./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V --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 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:23:55,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:23:55,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:23:55,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:23:55,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:23:55,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:23:55,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:23:55,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:23:55,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:23:55,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:23:55,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:23:55,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:23:55,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:23:55,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:23:55,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:23:55,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:23:55,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:23:55,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:23:55,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:23:55,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:23:55,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:23:55,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:23:55,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:23:55,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:23:55,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:23:55,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:23:55,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:23:55,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:23:55,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:23:55,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:23:55,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:23:55,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:23:55,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:23:55,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:23:55,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:23:55,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:23:55,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:23:55,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:23:55,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:23:55,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:23:55,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:23:55,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:23:55,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:23:55,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:23:55,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:23:55,380 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:23:55,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:23:55,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:23:55,382 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:23:55,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:23:55,383 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:23:55,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:23:55,383 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:23:55,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:23:55,384 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:23:55,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:23:55,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:23:55,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:23:55,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:23:55,391 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:23:55,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:23:55,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:23:55,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:23:55,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:23:55,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:23:55,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:23:55,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:23:55,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:23:55,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:23:55,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:23:55,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:23:55,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:55,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:23:55,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:23:55,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:23:55,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:23:55,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:23:55,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:23:55,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:23:55,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:23:55,403 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2021-11-23 02:23:55,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:23:55,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:23:55,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:23:55,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:23:55,748 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:23:55,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-23 02:23:55,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/9766d55bb/253fcf7493de45f7af742b7edd989763/FLAGb5163d1a3 [2021-11-23 02:23:56,878 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:23:56,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-23 02:23:56,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/9766d55bb/253fcf7493de45f7af742b7edd989763/FLAGb5163d1a3 [2021-11-23 02:23:57,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/9766d55bb/253fcf7493de45f7af742b7edd989763 [2021-11-23 02:23:57,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:23:57,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:23:57,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:57,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:23:57,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:23:57,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e88557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:57, skipping insertion in model container [2021-11-23 02:23:57,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:57" (1/1) ... [2021-11-23 02:23:57,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:23:57,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:23:58,633 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-23 02:23:59,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:59,078 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:23:59,298 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-23 02:23:59,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:59,616 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:23:59,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59 WrapperNode [2021-11-23 02:23:59,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:59,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:59,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:23:59,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:23:59,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,826 INFO L137 Inliner]: procedures = 176, calls = 448, calls flagged for inlining = 92, calls inlined = 85, statements flattened = 1769 [2021-11-23 02:23:59,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:59,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:23:59,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:23:59,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:23:59,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:23:59,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:24:00,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:24:00,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:24:00,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:24:00,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:24:00,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:24:00,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (1/1) ... [2021-11-23 02:24:00,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:24:00,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:00,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:24:00,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:24:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:24:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:24:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_15 [2021-11-23 02:24:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_15 [2021-11-23 02:24:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_poll [2021-11-23 02:24:00,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_poll [2021-11-23 02:24:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:24:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-23 02:24:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-23 02:24:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:24:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:24:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:24:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:24:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:24:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-23 02:24:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-23 02:24:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-11-23 02:24:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-11-23 02:24:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:24:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:24:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-23 02:24:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-23 02:24:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:24:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:24:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure spin_trylock_bh [2021-11-23 02:24:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_trylock_bh [2021-11-23 02:24:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:24:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:24:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-23 02:24:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-23 02:24:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-23 02:24:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-23 02:24:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_synctty_ioctl [2021-11-23 02:24:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_synctty_ioctl [2021-11-23 02:24:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:24:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:24:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:24:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:24:00,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:24:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-23 02:24:00,164 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-23 02:24:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_close [2021-11-23 02:24:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_close [2021-11-23 02:24:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:24:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:24:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:24:00,166 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:24:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_print_buffer [2021-11-23 02:24:00,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_print_buffer [2021-11-23 02:24:00,168 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:24:00,169 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:24:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:24:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:24:00,170 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:24:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:24:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:24:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:24:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:24:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:24:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-23 02:24:00,173 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-23 02:24:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-23 02:24:00,174 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-23 02:24:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:24:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-23 02:24:00,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-23 02:24:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-23 02:24:00,175 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-23 02:24:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure sp_put [2021-11-23 02:24:00,175 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_put [2021-11-23 02:24:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:24:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:24:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-11-23 02:24:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-11-23 02:24:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_hangup [2021-11-23 02:24:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_hangup [2021-11-23 02:24:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:24:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:24:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-23 02:24:00,178 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-23 02:24:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure sp_get [2021-11-23 02:24:00,178 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_get [2021-11-23 02:24:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:24:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:24:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:24:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-23 02:24:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-23 02:24:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:24:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:24:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:24:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:24:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:24:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:24:00,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:24:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_push [2021-11-23 02:24:00,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_push [2021-11-23 02:24:00,749 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:24:00,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:24:00,851 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:24:02,290 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:24:02,784 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:24:02,784 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:24:02,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:02 BoogieIcfgContainer [2021-11-23 02:24:02,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:24:02,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:24:02,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:24:02,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:24:02,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:57" (1/3) ... [2021-11-23 02:24:02,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3373453e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:02, skipping insertion in model container [2021-11-23 02:24:02,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:59" (2/3) ... [2021-11-23 02:24:02,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3373453e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:02, skipping insertion in model container [2021-11-23 02:24:02,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:02" (3/3) ... [2021-11-23 02:24:02,813 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-23 02:24:02,820 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:24:02,820 