./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.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_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/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_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/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_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/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 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:49:14,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:49:14,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:49:14,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:49:14,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:49:14,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:49:14,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:49:14,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:49:14,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:49:14,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:49:14,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:49:14,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:49:14,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:49:14,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:49:14,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:49:14,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:49:14,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:49:14,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:49:14,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:49:14,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:49:14,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:49:14,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:49:14,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:49:14,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:49:14,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:49:14,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:49:14,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:49:14,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:49:14,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:49:14,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:49:14,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:49:14,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:49:14,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:49:14,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:49:14,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:49:14,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:49:14,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:49:14,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:49:14,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:49:14,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:49:14,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:49:14,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:49:14,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:49:14,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:49:14,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:49:14,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:49:14,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:49:14,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:49:14,201 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:49:14,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:49:14,202 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:49:14,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:49:14,202 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:49:14,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:49:14,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:49:14,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:49:14,203 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:49:14,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:49:14,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:49:14,203 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:49:14,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:49:14,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:49:14,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:49:14,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:49:14,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:49:14,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:49:14,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:49:14,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:49:14,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:49:14,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:49:14,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:49:14,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:14,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:49:14,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:49:14,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:49:14,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:49:14,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:49:14,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:49:14,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:49:14,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:49:14,208 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_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 [2021-11-21 00:49:14,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:49:14,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:49:14,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:49:14,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:49:14,532 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:49:14,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-21 00:49:14,606 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/data/0ce2ef175/6beff34e371340428e51ade3d6d4209b/FLAGdbb729b0a [2021-11-21 00:49:15,524 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:49:15,524 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-21 00:49:15,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/data/0ce2ef175/6beff34e371340428e51ade3d6d4209b/FLAGdbb729b0a [2021-11-21 00:49:15,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/data/0ce2ef175/6beff34e371340428e51ade3d6d4209b [2021-11-21 00:49:15,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:49:15,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:49:15,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:15,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:49:15,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:49:15,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:15" (1/1) ... [2021-11-21 00:49:15,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b79042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:15, skipping insertion in model container [2021-11-21 00:49:15,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:15" (1/1) ... [2021-11-21 00:49:15,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:49:16,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:49:17,910 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_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-21 00:49:17,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:18,023 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:49:18,429 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_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-21 00:49:18,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:18,639 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:49:18,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18 WrapperNode [2021-11-21 00:49:18,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:18,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:18,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:49:18,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:49:18,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:18,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:18,983 INFO L137 Inliner]: procedures = 226, calls = 1428, calls flagged for inlining = 121, calls inlined = 118, statements flattened = 3761 [2021-11-21 00:49:18,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:18,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:49:18,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:49:18,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:49:19,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:49:19,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:49:19,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:49:19,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:49:19,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (1/1) ... [2021-11-21 00:49:19,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:19,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:49:19,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:49:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_drvinfo [2021-11-21 00:49:19,353 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_drvinfo [2021-11-21 00:49:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-21 00:49:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-21 