,229 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1100 transitions. [2021-11-21 00:45:38,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-21 00:45:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1100 transitions. [2021-11-21 00:45:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-21 00:45:38,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:38,243 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:38,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:45:38,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash -426608264, now seen corresponding path program 1 times [2021-11-21 00:45:38,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:38,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084555316] [2021-11-21 00:45:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:38,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-21 00:45:39,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084555316] [2021-11-21 00:45:39,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084555316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:39,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:39,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:45:39,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196229194] [2021-11-21 00:45:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:39,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:45:39,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:45:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:45:39,042 INFO L87 Difference]: Start difference. First operand 745 states and 1100 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-21 00:45:40,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:42,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:43,344 INFO L93 Difference]: Finished difference Result 2022 states and 2991 transitions. [2021-11-21 00:45:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:45:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 273 [2021-11-21 00:45:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:43,498 INFO L225 Difference]: With dead ends: 2022 [2021-11-21 00:45:43,498 INFO L226 Difference]: Without dead ends: 1375 [2021-11-21 00:45:43,504 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 [2021-11-21 00:45:43,507 INFO L933 BasicCegarLoop]: 1075 mSDtfsCounter, 833 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:43,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 1805 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 00:45:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-11-21 00:45:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1373. [2021-11-21 00:45:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 869 states have (on average 1.386651323360184) internal successors, (1205), 905 states have internal predecessors, (1205), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2021-11-21 00:45:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2029 transitions. [2021-11-21 00:45:43,650 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2029 transitions. Word has length 273 [2021-11-21 00:45:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:43,653 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2029 transitions. [2021-11-21 00:45:43,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-21 00:45:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2029 transitions. [2021-11-21 00:45:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-21 00:45:43,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:43,664 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:43,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:45:43,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:43,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1520780228, now seen corresponding path program 1 times [2021-11-21 00:45:43,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:43,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329916885] [2021-11-21 00:45:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:43,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-21 00:45:44,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329916885] [2021-11-21 00:45:44,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329916885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:44,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:45:44,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117217510] [2021-11-21 00:45:44,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:44,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:45:44,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:45:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:45:44,448 INFO L87 Difference]: Start difference. First operand 1373 states and 2029 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-21 00:45:46,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:48,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:49,434 INFO L93 Difference]: Finished difference Result 2652 states and 3921 transitions. [2021-11-21 00:45:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:45:49,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 275 [2021-11-21 00:45:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:49,453 INFO L225 Difference]: With dead ends: 2652 [2021-11-21 00:45:49,454 INFO L226 Difference]: Without dead ends: 1373 [2021-11-21 00:45:49,463 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 [2021-11-21 00:45:49,467 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 1 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:49,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2603 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 00:45:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-11-21 00:45:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1373. [2021-11-21 00:45:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 869 states have (on average 1.384349827387802) internal successors, (1203), 905 states have internal predecessors, (1203), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2021-11-21 00:45:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2027 transitions. [2021-11-21 00:45:49,574 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2027 transitions. Word has length 275 [2021-11-21 00:45:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:49,575 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2027 transitions. [2021-11-21 00:45:49,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-21 00:45:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2027 transitions. [2021-11-21 00:45:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-21 00:45:49,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:49,581 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:49,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:45:49,582 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 56011632, now seen corresponding path program 1 times [2021-11-21 00:45:49,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:49,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259866020] [2021-11-21 00:45:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:49,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-21 00:45:50,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259866020] [2021-11-21 00:45:50,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259866020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:50,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:50,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:45:50,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060552013] [2021-11-21 00:45:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:50,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:45:50,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:45:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:45:50,121 INFO L87 Difference]: Start difference. First operand 1373 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-21 00:45:52,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:54,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:55,071 INFO L93 Difference]: Finished difference Result 2652 states and 3917 transitions. [2021-11-21 00:45:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:45:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 278 [2021-11-21 00:45:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:55,091 INFO L225 Difference]: With dead ends: 2652 [2021-11-21 00:45:55,091 INFO L226 Difference]: Without dead ends: 1361 [2021-11-21 00:45:55,100 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 [2021-11-21 00:45:55,102 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 1 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:55,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2594 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 00:45:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-11-21 00:45:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1361. [2021-11-21 00:45:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 865 states have (on average 1.3676300578034681) internal successors, (1183), 897 states have internal predecessors, (1183), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-21 00:45:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1995 transitions. [2021-11-21 00:45:55,193 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1995 transitions. Word has length 278 [2021-11-21 00:45:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:55,194 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1995 transitions. [2021-11-21 00:45:55,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-21 00:45:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1995 transitions. [2021-11-21 00:45:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-21 00:45:55,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:55,203 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:45:55,204 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1633255471, now seen corresponding path program 1 times [2021-11-21 00:45:55,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:55,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609424654] [2021-11-21 00:45:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:55,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2388 trivial. 