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:24:02,908 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:24:02,917 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 [2021-11-23 02:24:02,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:24:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 446 states, 285 states have (on average 1.3929824561403508) internal successors, (397), 301 states have internal predecessors, (397), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2021-11-23 02:24:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:24:02,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:02,982 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:02,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1989573905, now seen corresponding path program 1 times [2021-11-23 02:24:03,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:03,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356516014] [2021-11-23 02:24:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:03,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:24:03,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:03,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356516014] [2021-11-23 02:24:03,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356516014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:03,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:03,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:24:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416634730] [2021-11-23 02:24:03,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:03,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:24:03,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:24:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:24:03,628 INFO L87 Difference]: Start difference. First operand has 446 states, 285 states have (on average 1.3929824561403508) internal successors, (397), 301 states have internal predecessors, (397), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:24:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:05,085 INFO L93 Difference]: Finished difference Result 1282 states and 1859 transitions. [2021-11-23 02:24:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:24:05,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 71 [2021-11-23 02:24:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:05,115 INFO L225 Difference]: With dead ends: 1282 [2021-11-23 02:24:05,115 INFO L226 Difference]: Without dead ends: 845 [2021-11-23 02:24:05,125 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 [2021-11-23 02:24:05,141 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 575 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:05,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1187 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:24:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-11-23 02:24:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-11-23 02:24:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 549 states have (on average 1.3679417122040072) internal successors, (751), 569 states have internal predecessors, (751), 219 states have call successors, (219), 77 states have call predecessors, (219), 76 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-23 02:24:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1188 transitions. [2021-11-23 02:24:05,332 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1188 transitions. Word has length 71 [2021-11-23 02:24:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:05,334 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1188 transitions. [2021-11-23 02:24:05,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:24:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1188 transitions. [2021-11-23 02:24:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:24:05,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:05,341 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:05,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:24:05,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1681378147, now seen corresponding path program 1 times [2021-11-23 02:24:05,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:05,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586392910] [2021-11-23 02:24:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:05,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:24:05,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586392910] [2021-11-23 02:24:05,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586392910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:05,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:05,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:24:05,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421488825] [2021-11-23 02:24:05,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:05,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:24:05,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:24:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:24:05,585 INFO L87 Difference]: Start difference. First operand 845 states and 1188 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:24:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:08,025 INFO L93 Difference]: Finished difference Result 1669 states and 2383 transitions. [2021-11-23 02:24:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:24:08,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 74 [2021-11-23 02:24:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:08,048 INFO L225 Difference]: With dead ends: 1669 [2021-11-23 02:24:08,048 INFO L226 Difference]: Without dead ends: 1664 [2021-11-23 02:24:08,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:24:08,053 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 601 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:08,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 1795 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:24:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-11-23 02:24:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1656. [2021-11-23 02:24:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1076 states have (on average 1.370817843866171) internal successors, (1475), 1116 states have internal predecessors, (1475), 427 states have call successors, (427), 153 states have call predecessors, (427), 152 states have return successors, (464), 418 states have call predecessors, (464), 426 states have call successors, (464) [2021-11-23 02:24:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2366 transitions. [2021-11-23 02:24:08,211 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2366 transitions. Word has length 74 [2021-11-23 02:24:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:08,212 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 2366 transitions. [2021-11-23 02:24:08,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:24:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2366 transitions. [2021-11-23 02:24:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:24:08,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:08,225 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:08,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:24:08,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 462867534, now seen corresponding path program 1 times [2021-11-23 02:24:08,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603202889] [2021-11-23 02:24:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:08,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:24:08,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603202889] [2021-11-23 02:24:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603202889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:08,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:08,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:24:08,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520075350] [2021-11-23 02:24:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:08,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:24:08,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:08,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:24:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:24:08,519 INFO L87 Difference]: Start difference. First operand 1656 states and 2366 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:24:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:09,521 INFO L93 Difference]: Finished difference Result 4216 states and 5967 transitions. [2021-11-23 02:24:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:24:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-11-23 02:24:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:09,549 INFO L225 Difference]: With dead ends: 4216 [2021-11-23 02:24:09,549 INFO L226 Difference]: Without dead ends: 2581 [2021-11-23 02:24:09,558 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 [2021-11-23 02:24:09,560 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 348 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:09,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1061 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:24:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-11-23 02:24:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2574. [2021-11-23 02:24:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 1692 states have (on average 1.3599290780141844) internal successors, (2301), 1738 states have internal predecessors, (2301), 633 states have call successors, (633), 249 states have call predecessors, (633), 248 states have return successors, (688), 622 states have call predecessors, (688), 632 states have call successors, (688) [2021-11-23 02:24:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3622 transitions. [2021-11-23 02:24:09,740 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3622 transitions. Word has length 111 [2021-11-23 02:24:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:09,742 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 3622 transitions. [2021-11-23 02:24:09,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:24:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3622 transitions. [2021-11-23 02:24:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 02:24:09,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:09,769 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:09,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:24:09,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -581744897, now seen corresponding path program 1 times [2021-11-23 02:24:09,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774266740] [2021-11-23 02:24:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:09,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:24:09,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774266740] [2021-11-23 02:24:09,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774266740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:09,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:09,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:24:09,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169581132] [2021-11-23 02:24:09,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:09,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:24:09,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:24:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:24:09,949 INFO L87 Difference]: Start difference. First operand 2574 states and 3622 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:24:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:11,715 INFO L93 Difference]: Finished difference Result 6264 states and 8775 transitions. [2021-11-23 02:24:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:24:11,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 128 [2021-11-23 02:24:11,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:11,785 INFO L225 Difference]: With dead ends: 6264 [2021-11-23 02:24:11,785 INFO L226 Difference]: Without dead ends: 3711 [2021-11-23 02:24:11,796 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 [2021-11-23 02:24:11,798 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 391 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:11,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1269 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:24:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-11-23 02:24:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 3706. [2021-11-23 02:24:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2449 states have (on average 1.3658636178031849) internal successors, (3345), 2531 states have internal predecessors, (3345), 874 states have call successors, (874), 383 states have call predecessors, (874), 382 states have return successors, (953), 855 states have call predecessors, (953), 873 states have call successors, (953) [2021-11-23 02:24:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5172 transitions. [2021-11-23 02:24:12,044 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5172 transitions. Word has length 128 [2021-11-23 02:24:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:12,045 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 5172 transitions. [2021-11-23 02:24:12,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:24:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5172 transitions. [2021-11-23 02:24:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 02:24:12,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:12,057 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:12,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:24:12,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 321831774, now seen corresponding path program 1 times [2021-11-23 02:24:12,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:12,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562848920] [2021-11-23 02:24:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:12,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 02:24:12,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562848920] [2021-11-23 02:24:12,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562848920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:12,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:12,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:24:12,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151479380] [2021-11-23 02:24:12,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:12,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:24:12,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:24:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:24:12,195 INFO L87 Difference]: Start difference. First operand 3706 states and 5172 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:24:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:13,564 INFO L93 Difference]: Finished difference Result 9110 states and 12673 transitions. [2021-11-23 02:24:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:24:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 129 [2021-11-23 02:24:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:13,624 INFO L225 Difference]: With dead ends: 9110 [2021-11-23 02:24:13,624 INFO L226 Difference]: Without dead ends: 5433 [2021-11-23 02:24:13,639 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 [2021-11-23 02:24:13,643 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 448 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:13,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1095 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:24:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2021-11-23 02:24:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 5426. [2021-11-23 02:24:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 3639 states have (on average 1.3561417971970322) internal successors, (4935), 3743 states have internal predecessors, (4935), 1200 states have call successors, (1200), 587 states have call predecessors, (1200), 586 