00:49:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:49:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:49:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-21 00:49:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-21 00:49:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:49:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:49:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:49:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:49:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-21 00:49:19,355 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-21 00:49:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 00:49:19,355 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 00:49:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-21 00:49:19,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-21 00:49:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:49:19,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:49:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-21 00:49:19,355 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-21 00:49:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 00:49:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 00:49:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-21 00:49:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-21 00:49:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-21 00:49:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-21 00:49:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:49:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:49:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:49:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:49:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 00:49:19,357 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 00:49:19,357 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-21 00:49:19,357 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-21 00:49:19,357 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-21 00:49:19,357 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-21 00:49:19,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:49:19,357 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 00:49:19,357 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 00:49:19,357 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-21 00:49:19,358 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-21 00:49:19,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:49:19,358 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 00:49:19,358 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 00:49:19,358 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-21 00:49:19,358 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-21 00:49:19,358 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 00:49:19,359 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 00:49:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-21 00:49:19,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-21 00:49:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-21 00:49:19,359 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-21 00:49:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:49:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-21 00:49:19,359 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-21 00:49:19,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:49:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-21 00:49:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-21 00:49:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-21 00:49:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-21 00:49:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 00:49:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 00:49:19,360 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 00:49:19,360 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 00:49:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:49:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-21 00:49:19,361 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-21 00:49:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:49:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-21 00:49:19,361 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-21 00:49:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:49:19,361 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-21 00:49:19,362 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-21 00:49:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 00:49:19,362 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 00:49:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-21 00:49:19,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-21 00:49:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_ioctl [2021-11-21 00:49:19,362 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_ioctl [2021-11-21 00:49:19,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-21 00:49:19,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-21 00:49:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-21 00:49:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-21 00:49:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:49:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-21 00:49:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-21 00:49:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:49:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:49:19,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 00:49:19,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 00:49:19,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:49:19,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 00:49:19,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 00:49:19,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:49:19,364 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 00:49:19,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 00:49:19,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:49:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-21 00:49:19,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-21 00:49:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2021-11-21 00:49:19,365 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2021-11-21 00:49:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-21 00:49:19,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-21 00:49:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-21 00:49:19,365 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-21 00:49:19,366 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2021-11-21 00:49:19,366 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2021-11-21 00:49:19,366 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-21 00:49:19,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-21 00:49:19,366 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-21 00:49:19,366 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-21 00:49:19,366 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-21 00:49:19,366 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-21 00:49:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-21 00:49:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-21 00:49:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-21 00:49:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-21 00:49:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:49:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-21 00:49:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-21 00:49:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-21 00:49:19,367 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-21 00:49:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-21 00:49:19,368 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-21 00:49:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-21 00:49:19,368 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-21 00:49:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:49:19,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:49:20,211 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:49:20,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:49:21,012 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:49:22,942 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:49:23,792 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:49:23,792 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:49:23,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:23 BoogieIcfgContainer [2021-11-21 00:49:23,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:49:23,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:49:23,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:49:23,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:49:23,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:49:15" (1/3) ... [2021-11-21 00:49:23,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d38f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:23, skipping insertion in model container [2021-11-21 00:49:23,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:18" (2/3) ... [2021-11-21 00:49:23,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d38f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:23, skipping