0 not checked. [2021-11-21 00:45:55,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609424654] [2021-11-21 00:45:55,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609424654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061065218] [2021-11-21 00:45:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:55,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:55,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:55,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:55,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:45:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:57,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 8255 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:45:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2021-11-21 00:45:58,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:45:58,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061065218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:58,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:45:58,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-21 00:45:58,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109546884] [2021-11-21 00:45:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:58,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:45:58,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:45:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:45:58,064 INFO L87 Difference]: Start difference. First operand 1361 states and 1995 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-21 00:45:59,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:01,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:03,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:03,857 INFO L93 Difference]: Finished difference Result 2648 states and 4067 transitions. [2021-11-21 00:46:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:46:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 376 [2021-11-21 00:46:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:03,871 INFO L225 Difference]: With dead ends: 2648 [2021-11-21 00:46:03,871 INFO L226 Difference]: Without dead ends: 1385 [2021-11-21 00:46:03,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:46:03,884 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 2 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:03,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1707 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:46:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-11-21 00:46:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1369. [2021-11-21 00:46:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 873 states have (on average 1.3642611683848798) internal successors, (1191), 905 states have internal predecessors, (1191), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-21 00:46:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2003 transitions. [2021-11-21 00:46:03,994 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2003 transitions. Word has length 376 [2021-11-21 00:46:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:03,996 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2003 transitions. [2021-11-21 00:46:03,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-21 00:46:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2003 transitions. [2021-11-21 00:46:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-21 00:46:04,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:04,076 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:04,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:04,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:04,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1489186375, now seen corresponding path program 1 times [2021-11-21 00:46:04,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949167107] [2021-11-21 00:46:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:04,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2467 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2465 trivial. 0 not checked. [2021-11-21 00:46:04,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:04,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949167107] [2021-11-21 00:46:04,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949167107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:04,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:46:04,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594263734] [2021-11-21 00:46:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:04,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:46:04,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:46:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:46:04,844 INFO L87 Difference]: Start difference. First operand 1369 states and 2003 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-21 00:46:06,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:09,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:09,573 INFO L93 Difference]: Finished difference Result 2652 states and 3885 transitions. [2021-11-21 00:46:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:46:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 392 [2021-11-21 00:46:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:09,592 INFO L225 Difference]: With dead ends: 2652 [2021-11-21 00:46:09,592 INFO L226 Difference]: Without dead ends: 1381 [2021-11-21 00:46:09,603 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 [2021-11-21 00:46:09,604 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 1 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:09,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1712 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 00:46:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-11-21 00:46:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1373. [2021-11-21 00:46:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 877 states have (on average 1.362599771949829) internal successors, (1195), 909 states have internal predecessors, (1195), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-21 00:46:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2007 transitions. [2021-11-21 00:46:09,701 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2007 transitions. Word has length 392 [2021-11-21 00:46:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:09,703 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2007 transitions. [2021-11-21 00:46:09,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-21 00:46:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2007 transitions. [2021-11-21 00:46:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-21 00:46:09,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:09,714 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:09,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:46:09,714 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1524522285, now seen corresponding path program 1 times [2021-11-21 00:46:09,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:09,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867051561] [2021-11-21 00:46:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:09,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2021-11-21 00:46:10,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867051561] [2021-11-21 00:46:10,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867051561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34260863] [2021-11-21 00:46:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:10,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:10,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:10,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e9c0f5-28c5-47fc-9146-0730b012967d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:46:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 8340 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 164 proven. 1 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-11-21 00:46:12,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2021-11-21 00:46:13,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34260863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732640367] [2021-11-21 00:46:13,631 INFO L159 IcfgInterpreter]: Started Sifa with 184 locations of interest [2021-11-21 00:46:13,632 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:13,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:13,644 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:13,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:49:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:47,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:48,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:48,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:49,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:50,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:50,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:53,579 INFO L244 Elim1Store]: Index analysis took 6449 ms