states have return successors, (1311), 1179 states have call predecessors, (1311), 1199 states have call successors, (1311) [2021-11-23 02:24:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 7446 transitions. [2021-11-23 02:24:13,999 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 7446 transitions. Word has length 129 [2021-11-23 02:24:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:13,999 INFO L470 AbstractCegarLoop]: Abstraction has 5426 states and 7446 transitions. [2021-11-23 02:24:14,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:24:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 7446 transitions. [2021-11-23 02:24:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 02:24:14,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:14,015 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:14,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:24:14,015 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash 402002428, now seen corresponding path program 1 times [2021-11-23 02:24:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110727503] [2021-11-23 02:24:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:14,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 02:24:14,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110727503] [2021-11-23 02:24:14,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110727503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:14,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:14,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:24:14,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678608904] [2021-11-23 02:24:14,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:14,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:24:14,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:24:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:24:14,207 INFO L87 Difference]: Start difference. First operand 5426 states and 7446 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:24:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:15,798 INFO L93 Difference]: Finished difference Result 8186 states and 11366 transitions. [2021-11-23 02:24:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:24:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 133 [2021-11-23 02:24:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:15,851 INFO L225 Difference]: With dead ends: 8186 [2021-11-23 02:24:15,851 INFO L226 Difference]: Without dead ends: 5466 [2021-11-23 02:24:15,865 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 [2021-11-23 02:24:15,866 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 4 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:15,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1060 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:24:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-11-23 02:24:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 5466. [2021-11-23 02:24:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 3669 states have (on average 1.3532297628781684) internal successors, (4965), 3783 states have internal predecessors, (4965), 1200 states have call successors, (1200), 587 states have call predecessors, (1200), 596 states have return successors, (1321), 1179 states have call predecessors, (1321), 1199 states have call successors, (1321) [2021-11-23 02:24:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 7486 transitions. [2021-11-23 02:24:16,250 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 7486 transitions. Word has length 133 [2021-11-23 02:24:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 5466 states and 7486 transitions. [2021-11-23 02:24:16,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:24:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 7486 transitions. [2021-11-23 02:24:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 02:24:16,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:16,266 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:16,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:24:16,267 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash -851000526, now seen corresponding path program 1 times [2021-11-23 02:24:16,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:16,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994210079] [2021-11-23 02:24:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:16,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 02:24:16,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994210079] [2021-11-23 02:24:16,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994210079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:16,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:16,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:24:16,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029225] [2021-11-23 02:24:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:16,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:24:16,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:24:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:24:16,596 INFO L87 Difference]: Start difference. First operand 5466 states and 7486 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-23 02:24:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:21,118 INFO L93 Difference]: Finished difference Result 11865 states and 16355 transitions. [2021-11-23 02:24:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:24:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 134 [2021-11-23 02:24:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:21,168 INFO L225 Difference]: With dead ends: 11865 [2021-11-23 02:24:21,169 INFO L226 Difference]: Without dead ends: 6428 [2021-11-23 02:24:21,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:24:21,191 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 1100 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 2328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:21,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 1972 Invalid, 2328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 02:24:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2021-11-23 02:24:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 6058. [2021-11-23 02:24:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6058 states, 4011 states have (on average 1.3380703066566941) internal successors, (5367), 4153 states have internal predecessors, (5367), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 700 states have return successors, (1519), 1331 states have call predecessors, (1519), 1345 states have call successors, (1519) [2021-11-23 02:24:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6058 states to 6058 states and 8232 transitions. [2021-11-23 02:24:21,540 INFO L78 Accepts]: Start accepts. Automaton has 6058 states and 8232 transitions. Word has length 134 [2021-11-23 02:24:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:21,541 INFO L470 AbstractCegarLoop]: Abstraction has 6058 states and 8232 transitions. [2021-11-23 02:24:21,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-23 02:24:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6058 states and 8232 transitions. [2021-11-23 02:24:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 02:24:21,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:21,561 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:21,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:24:21,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash 992567424, now seen corresponding path program 1 times [2021-11-23 02:24:21,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208272717] [2021-11-23 02:24:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:21,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-23 02:24:21,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208272717] [2021-11-23 02:24:21,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208272717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:21,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:21,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:24:21,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173409525] [2021-11-23 02:24:21,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:21,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:24:21,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:21,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:24:21,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:24:21,759 INFO L87 Difference]: Start difference. First operand 6058 states and 8232 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:24:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:23,523 INFO L93 Difference]: Finished difference Result 12185 states and 16644 transitions. [2021-11-23 02:24:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:24:23,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 164 [2021-11-23 02:24:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:23,569 INFO L225 Difference]: With dead ends: 12185 [2021-11-23 02:24:23,569 INFO L226 Difference]: Without dead ends: 6156 [2021-11-23 02:24:23,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:24:23,591 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 2 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:23,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:24:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2021-11-23 02:24:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 6122. [2021-11-23 02:24:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 4059 states have (on average 1.3340724316334072) internal successors, (5415), 4201 states have internal predecessors, (5415), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 716 states have return successors, (1543), 1347 states have call predecessors, (1543), 1345 states have call successors, (1543) [2021-11-23 02:24:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 8304 transitions. [2021-11-23 02:24:24,008 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 8304 transitions. Word has length 164 [2021-11-23 02:24:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 6122 states and 8304 transitions. [2021-11-23 02:24:24,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:24:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 8304 transitions. [2021-11-23 02:24:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:24:24,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:24,035 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:24,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:24:24,036 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1336445128, now seen corresponding path program 1 times [2021-11-23 02:24:24,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154816857] [2021-11-23 02:24:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:24,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-23 02:24:24,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:24,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154816857] [2021-11-23 02:24:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154816857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:24:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791889992] [2021-11-23 02:24:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:24,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:24,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:24,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:24:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:24,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:24:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-23 02:24:25,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:24:25,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791889992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:25,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:24:25,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-23 02:24:25,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863571512] [2021-11-23 02:24:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:25,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:24:25,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:24:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:24:25,613 INFO L87 Difference]: Start difference. First operand 6122 states and 8304 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:24:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:27,787 INFO L93 Difference]: Finished difference Result 14275 states and 19605 transitions. [2021-11-23 02:24:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:24:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 182 [2021-11-23 02:24:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:27,843 INFO L225 Difference]: With dead ends: 14275 [2021-11-23 02:24:27,844 INFO L226 Difference]: Without dead ends: 8182 [2021-11-23 02:24:27,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:24:27,868 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 592 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:27,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1703 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:24:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-11-23 02:24:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7382. [2021-11-23 02:24:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 4957 states have (on average 1.3401250756505951) internal successors, (6643), 5113 states have internal predecessors, (6643), 1586 states have call successors, (1586), 775 states have call predecessors, (1586), 838 states have return successors, (1831), 1589 states have call predecessors, (1831), 1585 states have call successors, (1831) [2021-11-23 02:24:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 10060 transitions. [2021-11-23 02:24:28,258 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 10060 transitions. Word has length 182 [2021-11-23 02:24:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:28,259 INFO L470 AbstractCegarLoop]: Abstraction has 7382 states and 10060 transitions. [2021-11-23 02:24:28,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:24:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 10060 transitions. [2021-11-23 02:24:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-23 02:24:28,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:28,334 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:28,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:28,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:24:28,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1505802165, now seen corresponding path program 1 times [2021-11-23 02:24:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710263651] [2021-11-23 02:24:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:28,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-23 02:24:28,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710263651] [2021-11-23 02:24:28,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710263651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:24:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928203263] [2021-11-23 02:24:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:28,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:28,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:28,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:28,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:24:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:29,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:24:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 96 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-23 02:24:30,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-23 02:24:31,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928203263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375860372] [2021-11-23 02:24:31,276 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2021-11-23 02:24:31,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:24:31,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:24:31,290 