insertion in model container [2021-11-21 00:49:23,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:23" (3/3) ... [2021-11-21 00:49:23,807 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-21 00:49:23,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:49:23,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:49:23,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:49:23,878 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 00:49:23,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:49:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 537 states have (on average 1.366852886405959) internal successors, (734), 565 states have internal predecessors, (734), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) [2021-11-21 00:49:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 00:49:23,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:23,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:23,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 590748891, now seen corresponding path program 1 times [2021-11-21 00:49:23,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:23,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879931227] [2021-11-21 00:49:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:23,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:24,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879931227] [2021-11-21 00:49:24,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879931227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:24,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:24,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:49:24,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913599895] [2021-11-21 00:49:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:24,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:49:24,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:49:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:24,734 INFO L87 Difference]: Start difference. First operand has 880 states, 537 states have (on average 1.366852886405959) internal successors, (734), 565 states have internal predecessors, (734), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-21 00:49:27,284 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 00:49:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:28,270 INFO L93 Difference]: Finished difference Result 2235 states and 3276 transitions. [2021-11-21 00:49:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:49:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-21 00:49:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:28,305 INFO L225 Difference]: With dead ends: 2235 [2021-11-21 00:49:28,305 INFO L226 Difference]: Without dead ends: 1347 [2021-11-21 00:49:28,320 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 00:49:28,323 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 720 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:28,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2323 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 353 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 00:49:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-11-21 00:49:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1342. [2021-11-21 00:49:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 836 states have (on average 1.332535885167464) internal successors, (1114), 863 states have internal predecessors, (1114), 407 states have call successors, (407), 99 states have call predecessors, (407), 98 states have return successors, (406), 392 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-21 00:49:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1927 transitions. [2021-11-21 00:49:28,567 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1927 transitions. Word has length 120 [2021-11-21 00:49:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1927 transitions. [2021-11-21 00:49:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-21 00:49:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1927 transitions. [2021-11-21 00:49:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 00:49:28,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:28,575 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:28,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:49:28,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1779453808, now seen corresponding path program 1 times [2021-11-21 00:49:28,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:28,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438799812] [2021-11-21 00:49:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:28,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:28,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438799812] [2021-11-21 00:49:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438799812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:28,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:28,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647120551] [2021-11-21 00:49:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:28,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:28,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:28,863 INFO L87 Difference]: Start difference. First operand 1342 states and 1927 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:31,663 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 00:49:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:32,803 INFO L93 Difference]: Finished difference Result 3159 states and 4515 transitions. [2021-11-21 00:49:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:49:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-21 00:49:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:32,823 INFO L225 Difference]: With dead ends: 3159 [2021-11-21 00:49:32,823 INFO L226 Difference]: Without dead ends: 1841 [2021-11-21 00:49:32,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:32,832 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 685 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:32,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 4845 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 00:49:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-21 00:49:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1829. [2021-11-21 00:49:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1147 states have (on average 1.3251961639058414) internal successors, (1520), 1182 states have internal predecessors, (1520), 540 states have call successors, (540), 142 states have call predecessors, (540), 141 states have return successors, (539), 523 states have call predecessors, (539), 539 states have call successors, (539) [2021-11-21 00:49:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2599 transitions. [2021-11-21 00:49:32,943 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2599 transitions. Word has length 134 [2021-11-21 00:49:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:32,944 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2599 transitions. [2021-11-21 00:49:32,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2599 transitions. [2021-11-21 00:49:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 00:49:32,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:32,992 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:32,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:49:32,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 464061107, now seen corresponding path program 1 times [2021-11-21 00:49:32,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:32,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62945339] [2021-11-21 00:49:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:32,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:33,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:33,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62945339] [2021-11-21 00:49:33,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62945339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:33,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:33,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:33,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984041778] [2021-11-21 00:49:33,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:33,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:33,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:33,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:33,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:33,288 INFO L87 Difference]: Start difference. First operand 1829 states and 2599 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:36,219 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 00:49:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:36,968 INFO L93 Difference]: Finished difference Result 4141 states and 5867 transitions. [2021-11-21 00:49:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:49:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 132 [2021-11-21 00:49:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:36,989 INFO L225 Difference]: With dead ends: 4141 [2021-11-21 00:49:36,989 INFO L226 Difference]: Without dead ends: 2336 [2021-11-21 