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:24:31,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:24:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-23 02:24:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-23 02:24:32,578 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 [2021-11-23 02:24:32,586 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 [2021-11-23 02:24:32,595 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 [2021-11-23 02:24:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-23 02:24:33,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:33,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-23 02:24:45,184 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 7 treesize of output 3 [2021-11-23 02:24:45,232 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 7 treesize of output 3 [2021-11-23 02:24:45,388 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 7 treesize of output 3 [2021-11-23 02:24:45,408 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 7 treesize of output 3 [2021-11-23 02:24:49,033 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 15 treesize of output 11 [2021-11-23 02:24:49,039 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 23 treesize of output 1 [2021-11-23 02:24:49,045 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 15 treesize of output 11 [2021-11-23 02:24:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:24:49,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-23 02:24:49,440 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 9 treesize of output 3 [2021-11-23 02:24:49,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:24:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:49,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:24:49,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 02:24:51,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:24:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:51,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:24:51,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 02:24:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:51,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:24:51,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:24:51,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-23 02:24:51,467 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 9 treesize of output 3 [2021-11-23 02:24:54,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:24:54,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:24:54,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:24:55,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:24:55,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:24:55,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:24:56,741 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 7 treesize of output 3 [2021-11-23 02:24:56,775 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 7 treesize of output 3 [2021-11-23 02:24:57,042 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 7 treesize of output 3 [2021-11-23 02:24:57,091 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 7 treesize of output 3 [2021-11-23 02:25:03,216 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 9 treesize of output 3 [2021-11-23 02:25:03,559 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 9 treesize of output 3 [2021-11-23 02:25:06,813 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_free with input of size 72 for LOIs [2021-11-23 02:25:06,938 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_sync_push with input of size 75 for LOIs [2021-11-23 02:25:07,062 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_dev_alloc_skb_15 with input of size 88 for LOIs [2021-11-23 02:25:07,255 INFO L197 IcfgInterpreter]: Interpreting procedure test_and_set_bit with input of size 64 for LOIs [2021-11-23 02:25:07,273 INFO L197 IcfgInterpreter]: Interpreting procedure spin_trylock_bh with input of size 68 for LOIs [2021-11-23 02:25:07,285 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_alloc with input of size 74 for LOIs [2021-11-23 02:25:07,709 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 23 treesize of output 1 [2021-11-23 02:25:07,718 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 15 treesize of output 11 [2021-11-23 02:25:07,727 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 15 treesize of output 11 [2021-11-23 02:25:07,813 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 108 for LOIs [2021-11-23 02:25:07,923 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 [2021-11-23 02:25:07,947 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 [2021-11-23 02:25:07,960 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 [2021-11-23 02:25:08,440 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 129 for LOIs [2021-11-23 02:25:08,529 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_remove with input of size 76 for LOIs [2021-11-23 02:25:08,574 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:26:20,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [375860372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:20,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:26:20,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [9, 9, 10] total 111 [2021-11-23 02:26:20,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372463947] [2021-11-23 02:26:20,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:20,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-23 02:26:20,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-23 02:26:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=11467, Unknown=0, NotChecked=0, Total=12210 [2021-11-23 02:26:20,863 INFO L87 Difference]: Start difference. First operand 7382 states and 10060 transitions. Second operand has 91 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 62 states have internal predecessors, (75), 22 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 02:29:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:13,585 INFO L93 Difference]: Finished difference Result 15524 states and 21280 transitions. [2021-11-23 02:29:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-23 02:29:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 62 states have internal predecessors, (75), 22 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 168 [2021-11-23 02:29:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:13,620 INFO L225 Difference]: With dead ends: 15524 [2021-11-23 02:29:13,621 INFO L226 Difference]: Without dead ends: 8158 [2021-11-23 02:29:13,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 406 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10777 ImplicationChecksByTransitivity, 167.6s TimeCoverageRelationStatistics Valid=1826, Invalid=28974, Unknown=0, NotChecked=0, Total=30800 [2021-11-23 02:29:13,654 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 1109 mSDsluCounter, 29099 mSDsCounter, 0 mSdLazyCounter, 27980 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 26347 SdHoareTripleChecker+Invalid, 31114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 27980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2496 IncrementalHoareTripleChecker+Unchecked, 76.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:13,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 26347 Invalid, 31114 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [638 Valid, 27980 Invalid, 0 Unknown, 2496 Unchecked, 76.3s Time] [2021-11-23 02:29:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8158 states. [2021-11-23 02:29:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8158 to 7859. [2021-11-23 02:29:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 5330 states have (on average 1.3450281425891182) internal successors, (7169), 5489 states have internal predecessors, (7169), 1674 states have call successors, (1674), 786 states have call predecessors, (1674), 854 states have return successors, (1931), 1679 states have call predecessors, (1931), 1673 states have call successors, (1931) [2021-11-23 02:29:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 10774 transitions. [2021-11-23 02:29:14,243 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 10774 transitions. Word has length 168 [2021-11-23 02:29:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:14,245 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 10774 transitions. [2021-11-23 02:29:14,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 62 states have internal predecessors, (75), 22 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 02:29:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 10774 transitions. [2021-11-23 02:29:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 02:29:14,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:14,274 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:14,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:14,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:14,487 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1990570803, now seen corresponding path program 1 times [2021-11-23 02:29:14,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604701400] [2021-11-23 02:29:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:14,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-23 02:29:14,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604701400] [2021-11-23 02:29:14,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604701400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:14,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:14,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:14,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283031204] [2021-11-23 02:29:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:14,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:14,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:14,626 INFO L87 Difference]: Start difference. First operand 7859 states and 10774 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:29:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:16,609 INFO L93 Difference]: Finished difference Result 12098 states and 16740 transitions. [2021-11-23 02:29:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:29:16,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 169 [2021-11-23 02:29:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:16,659 INFO L225 Difference]: With dead ends: 12098 [2021-11-23 02:29:16,659 INFO L226 Difference]: Without dead ends: 7993 [2021-11-23 02:29:16,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:16,677 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 9 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:16,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1591 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:29:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7993 states. [2021-11-23 02:29:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7993 to 7924. [2021-11-23 02:29:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7924 states, 5387 states have (on average 1.345275663634676) internal successors, (7247), 5554 states have internal predecessors, (7247), 1674 states have call successors, (1674), 786 states have call predecessors, (1674), 862 states have return successors, (1939), 1679 states have call predecessors, (1939), 1673 states have call successors, (1939) [2021-11-23 02:29:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7924 states to 7924 states and 10860 transitions. [2021-11-23 02:29:17,304 INFO L78 Accepts]: Start accepts. Automaton has 7924 states and 10860 transitions. Word has length 169 [2021-11-23 02:29:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:17,307 INFO L470 AbstractCegarLoop]: Abstraction has 7924 states and 10860 transitions. [2021-11-23 02:29:17,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:29:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7924 states and 10860 transitions. [2021-11-23 02:29:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-23 02:29:17,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:17,331 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:17,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:29:17,331 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:17,332 INFO L85 PathProgramCache]: Analyzing trace with hash -228372829, now seen corresponding path program 1 times [2021-11-23 02:29:17,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:17,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846929656] [2021-11-23 02:29:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:17,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-23 02:29:17,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:17,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846929656] [2021-11-23 02:29:17,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846929656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:17,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526642014] [2021-11-23 02:29:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:17,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:17,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:17,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:17,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:29:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:29:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 96 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-23 02:29:18,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-23 02:29:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526642014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978919130] [2021-11-23 02:29:19,249 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-23 02:29:19,249 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:29:19,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:29:19,250 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:29:19,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:29:19,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-23 02:29:19,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2021-11-23 02:29:19,937 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 [2021-11-23 02:29:19,958 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 [2021-11-23 02:29:19,966 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 [2021-11-23 02:29:20,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-23 02:29:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:20,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-23 02:29:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-23 02:29:27,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-23 02:29:27,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-23 02:29:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-23 02:29:28,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-23 02:29:28,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-23 02:29:29,951 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 7 treesize of output 3 [2021-11-23 02:29:29,974 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 7 treesize of output 3 [2021-11-23 02:29:30,063 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 7 treesize of output 3 [2021-11-23 02:29:30,083 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 7 treesize of output 3 [2021-11-23 02:29:32,822 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 23 treesize of output 1 [2021-11-23 02:29:32,827 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 15 treesize of output 11 [2021-11-23 02:29:32,832 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 15 treesize of output 11 [2021-11-23 02:29:33,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:33,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:33,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:33,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-23 02:29:33,080 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 9 treesize of output 3 [2021-11-23 02:29:33,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:33,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:33,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 02:29:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:33,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:33,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-23 02:29:34,012 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 9 treesize of output 3 [2021-11-23 02:29:34,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:34,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:34,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 02:29:40,079 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 7 treesize of output 3 [2021-11-23 02:29:40,100 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 7 treesize of output 3 [2021-11-23 02:29:40,234 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 7 treesize of output 3 [2021-11-23 02:29:40,284 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 7 treesize of output 3 [2021-11-23 02:29:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:43,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-23 02:29:43,128 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 9 treesize of output 3 [2021-11-23 02:29:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:43,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:43,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 02:29:43,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:43,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:29:43,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 02:29:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:29:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:29:44,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-23 02:29:44,059 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 9 treesize of output 3 [2021-11-23 02:29:49,451 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 7 treesize of output 3 [2021-11-23 02:29:49,483 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 7 treesize of output 3 [2021-11-23 02:29:49,619 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 7 treesize of output 3 [2021-11-23 02:29:49,647 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 7 treesize of output 3 [2021-11-23 02:29:51,991 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 9 treesize of output 3 [2021-11-23 02:29:52,270 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 9 treesize of output 3 [2021-11-23 02:29:55,387 INFO L197 IcfgInterpreter]: Interpreting procedure clear_bit with input of size 60 for LOIs [2021-11-23 02:29:55,393 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_free with input of size 72 for LOIs [2021-11-23 02:29:55,484 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_sync_push with input of size 119 for LOIs [2021-11-23 02:29:56,002 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_dev_alloc_skb_15 with input of size 88 for LOIs [2021-11-23 02:29:56,200 INFO L197 IcfgInterpreter]: Interpreting procedure test_and_set_bit with input of size 58 for LOIs [2021-11-23 02:29:56,206 INFO L197 IcfgInterpreter]: Interpreting procedure spin_trylock_bh with input of size 73 for LOIs [2021-11-23 02:29:56,222 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_alloc with input of size 74 for LOIs [2021-11-23 02:29:56,658 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 23 treesize of output 1 [2021-11-23 02:29:56,667 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 15 treesize of output 11 [2021-11-23 02:29:56,676 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 15 treesize of output 11 [2021-11-23 02:29:56,731 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 99 for LOIs [2021-11-23 02:29:56,807 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 [2021-11-23 02:29:56,818 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 [2021-11-23 02:29:56,828 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 [2021-11-23 02:29:57,238 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 120 for LOIs [2021-11-23 02:29:57,307 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_remove with input of size 76 for LOIs [2021-11-23 02:29:57,348 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 90 for LOIs [2021-11-23 02:29:57,374 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:58,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '225548#(and (<= 0 ~ldv_state_variable_2~0) (= |~#set_impl~0.offset| 0) (= 21 |~#sync_ops~0.base|) (= |~#ppp_sync_ldisc~0.offset| 0) (= ~LDV_IN_INTERRUPT~0 1) (= ~LDV_SKBS~0.base 0) (<= 0 ~ppp_sync_ldisc_group1~0.offset) (= ~ldv_retval_1~0 0) (<= ~ppp_sync_ldisc_group1~0.offset 0) (= ~LDV_SKBS~0.offset 0) (<= ~ldv_state_variable_1~0 1) (<= ~sync_ops_group0~0.offset 0) (= 23 |~#ppp_sync_ldisc~0.base|) (<= 0 ~ldv_state_variable_1~0) (= ~ldv_state_variable_0~0 2) (= |~#sync_ops~0.offset| 0) (= ~ref_cnt~0 0) (= |~#disc_data_lock~0.base| 22) (= |~#disc_data_lock~0.offset| 0) (= |#NULL.offset| 0) (= ~ldv_retval_0~0 0) (<= ~ldv_state_variable_2~0 1) (<= 0 ~sync_ops_group0~0.offset) (<= 0 |#StackHeapBarrier|) (= (ite (= ~last_index~0 0) 1 0) 0) (= |~#set_impl~0.base| 24) (= |#NULL.base| 0))' at error location [2021-11-23 02:30:58,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:30:58,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:58,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2021-11-23 02:30:58,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128630753] [2021-11-23 02:30:58,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:30:58,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:30:58,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:58,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:30:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=12914, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 02:30:58,745 INFO L87 Difference]: Start difference. First operand 7924 states and 10860 transitions. Second operand has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 11 states have call successors, (48), 8 states have call predecessors, (48), 12 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-23 02:31:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:14,563 INFO L93 Difference]: Finished difference Result 23732 states and 33562 transitions. [2021-11-23 02:31:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:31:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 11 states have call successors, (48), 8 states have call predecessors, (48), 12 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) Word has length 171 [2021-11-23 02:31:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:14,651 INFO L225 Difference]: With dead ends: 23732 [2021-11-23 02:31:14,652 INFO L226 Difference]: Without dead ends: 19559 [2021-11-23 02:31:14,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 412 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7484 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=960, Invalid=17400, Unknown=0, NotChecked=0, Total=18360 [2021-11-23 02:31:14,676 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 5825 mSDsluCounter, 5338 mSDsCounter, 0 mSdLazyCounter, 8528 mSolverCounterSat, 3511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6090 SdHoareTripleChecker+Valid, 5384 SdHoareTripleChecker+Invalid, 12039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3511 IncrementalHoareTripleChecker+Valid, 8528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:14,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6090 Valid, 5384 Invalid, 12039 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3511 Valid, 8528 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2021-11-23 02:31:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19559 states. [2021-11-23 02:31:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19559 to 19116. [2021-11-23 02:31:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19116 states, 12942 states have (on average 1.3486323597589245) internal successors, (17454), 13382 states have internal predecessors, (17454), 4113 states have call successors, (4113), 1862 states have call predecessors, (4113), 2060 states have return successors, (4977), 4115 states have call predecessors, (4977), 4112 states have call successors, (4977) [2021-11-23 02:31:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19116 states to 19116 states and 26544 transitions. [2021-11-23 02:31:15,749 INFO L78 Accepts]: Start accepts. Automaton has 19116 states and 26544 transitions. Word has length 171 [2021-11-23 02:31:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:15,750 INFO L470 AbstractCegarLoop]: Abstraction has 19116 states and 26544 transitions. [2021-11-23 02:31:15,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 11 states have call successors, (48), 8 states have call predecessors, (48), 12 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-23 02:31:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 19116 states and 26544 transitions. [2021-11-23 02:31:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-23 02:31:15,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:15,772 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:15,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:31:15,988 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1102481638, now seen corresponding path program 1 times [2021-11-23 02:31:15,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:15,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610346223] [2021-11-23 02:31:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:15,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 02:31:16,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:16,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610346223] [2021-11-23 02:31:16,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610346223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:16,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:16,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:31:16,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525085604] [2021-11-23 02:31:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:16,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:31:16,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:31:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:31:16,158 INFO L87 Difference]: Start difference. First operand 19116 states and 26544 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:31:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:19,499 INFO L93 Difference]: Finished difference Result 51739 states and 75304 transitions. [2021-11-23 02:31:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:31:19,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 171 [2021-11-23 02:31:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:19,688 INFO L225 Difference]: With dead ends: 51739 [2021-11-23 02:31:19,688 INFO L226 Difference]: Without dead ends: 33122 [2021-11-23 02:31:19,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:19,748 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 600 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:19,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 2372 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:31:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33122 states. [2021-11-23 02:31:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33122 to 19196. [2021-11-23 02:31:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19196 states, 13022 states have (on average 1.3464905544463217) internal successors, (17534), 13462 states have internal predecessors, (17534), 4113 states have call successors, (4113), 1862 states have call predecessors, (4113), 2060 states have return successors, (4977), 4115 states have call predecessors, (4977), 4112 states have call successors, (4977) [2021-11-23 02:31:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19196 states to 19196 states and 26624 transitions. [2021-11-23 02:31:21,261 INFO L78 Accepts]: Start accepts. Automaton has 19196 states and 26624 transitions. Word has length 171 [2021-11-23 02:31:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:21,262 INFO L470 AbstractCegarLoop]: Abstraction has 19196 states and 26624 transitions. [2021-11-23 02:31:21,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:31:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 19196 states and 26624 transitions. [2021-11-23 02:31:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 02:31:21,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:21,285 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:21,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:31:21,285 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1393916888, now seen corresponding path program 1 times [2021-11-23 02:31:21,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905633695] [2021-11-23 02:31:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:21,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-23 02:31:23,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905633695] [2021-11-23 02:31:23,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905633695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584536854] [2021-11-23 02:31:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:23,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:23,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:23,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:31:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 02:31:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-23 02:31:24,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:31:24,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584536854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:24,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:31:24,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 37 [2021-11-23 02:31:24,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423086712] [2021-11-23 02:31:24,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:24,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:31:24,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:31:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:31:24,433 INFO L87 Difference]: Start difference. First operand 19196 states and 26624 transitions. Second operand has 12 states, 10 states have (on average 8.8) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:31:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:36,436 INFO L93 Difference]: Finished difference Result 45664 states and 65354 transitions. [2021-11-23 02:31:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:31:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 8.8) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 2 states have call successors, (24) Word has length 174 [2021-11-23 02:31:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:36,558 INFO L225 Difference]: With dead ends: 45664 [2021-11-23 02:31:36,559 INFO L226 Difference]: Without dead ends: 26949 [2021-11-23 02:31:36,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:31:36,853 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 230 mSDsluCounter, 9457 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 9232 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:36,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 9232 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 02:31:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26949 states. [2021-11-23 02:31:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26949 to 19420. [2021-11-23 02:31:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19420 states, 13169 states have (on average 1.3383704153694282) internal successors, (17625), 13610 states have internal predecessors, (17625), 4111 states have call successors, (4111), 1860 states have call predecessors, (4111), 2139 states have return successors, (5075), 4193 states have call predecessors, (5075), 4110 states have call successors, (5075) [2021-11-23 02:31:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19420 states to 19420 states and 26811 transitions. [2021-11-23 