00:49:36,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:37,000 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 689 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 4862 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:37,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 4862 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 600 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 00:49:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-11-21 00:49:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2311. [2021-11-21 00:49:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1454 states have (on average 1.3218707015130673) internal successors, (1922), 1500 states have internal predecessors, (1922), 672 states have call successors, (672), 185 states have call predecessors, (672), 184 states have return successors, (671), 650 states have call predecessors, (671), 671 states have call successors, (671) [2021-11-21 00:49:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3265 transitions. [2021-11-21 00:49:37,134 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3265 transitions. Word has length 132 [2021-11-21 00:49:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:37,135 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 3265 transitions. [2021-11-21 00:49:37,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3265 transitions. [2021-11-21 00:49:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 00:49:37,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:37,140 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:37,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:49:37,141 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash 763678798, now seen corresponding path program 1 times [2021-11-21 00:49:37,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:37,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543523064] [2021-11-21 00:49:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:37,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:37,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543523064] [2021-11-21 00:49:37,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543523064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:37,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:37,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:37,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615783637] [2021-11-21 00:49:37,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:37,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:37,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:37,432 INFO L87 Difference]: Start difference. First operand 2311 states and 3265 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:40,178 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 00:49:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:41,328 INFO L93 Difference]: Finished difference Result 4380 states and 6179 transitions. [2021-11-21 00:49:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:49:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2021-11-21 00:49:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:41,348 INFO L225 Difference]: With dead ends: 4380 [2021-11-21 00:49:41,348 INFO L226 Difference]: Without dead ends: 2336 [2021-11-21 00:49:41,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:41,360 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 685 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:41,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 4845 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 00:49:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-11-21 00:49:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2315. [2021-11-21 00:49:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1458 states have (on average 1.3209876543209877) internal successors, (1926), 1503 states have internal predecessors, (1926), 671 states have call successors, (671), 186 states have call predecessors, (671), 185 states have return successors, (670), 650 states have call predecessors, (670), 670 states have call successors, (670) [2021-11-21 00:49:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3267 transitions. [2021-11-21 00:49:41,496 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3267 transitions. Word has length 133 [2021-11-21 00:49:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:41,497 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3267 transitions. [2021-11-21 00:49:41,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3267 transitions. [2021-11-21 00:49:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-21 00:49:41,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:41,506 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:41,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:49:41,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash -773698069, now seen corresponding path program 1 times [2021-11-21 00:49:41,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:41,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557742774] [2021-11-21 00:49:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:41,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:41,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:41,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557742774] [2021-11-21 00:49:41,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557742774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:41,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:41,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:41,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273169533] [2021-11-21 00:49:41,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:41,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:41,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:41,817 INFO L87 Difference]: Start difference. First operand 2315 states and 3267 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:44,567 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 00:49:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:45,639 INFO L93 Difference]: Finished difference Result 4165 states and 5878 transitions. [2021-11-21 00:49:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:49:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 135 [2021-11-21 00:49:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:45,657 INFO L225 Difference]: With dead ends: 4165 [2021-11-21 00:49:45,658 INFO L226 Difference]: Without dead ends: 2116 [2021-11-21 00:49:45,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:45,670 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 682 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:45,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 4845 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-21 00:49:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-21 00:49:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2098. [2021-11-21 00:49:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1324 states have (on average 1.3270392749244713) internal successors, (1757), 1364 states have internal predecessors, (1757), 605 states have call successors, (605), 169 states have call predecessors, (605), 168 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2021-11-21 00:49:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2966 transitions. [2021-11-21 00:49:45,822 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2966 transitions. Word has length 135 [2021-11-21 00:49:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:45,824 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2966 transitions. [2021-11-21 00:49:45,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:49:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2966 transitions. [2021-11-21 00:49:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 00:49:45,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:45,832 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:49:45,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash -565687776, now seen corresponding path program 1 times [2021-11-21 00:49:45,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:45,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718052713] [2021-11-21 00:49:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:45,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-21 00:49:46,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718052713] [2021-11-21 00:49:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718052713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:49:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013076583] [2021-11-21 00:49:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:46,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:46,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:49:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:46,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:49:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:47,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:49:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013076583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:47,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:49:47,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-21 00:49:47,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826704295] [2021-11-21 00:49:47,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:49:47,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:49:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:49:47,402 INFO L87 Difference]: Start difference. First operand 2098 states and 2966 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:49:50,777 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 00:49:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:52,599 INFO L93 Difference]: Finished difference Result 5433 states and 7683 transitions. [2021-11-21 00:49:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:49:52,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 146 [2021-11-21 00:49:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:52,627 INFO L225 Difference]: With dead ends: 5433 [2021-11-21 00:49:52,628 INFO L226 Difference]: Without dead ends: 3618 [2021-11-21 00:49:52,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:49:52,639 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 1091 mSDsluCounter, 9033 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 9809 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:52,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 9809 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1237 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-21 00:49:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-21 00:49:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3578. [2021-11-21 00:49:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 2275 states have (on average 1.3314285714285714) internal successors, (3029), 2351 states have internal predecessors, (3029), 1011 states have call successors, (1011), 289 states have call predecessors, (1011), 291 states have return successors, (1019), 976 states have call predecessors, (1019), 1010 states have call successors, (1019) [2021-11-21 00:49:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 5059 transitions. [2021-11-21 00:49:52,857 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 5059 transitions. Word has length 146 [2021-11-21 00:49:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 3578 states and 5059 transitions. [2021-11-21 00:49:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:49:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 5059 transitions. [2021-11-21 00:49:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 00:49:52,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:52,863 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:52,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:53,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:49:53,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash -76183936, now seen corresponding path program 1 times [2021-11-21 00:49:53,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:53,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010193222] [2021-11-21 00:49:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:53,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:53,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010193222] [2021-11-21 00:49:53,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010193222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:49:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66346491] [2021-11-21 00:49:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:53,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:53,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:49:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:49:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:49:54,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:49:54,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66346491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:54,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:49:54,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 00:49:54,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708897319] [2021-11-21 00:49:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:54,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:49:54,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:49:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:49:54,617 INFO L87 Difference]: Start difference. First operand 3578 states and 5059 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:49:57,858 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 00:49:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:59,705 INFO L93 Difference]: Finished difference Result 8412 states and 11886 transitions. [2021-11-21 00:49:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:49:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 147 [2021-11-21 00:49:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:59,744 INFO L225 Difference]: With dead ends: 8412 [2021-11-21 00:49:59,744 INFO L226 Difference]: Without dead ends: 5117 [2021-11-21 00:49:59,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:49:59,759 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 1091 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:59,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 10047 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1284 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 00:49:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-11-21 00:50:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 5069. [2021-11-21 00:50:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 3233 states have (on average 1.3325085060315496) internal successors, (4308), 3350 states have internal predecessors, (4308), 1417 states have call successors, (1417), 409 states have call predecessors, (1417), 418 states have return successors, (1440), 1364 states have call predecessors, (1440), 1416 states have call successors, (1440) [2021-11-21 00:50:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 7165 transitions. [2021-11-21 00:50:00,081 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 7165 transitions. Word has length 147 [2021-11-21 00:50:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:00,083 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 7165 transitions. [2021-11-21 00:50:00,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:50:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 7165 transitions. [2021-11-21 00:50:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 00:50:00,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:00,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:00,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:00,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:00,305 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2084420647, now seen corresponding path program 1 times [2021-11-21 00:50:00,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:00,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624947608] [2021-11-21 00:50:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:00,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:50:00,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624947608] [2021-11-21 00:50:00,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624947608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974976396] [2021-11-21 00:50:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:00,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:00,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:00,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:50:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:50:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:50:01,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:50:01,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974976396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:01,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:50:01,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 00:50:01,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136357542] [2021-11-21 00:50:01,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:01,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:50:01,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:50:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:50:01,755 INFO L87 Difference]: Start difference. First operand 5069 states and 7165 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:50:04,908 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 00:50:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:06,762 INFO L93 Difference]: Finished difference Result 11390 states and 16090 transitions. [2021-11-21 00:50:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:50:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 148 [2021-11-21 00:50:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:06,809 INFO L225 Difference]: With dead ends: 11390 [2021-11-21 00:50:06,810 INFO L226 Difference]: Without dead ends: 6604 [2021-11-21 00:50:06,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:50:06,831 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 1091 