02:31:38,113 INFO L78 Accepts]: Start accepts. Automaton has 19420 states and 26811 transitions. Word has length 174 [2021-11-23 02:31:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:38,114 INFO L470 AbstractCegarLoop]: Abstraction has 19420 states and 26811 transitions. [2021-11-23 02:31:38,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 8.8) internal successors, (88), 8 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:31:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19420 states and 26811 transitions. [2021-11-23 02:31:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-23 02:31:38,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:38,135 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:38,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:38,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:31:38,353 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -766509561, now seen corresponding path program 1 times [2021-11-23 02:31:38,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:38,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143002653] [2021-11-23 02:31:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:38,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-23 02:31:38,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:38,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143002653] [2021-11-23 02:31:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143002653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:38,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763507426] [2021-11-23 02:31:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:38,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:38,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:38,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:38,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:31:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:38,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1462 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:31:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-23 02:31:39,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:31:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763507426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:39,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:31:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-23 02:31:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816914475] [2021-11-23 02:31:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:39,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:39,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:31:39,343 INFO L87 Difference]: Start difference. First operand 19420 states and 26811 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-23 02:31:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:42,664 INFO L93 Difference]: Finished difference Result 45615 states and 63896 transitions. [2021-11-23 02:31:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:31:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 190 [2021-11-23 02:31:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:42,771 INFO L225 Difference]: With dead ends: 45615 [2021-11-23 02:31:42,771 INFO L226 Difference]: Without dead ends: 26678 [2021-11-23 02:31:42,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:31:42,828 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 731 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:42,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 2331 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:31:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26678 states. [2021-11-23 02:31:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26678 to 19440. [2021-11-23 02:31:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19440 states, 13189 states have (on average 1.3378573053301994) internal successors, (17645), 13610 states have internal predecessors, (17645), 4111 states have call successors, (4111), 1860 states have call predecessors, (4111), 2139 states have return successors, (5075), 4193 states have call predecessors, (5075), 4110 states have call successors, (5075) [2021-11-23 02:31:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19440 states to 19440 states and 26831 transitions. [2021-11-23 02:31:44,239 INFO L78 Accepts]: Start accepts. Automaton has 19440 states and 26831 transitions. Word has length 190 [2021-11-23 02:31:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:44,240 INFO L470 AbstractCegarLoop]: Abstraction has 19440 states and 26831 transitions. [2021-11-23 02:31:44,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-23 02:31:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 19440 states and 26831 transitions. [2021-11-23 02:31:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 02:31:44,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:44,264 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:44,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:44,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:44,491 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -979887171, now seen corresponding path program 1 times [2021-11-23 02:31:44,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:44,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241372273] [2021-11-23 02:31:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:44,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-23 02:31:44,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:44,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241372273] [2021-11-23 02:31:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241372273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:44,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573107287] [2021-11-23 02:31:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:44,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:44,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:44,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:44,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:31:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:31:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-23 02:31:45,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:31:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573107287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:45,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:31:45,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-23 02:31:45,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209183329] [2021-11-23 02:31:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:45,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:45,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:31:45,559 INFO L87 Difference]: Start difference. First operand 19440 states and 26831 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:31:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:51,567 INFO L93 Difference]: Finished difference Result 65685 states and 92673 transitions. [2021-11-23 02:31:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:31:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 213 [2021-11-23 02:31:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:51,808 INFO L225 Difference]: With dead ends: 65685 [2021-11-23 02:31:51,808 INFO L226 Difference]: Without dead ends: 65680 [2021-11-23 02:31:51,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:31:51,831 INFO L933 BasicCegarLoop]: 1058 mSDtfsCounter, 1697 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:51,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 2790 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:31:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65680 states. [2021-11-23 02:31:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65680 to 57324. [2021-11-23 02:31:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57324 states, 38799 states have (on average 1.336091136369494) internal successors, (51839), 40074 states have internal predecessors, (51839), 12137 states have call successors, (12137), 5556 states have call predecessors, (12137), 6387 states have return successors, (15011), 12365 states have call predecessors, (15011), 12136 states have call successors, (15011) [2021-11-23 02:31:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57324 states to 57324 states and 78987 transitions. [2021-11-23 02:31:55,200 INFO L78 Accepts]: Start accepts. Automaton has 57324 states and 78987 transitions. Word has length 213 [2021-11-23 02:31:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:55,201 INFO L470 AbstractCegarLoop]: Abstraction has 57324 states and 78987 transitions. [2021-11-23 02:31:55,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:31:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 57324 states and 78987 transitions. [2021-11-23 02:31:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-23 02:31:55,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:55,236 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:55,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:55,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:31:55,463 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1102493571, now seen corresponding path program 1 times [2021-11-23 02:31:55,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:55,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722702559] [2021-11-23 02:31:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:55,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:31:56,115 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:31:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:31:56,543 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:31:56,544 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:31:56,545 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:31:56,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:31:56,551 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:56,555 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:31:56,638 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,639 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,640 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,640 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,640 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,641 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,641 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,641 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-23 02:31:56,646 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == dest.base && #res.offset == dest.offset; is not ensure(true) [2021-11-23 02:31:57,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:31:57 BoogieIcfgContainer [2021-11-23 02:31:57,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:31:57,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:31:57,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:31:57,097 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:31:57,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:02" (3/4) ... [2021-11-23 02:31:57,101 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:31:57,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:31:57,102 INFO L158 Benchmark]: Toolchain (without parser) took 479842.57ms. Allocated memory was 102.8MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 60.2MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 700.2MB. Max. memory is 16.1GB. [2021-11-23 02:31:57,102 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory was 55.7MB in the beginning and 55.6MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:31:57,102 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2353.49ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 60.0MB in the beginning and 65.2MB in the end (delta: -5.2MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2021-11-23 02:31:57,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 208.55ms. Allocated memory is still 132.1MB. Free memory was 65.2MB in the beginning and 55.2MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:31:57,107 INFO L158 Benchmark]: Boogie Preprocessor took 208.92ms. Allocated memory is still 132.1MB. Free memory was 55.2MB in the beginning and 73.1MB in the end (delta: -17.8MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2021-11-23 02:31:57,108 INFO L158 Benchmark]: RCFGBuilder took 2754.32ms. Allocated memory was 132.1MB in the beginning and 207.6MB in the end (delta: 75.5MB). Free memory was 73.1MB in the beginning and 96.8MB in the end (delta: -23.7MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. [2021-11-23 02:31:57,108 INFO L158 Benchmark]: TraceAbstraction took 474302.28ms. Allocated memory was 207.6MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 96.8MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 848.3MB. Max. memory is 16.1GB. [2021-11-23 02:31:57,108 INFO L158 Benchmark]: Witness Printer took 3.99ms. Allocated memory is still 4.8GB. Free memory is still 4.1GB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:31:57,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory was 55.7MB in the beginning and 55.6MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2353.49ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 60.0MB in the beginning and 65.2MB in the end (delta: -5.2MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 208.55ms. Allocated memory is still 132.1MB. Free memory was 65.2MB in the beginning and 55.2MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 208.92ms. Allocated memory is still 132.1MB. Free memory was 55.2MB in the beginning and 73.1MB in the end (delta: -17.8MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. * RCFGBuilder took 2754.32ms. Allocated memory was 132.1MB in the beginning and 207.6MB in the end (delta: 75.5MB). Free memory was 73.1MB in the beginning and 96.8MB in the end (delta: -23.7MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. * TraceAbstraction took 474302.28ms. Allocated memory was 207.6MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 96.8MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 848.3MB. Max. memory is 16.1GB. * Witness Printer took 3.99ms. Allocated memory is still 4.8GB. Free memory is still 4.1GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == dest.base && #res.offset == dest.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 5666]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of large string literal at line 5775, overapproximation of bitwiseOr at line 5315, overapproximation of bitwiseAnd at line 6430. Possible FailurePath: [L5689] int LDV_IN_INTERRUPT = 1; [L5690] int ldv_state_variable_2 ; [L5691] struct ppp_channel *sync_ops_group0 ; [L5692] int ref_cnt ; [L5693] int ldv_state_variable_1 ; [L5694] int ldv_state_variable_0 ; [L5695] struct tty_struct *ppp_sync_ldisc_group1 ; [L5751] static struct ppp_channel_ops const sync_ops = {& ppp_sync_send, & ppp_sync_ioctl}; [L5775-L5776] static rwlock_t disc_data_lock = {{{0}, {{0U}}}, 3736018669U, 4294967295U, (void *)-1, {0, {0, 0}, "disc_data_lock", 0, 0UL}}; [L6096-L6099] static struct tty_ldisc_ops ppp_sync_ldisc = {21507, (char *)"pppsync", 0, 0, & ppp_sync_open, & ppp_sync_close, 0, 0, & ppp_sync_read, & ppp_sync_write, & ppp_synctty_ioctl, 0, 0, & ppp_sync_poll, & ppp_sync_hangup, & ppp_sync_receive, & ppp_sync_wakeup, 0, 0, 0, & __this_module, 0}; [L6637] int ldv_retval_0 ; [L6638] int ldv_retval_1 ; [L7012] Element set_impl[15] ; [L7013] int last_index = 0; [L7147] Set LDV_SKBS ; [L6661] size_t ldvarg11 ; [L6662] size_t tmp ; [L6663] struct file *ldvarg7 ; [L6664] void *tmp___0 ; [L6665] int ldvarg3 ; [L6666] int tmp___1 ; [L6667] unsigned long ldvarg0 ; [L6668] unsigned long tmp___2 ; [L6669] unsigned char *ldvarg12 ; [L6670] void *tmp___3 ; [L6671] unsigned char *ldvarg5 ; [L6672] void *tmp___4 ; [L6673] struct poll_table_struct *ldvarg6 ; [L6674] void *tmp___5 ; [L6675] size_t ldvarg8 ; [L6676] size_t tmp___6 ; [L6677] unsigned int ldvarg1 ; [L6678] unsigned int tmp___7 ; [L6679] char *ldvarg4 ; [L6680] void *tmp___8 ; [L6681] struct file *ldvarg13 ; [L6682] void *tmp___9 ; [L6683] struct file *ldvarg10 ; [L6684] void *tmp___10 ; [L6685] unsigned char *ldvarg9 ; [L6686] void *tmp___11 ; [L6687] struct file *ldvarg2 ; [L6688] void *tmp___12 ; [L6689] unsigned long ldvarg14 ; [L6690] unsigned long tmp___13 ; [L6691] struct sk_buff *ldvarg16 ; [L6692] void *tmp___14 ; [L6693] unsigned int ldvarg15 ; [L6694] unsigned int tmp___15 ; [L6695] int tmp___16 ; [L6696] int tmp___17 ; [L6697] int tmp___18 ; [L6698] int tmp___19 ; [L6700] tmp = __VERIFIER_nondet_size_t() [L6701] ldvarg11 = tmp VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg11=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0] [L6702] CALL, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=512, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=512, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6702] RET, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(512UL)={0:0}, ldvarg11=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0] [L6702] tmp___0 = ldv_zalloc(512UL) [L6703] ldvarg7 = (struct file *)tmp___0 [L6704] tmp___1 = __VERIFIER_nondet_int() [L6705] ldvarg3 = tmp___1 [L6706] tmp___2 = __VERIFIER_nondet_ulong() [L6707] ldvarg0 = tmp___2 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg11=0, ldvarg3=0, ldvarg7={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311] [L6708] CALL, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=1, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=1, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6708] RET, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(1UL)={0:0}, ldvarg0=4294967311, ldvarg11=0, ldvarg3=0, ldvarg7={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311] [L6708] tmp___3 = ldv_zalloc(1UL) [L6709] ldvarg12 = (unsigned char *)tmp___3 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg7={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}] [L6710] CALL, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=1, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=1, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6710] RET, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(1UL)={0:0}, ldvarg0=4294967311, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg7={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}] [L6710] tmp___4 = ldv_zalloc(1UL) [L6711] ldvarg5 = (unsigned char *)tmp___4 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg5={0:0}, ldvarg7={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}] [L6712] CALL, EXPR ldv_zalloc(16UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=16, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=16, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6712] RET, EXPR ldv_zalloc(16UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(16UL)={0:0}, ldvarg0=4294967311, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg5={0:0}, ldvarg7={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}] [L6712] tmp___5 = ldv_zalloc(16UL) [L6713] ldvarg6 = (struct poll_table_struct *)tmp___5 [L6714] tmp___6 = __VERIFIER_nondet_size_t() [L6715] ldvarg8 = tmp___6 [L6716] tmp___7 = __VERIFIER_nondet_uint() [L6717] ldvarg1 = tmp___7 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8] [L6718] CALL, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=1, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=1, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6718] RET, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(1UL)={0:0}, ldvarg0=4294967311, ldvarg1=8, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8] [L6718] tmp___8 = ldv_zalloc(1UL) [L6719] ldvarg4 = (char *)tmp___8 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}] [L6720] CALL, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=512, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=512, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6720] RET, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(512UL)={0:0}, ldvarg0=4294967311, ldvarg1=8, ldvarg11=0, ldvarg12={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}] [L6720] tmp___9 = ldv_zalloc(512UL) [L6721] ldvarg13 = (struct file *)tmp___9 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6722] CALL, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=512, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=512, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6722] RET, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(512UL)={0:0}, ldvarg0=4294967311, ldvarg1=8, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6722] tmp___10 = ldv_zalloc(512UL) [L6723] ldvarg10 = (struct file *)tmp___10 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6724] CALL, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=1, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=1, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6724] RET, EXPR ldv_zalloc(1UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(1UL)={0:0}, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6724] tmp___11 = ldv_zalloc(1UL) [L6725] ldvarg9 = (unsigned char *)tmp___11 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6726] CALL, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=512, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=512, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6726] RET, EXPR ldv_zalloc(512UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(512UL)={0:0}, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6726] tmp___12 = ldv_zalloc(512UL) [L6727] ldvarg2 = (struct file *)tmp___12 [L6728] tmp___13 = __VERIFIER_nondet_ulong() [L6729] ldvarg14 = tmp___13 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6730] CALL, EXPR ldv_zalloc(232UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=232, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=232, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6730] RET, EXPR ldv_zalloc(232UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=0, ldv_state_variable_1=0, ldv_state_variable_2=0, ldv_zalloc(232UL)={0:0}, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6730] tmp___14 = ldv_zalloc(232UL) [L6731] ldvarg16 = (struct sk_buff *)tmp___14 [L6732] tmp___15 = __VERIFIER_nondet_uint() [L6733] ldvarg15 = tmp___15 [L6734] CALL ldv_initialize() [L7166] CALL ldv_set_init(LDV_SKBS) [L7018] set = set_impl [L7019] last_index = 0 [L7166] RET ldv_set_init(LDV_SKBS) [L6734] RET ldv_initialize() [L6735] ldv_state_variable_1 = 0 [L6736] ref_cnt = 0 [L6737] ldv_state_variable_0 = 1 [L6738] ldv_state_variable_2 = 0 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=1, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6740] tmp___16 = __VERIFIER_nondet_int() [L6742] case 0: [L6838] case 1: VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=1, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=1, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6839] COND TRUE ldv_state_variable_0 != 0 [L6840] tmp___18 = __VERIFIER_nondet_int() [L6842] case 0: [L6850] case 1: VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=1, ldv_state_variable_1=0, ldv_state_variable_2=0, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=1, tmp___18=1, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6851] COND TRUE ldv_state_variable_0 == 1 [L6852] CALL, EXPR ppp_sync_init() [L6102] int err ; [L6104] CALL, EXPR tty_register_ldisc(14, & ppp_sync_ldisc) [L7358] return __VERIFIER_nondet_int(); [L6104] RET, EXPR tty_register_ldisc(14, & ppp_sync_ldisc) [L6104] err = tty_register_ldisc(14, & ppp_sync_ldisc) [L6105] COND FALSE !(err != 0) [L6109] return (err); [L6852] RET, EXPR ppp_sync_init() [L6852] ldv_retval_1 = ppp_sync_init() [L6853] COND TRUE ldv_retval_1 == 0 [L6854] ldv_state_variable_0 = 3 [L6855] ldv_state_variable_2 = 1 [L6856] CALL ldv_initialize_ppp_channel_ops_2() [L6643] void *tmp ; VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=0, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6645] CALL, EXPR ldv_zalloc(40UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=0, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=40, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=0, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=40, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6645] RET, EXPR ldv_zalloc(40UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=0, ldv_state_variable_2=1, ldv_zalloc(40UL)={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6645] tmp = ldv_zalloc(40UL) [L6646] sync_ops_group0 = (struct ppp_channel *)tmp [L6856] RET ldv_initialize_ppp_channel_ops_2() [L6857] ldv_state_variable_1 = 1 [L6858] CALL ldv_target_type_1() [L6652] void *tmp ; VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6654] CALL, EXPR ldv_zalloc(1752UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND TRUE tmp___0 != 0 [L5637] return ((void *)0); VAL [\old(size)=1752, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=1752, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L6654] RET, EXPR ldv_zalloc(1752UL) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldv_zalloc(1752UL)={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6654] tmp = ldv_zalloc(1752UL) [L6655] ppp_sync_ldisc_group1 = (struct tty_struct *)tmp [L6858] RET ldv_target_type_1() [L6861] COND FALSE !(ldv_retval_1 != 0) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=1, tmp___18=1, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6740] tmp___16 = __VERIFIER_nondet_int() [L6742] case 0: [L6838] case 1: [L6876] case 2: VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=2, tmp___18=1, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6877] COND TRUE ldv_state_variable_2 != 0 [L6878] tmp___19 = __VERIFIER_nondet_int() [L6880] case 0: VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=2, tmp___18=1, tmp___19=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6881] COND TRUE ldv_state_variable_2 == 1 [L6882] CALL ppp_sync_send(sync_ops_group0, ldvarg16) [L6439] struct syncppp *ap ; [L6440] int tmp ; [L6442] EXPR chan->private [L6442] ap = (struct syncppp *)chan->private [L6443] CALL ppp_sync_push(ap) VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6461] int sent ; [L6462] int done ; [L6463] struct tty_struct *tty ; [L6464] int tty_stuffed ; [L6465] int tmp ; [L6466] int tmp___0 ; [L6467] int tmp___1 ; [L6468] int tmp___2 ; [L6470] done = 0 [L6471] EXPR ap->tty [L6471] tty = ap->tty [L6472] tty_stuffed = 0 VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, disc_data_lock={22:0}, done=0, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tty={4294967307:4294967312}, tty_stuffed=0] [L6473] CALL, EXPR spin_trylock_bh(& ap->xmit_lock) VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5417] int tmp ; [L5419] CALL, EXPR _raw_spin_trylock_bh(& lock->ldv_6338.rlock) [L7268] return __VERIFIER_nondet_int(); [L5419] RET, EXPR _raw_spin_trylock_bh(& lock->ldv_6338.rlock) [L5419] tmp = _raw_spin_trylock_bh(& lock->ldv_6338.rlock) [L5420] return (tmp); [L6473] RET, EXPR spin_trylock_bh(& ap->xmit_lock) VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, disc_data_lock={22:0}, done=0, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, spin_trylock_bh(& ap->xmit_lock)=0, sync_ops={21:0}, sync_ops_group0={0:0}, tty={4294967307:4294967312}, tty_stuffed=0] [L6473] tmp = spin_trylock_bh(& ap->xmit_lock) [L6474] COND TRUE tmp == 0 [L6475] return (0); VAL [\old(last_index)=0, \result=0, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, disc_data_lock={22:0}, done=0, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tty={4294967307:4294967312}, tty_stuffed=0] [L6443] RET ppp_sync_push(ap) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, chan={0:0}, chan={0:0}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ppp_sync_push(ap)=0, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6444] CALL, EXPR test_and_set_bit(1L, (unsigned long volatile *)(& ap->xmit_flags)) VAL [\old(nr)=1, __this_module={4294967299:4294967316}, addr={4294967297:136}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5290] char c ; [L5294] return ((int )((signed char )c) != 0); [L6444] RET, EXPR test_and_set_bit(1L, (unsigned long volatile *)(& ap->xmit_flags)) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, chan={0:0}, chan={0:0}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, test_and_set_bit(1L, (unsigned long volatile *)(& ap->xmit_flags))=0] [L6444] tmp = test_and_set_bit(1L, (unsigned long volatile *)(& ap->xmit_flags)) [L6445] COND FALSE !(tmp != 0) [L6449] CALL, EXPR ppp_sync_txmunge(ap, skb) [L6390] int proto ; [L6391] unsigned char *data ; [L6392] int islcp ; [L6393] u16 tmp ; [L6394] struct sk_buff *npkt ; [L6395] struct sk_buff *tmp___0 ; [L6396] unsigned char *tmp___1 ; [L6397] unsigned int tmp___2 ; [L6399] EXPR skb->data [L6399] data = skb->data [L6400] CALL, EXPR get_unaligned_be16((void const *)data) [L5737] __u16 tmp ; [L5739] CALL, EXPR __be16_to_cpup((__be16 const *)p) [L5328] __u16 tmp ; [L5330] CALL, EXPR __swab16p(p) [L5320] __u16 tmp ; [L5322] EXPR \read(*p) [L5322] CALL, EXPR __fswab16((int )*p) [L5315] return ((__u16 )((int )((short )((int )val << 8)) | (int )((short )((int )val >> 8)))); [L5322] RET, EXPR __fswab16((int )*p) [L5322] tmp = __fswab16((int )*p) [L5323] return (tmp); [L5330] RET, EXPR __swab16p(p) [L5330] tmp = __swab16p(p) [L5331] return (tmp); [L5739] RET, EXPR __be16_to_cpup((__be16 const *)p) [L5739] tmp = __be16_to_cpup((__be16 const *)p) [L5740] return (tmp); [L6400] RET, EXPR get_unaligned_be16((void const *)data) [L6400] tmp = get_unaligned_be16((void const *)data) [L6401] proto = (int )tmp [L6402] EXPR proto == 49185 && (unsigned int )*(data + 2UL) != 0U [L6402] EXPR data + 2UL [L6402] EXPR proto == 49185 && (unsigned int )*(data + 2UL) != 0U [L6402] EXPR (proto == 49185 && (unsigned int )*(data + 2UL) != 0U) && (unsigned int )*(data + 2UL) <= 7U [L6402] EXPR data + 2UL [L6402] EXPR (proto == 49185 && (unsigned int )*(data + 2UL) != 0U) && (unsigned int )*(data + 2UL) <= 7U [L6402] islcp = (proto == 49185 && (unsigned int )*(data + 2UL) != 0U) && (unsigned int )*(data + 2UL) <= 7U [L6403] EXPR \read(*data) [L6403] EXPR (unsigned int )*data == 0U && (int )ap->flags & 1 VAL [(unsigned int )*data == 0U && (int )ap->flags & 1=0, \read(*data)=-65535, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, ap->flags=4294967310, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185] [L6403] COND FALSE !(((unsigned int )*data == 0U && (int )ap->flags & 1) && islcp == 0) [L6407] EXPR ap->flags VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, ap->flags=4294967310, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185] [L6407] COND TRUE (ap->flags & 2U) == 0U || islcp != 0 [L6408] CALL, EXPR skb_headroom((struct sk_buff const *)skb) [L5565] EXPR skb->data [L5565] EXPR skb->head [L5565] return ((unsigned int )((long )skb->data) - (unsigned int )((long )skb->head)); [L6408] RET, EXPR skb_headroom((struct sk_buff const *)skb) [L6408] tmp___2 = skb_headroom((struct sk_buff const *)skb) [L6409] COND TRUE tmp___2 <= 1U [L6410] EXPR skb->len VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, skb->len=0, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___2=0] [L6410] CALL, EXPR ldv_dev_alloc_skb_15(skb->len + 2U) VAL [\old(last_index)=0, \old(length)=2, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6970] struct sk_buff *tmp ; VAL [\old(last_index)=0, \old(length)=2, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, length=2, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6972] CALL, EXPR ldv_skb_alloc() VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7150] void *skb ; [L7151] void *tmp___7 ; VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7153] CALL, EXPR ldv_zalloc(sizeof(struct sk_buff___0 )) VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5631] void *p ; [L5632] void *tmp ; [L5633] int tmp___0 ; [L5635] tmp___0 = __VERIFIER_nondet_int() [L5636] COND FALSE !