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:06,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 10047 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1284 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 00:50:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-11-21 00:50:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 5071. [2021-11-21 00:50:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3235 states have (on average 1.3323029366306027) internal successors, (4310), 3350 states have internal predecessors, (4310), 1417 states have call successors, (1417), 409 states have call predecessors, (1417), 418 states have return successors, (1440), 1366 states have call predecessors, (1440), 1416 states have call successors, (1440) [2021-11-21 00:50:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 7167 transitions. [2021-11-21 00:50:07,109 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 7167 transitions. Word has length 148 [2021-11-21 00:50:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:07,110 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 7167 transitions. [2021-11-21 00:50:07,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:50:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 7167 transitions. [2021-11-21 00:50:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-21 00:50:07,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:07,116 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:07,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:07,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:07,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash 214573415, now seen corresponding path program 1 times [2021-11-21 00:50:07,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:07,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972904457] [2021-11-21 00:50:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:07,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:50:07,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972904457] [2021-11-21 00:50:07,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972904457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:07,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335238346] [2021-11-21 00:50:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:07,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:07,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:07,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:50:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:08,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:50:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-21 00:50:08,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:50:08,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335238346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:08,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:50:08,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-21 00:50:08,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753240807] [2021-11-21 00:50:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:50:08,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:50:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:50:08,778 INFO L87 Difference]: Start difference. First operand 5071 states and 7167 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:50:12,031 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 00:50:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:13,821 INFO L93 Difference]: Finished difference Result 11396 states and 16096 transitions. [2021-11-21 00:50:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:50:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 149 [2021-11-21 00:50:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:13,864 INFO L225 Difference]: With dead ends: 11396 [2021-11-21 00:50:13,864 INFO L226 Difference]: Without dead ends: 6608 [2021-11-21 00:50:13,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:50:13,886 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 1091 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:13,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 10047 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1284 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-21 00:50:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-11-21 00:50:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 5073. [2021-11-21 00:50:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 3237 states have (on average 1.3320976212542477) internal successors, (4312), 3350 states have internal predecessors, (4312), 1417 states have call successors, (1417), 409 states have call predecessors, (1417), 418 states have return successors, (1440), 1368 states have call predecessors, (1440), 1416 states have call successors, (1440) [2021-11-21 00:50:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 7169 transitions. [2021-11-21 00:50:14,254 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 7169 transitions. Word has length 149 [2021-11-21 00:50:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:14,255 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 7169 transitions. [2021-11-21 00:50:14,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:50:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 7169 transitions. [2021-11-21 00:50:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-21 00:50:14,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:14,263 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:14,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:14,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:14,477 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -579030723, now seen corresponding path program 1 times [2021-11-21 00:50:14,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197540699] [2021-11-21 00:50:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:14,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-21 00:50:14,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197540699] [2021-11-21 00:50:14,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197540699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821899289] [2021-11-21 00:50:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:14,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:14,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:50:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:50:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-21 00:50:16,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-21 00:50:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821899289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005891768] [2021-11-21 00:50:16,761 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2021-11-21 00:50:16,761 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:50:16,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:50:16,772 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:50:16,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:50:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:20,445 INFO L244 Elim1Store]: Index analysis took 580 ms [2021-11-21 00:50:28,437 WARN L227 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 658 DAG size of output: 381 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:50:28,440 INFO L354 Elim1Store]: treesize reduction 1263, result has 33.9 percent of original size [2021-11-21 00:50:28,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1489 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 55 case distinctions, treesize of input 285 treesize of output 822 [2021-11-21 00:50:44,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:50:59,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:51:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:51:20,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:51:23,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:26,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:26,675 INFO L244 Elim1Store]: Index analysis took 5631 ms [2021-11-21 00:52:32,343 WARN L227 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 879 DAG size of output: 439 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:52:32,346 INFO L354 Elim1Store]: treesize reduction 2074, result has 25.4 percent of original size [2021-11-21 00:52:32,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 58 select indices, 58 select index equivalence classes, 1544 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 165 case distinctions, treesize of input 304 treesize of output 901 [2021-11-21 00:52:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:52:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:52:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:52:56,391 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-21 00:52:56,434 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-21 00:52:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:52:58,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:52:58,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-21 00:53:01,170 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-21 00:53:13,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:13,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:53:18,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:53:21,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:28,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:30,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:53:34,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:35,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:53:36,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:43,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:45,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:53:50,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:53:51,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:53:51,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:01,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:02,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:03,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:54:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:10,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:54:10,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:19,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:20,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:54:21,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:26,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:26,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:54:28,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:54:57,251 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-21 00:55:00,107 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-21 00:55:00,192 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_memset with input of size 306 for LOIs [2021-11-21 00:55:12,318 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 279 for LOIs [2021-11-21 00:55:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:55:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:55:24,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:55:24,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:55:35,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:55:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:56:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:56:05,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:56:10,589 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 289 for LOIs [2021-11-21 00:56:16,396 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 261 for LOIs [2021-11-21 00:56:19,073 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 306 for LOIs [2021-11-21 00:56:22,398 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:56:29,743 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 279 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:56:39,432 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 289 DAG size of output: 287 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:57:28,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2005891768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:28,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:57:28,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [8, 10, 10] total 45 [2021-11-21 00:57:28,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630252104] [2021-11-21 00:57:28,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:28,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:57:28,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:57:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:57:28,861 INFO L87 Difference]: Start difference. First operand 5073 states and 7169 transitions. Second operand has 29 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-21 00:57:48,851 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 00:58:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:05,319 INFO L93 Difference]: Finished difference Result 10146 states and 14334 transitions. [2021-11-21 00:58:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-21 00:58:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) Word has length 163 [2021-11-21 00:58:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:05,347 INFO L225 Difference]: With dead ends: 10146 [2021-11-21 00:58:05,347 INFO L226 Difference]: Without dead ends: 5087 [2021-11-21 00:58:05,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:58:05,369 INFO L933 BasicCegarLoop]: 1108 mSDtfsCounter, 6 mSDsluCounter, 15678 mSDsCounter, 0 mSdLazyCounter, 6939 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15658 SdHoareTripleChecker+Invalid, 8452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 6939 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1498 IncrementalHoareTripleChecker+Unchecked, 36.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:05,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 15658 Invalid, 8452 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [14 Valid, 6939 Invalid, 1 Unknown, 1498 Unchecked, 36.0s Time] [2021-11-21 00:58:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2021-11-21 00:58:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 5087. [2021-11-21 00:58:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5087 states, 3245 states have (on average 1.3312788906009245) internal successors, (4320), 3357 states have internal predecessors, (4320), 1420 states have call successors, (1420), 414 states have call predecessors, (1420), 421 states have return successors, (1443), 1370 states have call predecessors, (1443), 1419 states have call successors, (1443) [2021-11-21 00:58:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5087 states to 5087 states and 7183 transitions. [2021-11-21 00:58:05,674 INFO L78 Accepts]: Start accepts. Automaton has 5087 states and 7183 transitions. Word has length 163 [2021-11-21 00:58:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:05,674 INFO L470 AbstractCegarLoop]: Abstraction has 5087 states and 7183 transitions. [2021-11-21 00:58:05,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-21 00:58:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5087 states and 7183 transitions. [2021-11-21 00:58:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-21 00:58:05,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:05,683 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:05,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:05,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:58:05,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1715709402, now seen corresponding path program 1 times [2021-11-21 00:58:05,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:05,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761742607] [2021-11-21 00:58:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:05,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-21 00:58:06,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761742607] [2021-11-21 00:58:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761742607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:58:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146101296] [2021-11-21 00:58:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:06,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:06,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:06,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf93094-d4f8-4830-ac8b-a7a6421ce0dc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:58:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:06,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:58:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-21 00:58:07,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:58:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-21 00:58:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146101296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:58:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436779304] [2021-11-21 00:58:08,069 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2021-11-21 00:58:08,069 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:58:08,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:58:08,070 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:58:08,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:58:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:58:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:12,050 INFO L244 Elim1Store]: Index analysis took 670 ms [2021-11-21 00:58:26,248 WARN L227 SmtUtils]: Spent 14.19s on a formula simplification. DAG size of input: 658 DAG size of output: 381 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:58:26,250 INFO L354 Elim1Store]: treesize reduction 1263, result has 33.9 percent of original size [2021-11-21 00:58:26,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1489 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 55 case distinctions, treesize of input 285 treesize of output 822 [2021-11-21 00:59:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 00:59:28,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:00:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:01:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:01:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:38,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:43,293 INFO L244 Elim1Store]: Index analysis took 23268 ms