(tmp___0 != 0) [L5639] EXPR, FCALL calloc(1UL, size) [L5639] tmp = calloc(1UL, size) [L5640] p = tmp VAL [\old(last_index)=0, \old(size)=248, __this_module={4294967299:4294967316}, calloc(1UL, size)={-18446744073709551617:0}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, p={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=248, sync_ops={21:0}, sync_ops_group0={0:0}, tmp={-18446744073709551617:0}, tmp___0=0] [L5641] CALL assume_abort_if_not((unsigned long )p != (unsigned long )((void *)0)) VAL [\old(cond)=1, \old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5610] COND FALSE !(!cond) [L5641] RET assume_abort_if_not((unsigned long )p != (unsigned long )((void *)0)) VAL [\old(last_index)=0, \old(size)=248, __this_module={4294967299:4294967316}, calloc(1UL, size)={-18446744073709551617:0}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, p={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=248, sync_ops={21:0}, sync_ops_group0={0:0}, tmp={-18446744073709551617:0}, tmp___0=0] [L5642] return (p); VAL [\old(last_index)=0, \old(size)=248, \result={-18446744073709551617:0}, __this_module={4294967299:4294967316}, calloc(1UL, size)={-18446744073709551617:0}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, p={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=248, sync_ops={21:0}, sync_ops_group0={0:0}, tmp={-18446744073709551617:0}, tmp___0=0] [L7153] RET, EXPR ldv_zalloc(sizeof(struct sk_buff___0 )) VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldv_zalloc(sizeof(struct sk_buff___0 ))={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7153] tmp___7 = ldv_zalloc(sizeof(struct sk_buff___0 )) [L7154] skb = (struct sk_buff___0 *)tmp___7 VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___7={-18446744073709551617:0}] [L7155] COND FALSE !(! skb) [L7158] CALL ldv_set_add(LDV_SKBS, skb) [L7026] int i ; [L7028] i = 0 VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, e={-18446744073709551617:0}, e={-18446744073709551617:0}, i=0, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7029] COND TRUE 1 VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, e={-18446744073709551617:0}, e={-18446744073709551617:0}, i=0, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7030] COND FALSE !(i < last_index) VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, e={-18446744073709551617:0}, e={-18446744073709551617:0}, i=0, last_index=0, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7040] COND TRUE last_index < 15 [L7041] set_impl[last_index] = e [L7042] last_index = last_index + 1 VAL [\old(last_index)=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, e={-18446744073709551617:0}, e={-18446744073709551617:0}, i=0, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7158] RET ldv_set_add(LDV_SKBS, skb) [L7159] return (skb); VAL [\old(last_index)=0, \result={-18446744073709551617:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___7={-18446744073709551617:0}] [L6972] RET, EXPR ldv_skb_alloc() VAL [\old(last_index)=0, \old(length)=2, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, ldv_skb_alloc()={-18446744073709551617:0}, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, length=2, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6972] tmp = ldv_skb_alloc() [L6973] return (tmp); [L6410] RET, EXPR ldv_dev_alloc_skb_15(skb->len + 2U) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, ldv_dev_alloc_skb_15(skb->len + 2U)={-18446744073709551617:0}, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, skb->len=0, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___2=0] [L6410] tmp___0 = ldv_dev_alloc_skb_15(skb->len + 2U) [L6411] npkt = tmp___0 VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___2=0] [L6412] COND FALSE !((unsigned long )npkt == (unsigned long )((struct sk_buff *)0)) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___2=0] [L6417] CALL skb_reserve(npkt, 2) VAL [\old(len)=2, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5579] EXPR skb->data [L5579] skb->data = skb->data + (unsigned long )len [L5580] EXPR skb->tail [L5580] skb->tail = skb->tail + (sk_buff_data_t )len [L6417] RET skb_reserve(npkt, 2) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___2=0] [L6418] EXPR skb->len VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, skb->len=0, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___2=0] [L6418] CALL, EXPR skb_put(npkt, skb->len) VAL [\old(arg1)=0, __this_module={4294967299:4294967316}, arg0={-18446744073709551617:0}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7333] EXPR arg0->data [L7333] EXPR arg0->tail [L7333] unsigned char *ret_val = arg0->data + arg0->tail; [L7334] EXPR arg0->tail [L7334] arg0->tail += arg1 [L7335] return ret_val; [L6418] RET, EXPR skb_put(npkt, skb->len) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, skb->len=0, skb_put(npkt, skb->len)={-18446744073709551617:234}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___2=0] [L6418] tmp___1 = skb_put(npkt, skb->len) [L6419] EXPR skb->len [L6419] CALL skb_copy_from_linear_data((struct sk_buff const *)skb, (void *)tmp___1, skb->len) [L5592] size_t __len ; [L5593] void *__ret ; [L5595] __len = (size_t )len [L5596] EXPR skb->data VAL [\old(len)=0, __len=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, len=0, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, skb->data={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, to={-18446744073709551617:234}, to={-18446744073709551617:234}] [L5596] EXPR, FCALL memcpy(to, (void const *)skb->data, __len) VAL [\old(len)=0, __len=0, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, len=0, memcpy(to, (void const *)skb->data, __len)={-18446744073709551617:234}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, skb->data={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, to={-18446744073709551617:234}, to={-18446744073709551617:234}] [L5596] __ret = memcpy(to, (void const *)skb->data, __len) [L6419] RET skb_copy_from_linear_data((struct sk_buff const *)skb, (void *)tmp___1, skb->len) [L6420] CALL ldv_consume_skb_17(skb) [L6986] CALL ldv_skb_free(ldv_func_arg1) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7173] CALL ldv_set_remove(LDV_SKBS, skb) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, e={0:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7051] int i ; [L7052] int deleted_index ; [L7054] deleted_index = -1 [L7055] i = 0 VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=0, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7056] COND TRUE 1 VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=0, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7057] COND TRUE i < last_index [L7061] EXPR set_impl[i] VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=0, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, set_impl[i]={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7061] COND FALSE !((unsigned long )set_impl[i] == (unsigned long )e) [L7066] i = i + 1 VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7056] COND TRUE 1 VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7057] COND FALSE !(i < last_index) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7068] COND FALSE !(deleted_index != -1) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, deleted_index=-1, disc_data_lock={22:0}, e={0:0}, e={0:0}, i=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set={0:0}, set={0:0}, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7173] RET ldv_set_remove(LDV_SKBS, skb) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6986] RET ldv_skb_free(ldv_func_arg1) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, ldv_func_arg1={0:0}, ldv_func_arg1={0:0}, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6420] RET ldv_consume_skb_17(skb) [L6421] skb = npkt VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={-18446744073709551617:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___1={-18446744073709551617:234}, tmp___2=0] [L6424] CALL skb_push(skb, 2U) VAL [\old(arg1)=2, __this_module={4294967299:4294967316}, arg0={-18446744073709551617:0}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7330] CALL, EXPR ldv_malloc(sizeof(unsigned char)) VAL [\old(size)=1, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5614] void *p ; [L5615] void *tmp ; [L5616] int tmp___0 ; [L5618] tmp___0 = __VERIFIER_nondet_int() [L5619] COND TRUE tmp___0 != 0 [L5620] return ((void *)0); VAL [\old(size)=1, \result={0:0}, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, size=1, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___0=1] [L7330] RET, EXPR ldv_malloc(sizeof(unsigned char)) VAL [\old(arg1)=2, __this_module={4294967299:4294967316}, arg0={-18446744073709551617:0}, arg0={-18446744073709551617:0}, arg1=2, disc_data_lock={22:0}, last_index=1, LDV_IN_INTERRUPT=1, ldv_malloc(sizeof(unsigned char))={0:0}, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L7330] return ldv_malloc(sizeof(unsigned char)); [L6424] RET skb_push(skb, 2U) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={-18446744073709551617:0}, skb={0:0}, skb_push(skb, 2U)={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___1={-18446744073709551617:234}, tmp___2=0] [L6425] EXPR skb->data [L6425] *(skb->data) = 255U [L6426] EXPR skb->data [L6426] *(skb->data + 1UL) = 3U [L6429] ap->last_xmit = jiffies [L6430] (unsigned long )skb != (unsigned long )((struct sk_buff *)0) && (ap->flags & 262144U) != 0U [L6430] EXPR ap->flags [L6430] (unsigned long )skb != (unsigned long )((struct sk_buff *)0) && (ap->flags & 262144U) != 0U VAL [(unsigned long )skb != (unsigned long )((struct sk_buff *)0) && (ap->flags & 262144U) != 0U=0, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, ap->flags=4294967310, data={0:0}, disc_data_lock={22:0}, islcp=1, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___1={-18446744073709551617:234}, tmp___2=0] [L6430] COND FALSE !((unsigned long )skb != (unsigned long )((struct sk_buff *)0) && (ap->flags & 262144U) != 0U) [L6434] return (skb); VAL [\result={-18446744073709551617:0}, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, data={0:0}, disc_data_lock={22:0}, islcp=1, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, npkt={-18446744073709551617:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, proto=49185, ref_cnt=0, set_impl={24:0}, skb={-18446744073709551617:0}, skb={0:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=49185, tmp___0={-18446744073709551617:0}, tmp___1={-18446744073709551617:234}, tmp___2=0] [L6449] RET, EXPR ppp_sync_txmunge(ap, skb) [L6449] skb = ppp_sync_txmunge(ap, skb) [L6450] COND TRUE (unsigned long )skb != (unsigned long )((struct sk_buff *)0) [L6451] ap->tpkt = skb VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, chan={0:0}, chan={0:0}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0] [L6455] CALL ppp_sync_push(ap) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L6461] int sent ; [L6462] int done ; [L6463] struct tty_struct *tty ; [L6464] int tty_stuffed ; [L6465] int tmp ; [L6466] int tmp___0 ; [L6467] int tmp___1 ; [L6468] int tmp___2 ; [L6470] done = 0 [L6471] EXPR ap->tty [L6471] tty = ap->tty [L6472] tty_stuffed = 0 VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, disc_data_lock={22:0}, done=0, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tty={4294967308:4294967313}, tty_stuffed=0] [L6473] CALL, EXPR spin_trylock_bh(& ap->xmit_lock) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5417] int tmp ; [L5419] CALL, EXPR _raw_spin_trylock_bh(& lock->ldv_6338.rlock) [L7268] return __VERIFIER_nondet_int(); [L5419] RET, EXPR _raw_spin_trylock_bh(& lock->ldv_6338.rlock) [L5419] tmp = _raw_spin_trylock_bh(& lock->ldv_6338.rlock) [L5420] return (tmp); [L6473] RET, EXPR spin_trylock_bh(& ap->xmit_lock) VAL [\old(last_index)=1, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, disc_data_lock={22:0}, done=0, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, spin_trylock_bh(& ap->xmit_lock)=0, sync_ops={21:0}, sync_ops_group0={0:0}, tty={4294967308:4294967313}, tty_stuffed=0] [L6473] tmp = spin_trylock_bh(& ap->xmit_lock) [L6474] COND TRUE tmp == 0 [L6475] return (0); VAL [\old(last_index)=1, \result=0, __this_module={4294967299:4294967316}, ap={4294967297:-20}, ap={4294967297:-20}, disc_data_lock={22:0}, done=0, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tty={4294967308:4294967313}, tty_stuffed=0] [L6455] RET ppp_sync_push(ap) VAL [__this_module={4294967299:4294967316}, ap={4294967297:-20}, chan={0:0}, chan={0:0}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ppp_sync_push(ap)=0, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0] [L6456] return (1); VAL [\result=1, __this_module={4294967299:4294967316}, ap={4294967297:-20}, chan={0:0}, chan={0:0}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, skb={0:0}, skb={-18446744073709551617:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0] [L6882] RET ppp_sync_send(sync_ops_group0, ldvarg16) [L6883] ldv_state_variable_2 = 1 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=2, tmp___18=1, tmp___19=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6740] tmp___16 = __VERIFIER_nondet_int() [L6742] case 0: [L6838] case 1: VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=1, tmp___18=1, tmp___19=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6839] COND TRUE ldv_state_variable_0 != 0 [L6840] tmp___18 = __VERIFIER_nondet_int() [L6842] case 0: VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=3, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=1, tmp___18=0, tmp___19=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6843] COND TRUE ldv_state_variable_0 == 3 && ref_cnt == 0 [L6844] CALL ppp_sync_cleanup() [L6627] int tmp ; [L6629] CALL, EXPR tty_unregister_ldisc(14) [L7366] return __VERIFIER_nondet_int(); [L6629] RET, EXPR tty_unregister_ldisc(14) [L6629] tmp = tty_unregister_ldisc(14) [L6630] COND TRUE tmp != 0 [L6844] RET ppp_sync_cleanup() [L6845] ldv_state_variable_0 = 2 VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=2, ldv_state_variable_1=1, ldv_state_variable_2=1, ldvarg0=4294967311, ldvarg1=8, ldvarg10={0:0}, ldvarg11=0, ldvarg12={0:0}, ldvarg13={0:0}, ldvarg14=4294967309, ldvarg15=9, ldvarg16={0:0}, ldvarg2={0:0}, ldvarg3=0, ldvarg4={0:0}, ldvarg5={0:0}, ldvarg6={0:0}, ldvarg7={0:0}, ldvarg8=0, ldvarg9={0:0}, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp=0, tmp___0={0:0}, tmp___1=0, tmp___10={0:0}, tmp___11={0:0}, tmp___12={0:0}, tmp___13=4294967309, tmp___14={0:0}, tmp___15=9, tmp___16=1, tmp___18=0, tmp___19=0, tmp___2=4294967311, tmp___3={0:0}, tmp___4={0:0}, tmp___5={0:0}, tmp___6=0, tmp___7=8, tmp___8={0:0}, tmp___9={0:0}] [L6907] CALL ldv_check_final_state() [L7217] int tmp___7 ; [L7219] CALL, EXPR ldv_set_is_empty(LDV_SKBS) [L7108] return (last_index == 0); [L7219] RET, EXPR ldv_set_is_empty(LDV_SKBS) [L7219] tmp___7 = ldv_set_is_empty(LDV_SKBS) [L7220] COND FALSE !(\read(tmp___7)) VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=2, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}, tmp___7=0] [L7222] CALL ldv_error() VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=2, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] [L5666] reach_error() VAL [__this_module={4294967299:4294967316}, disc_data_lock={22:0}, jiffies=4294967296, last_index=1, LDV_IN_INTERRUPT=1, ldv_retval_0=0, ldv_retval_1=0, LDV_SKBS={0:0}, ldv_state_variable_0=2, ldv_state_variable_1=1, ldv_state_variable_2=1, ppp_sync_ldisc={23:0}, ppp_sync_ldisc_group1={0:0}, ref_cnt=0, set_impl={24:0}, sync_ops={21:0}, sync_ops_group0={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 447 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 473.6s, OverallIterations: 17, TraceHistogramMax: 14, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.4s, AutomataDifference: 235.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14920 SdHoareTripleChecker+Valid, 125.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14262 mSDsluCounter, 63312 SdHoareTripleChecker+Invalid, 117.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2496 IncrementalHoareTripleChecker+Unchecked, 59228 mSDsCounter, 5116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44853 IncrementalHoareTripleChecker+Invalid, 52465 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5116 mSolverCounterUnsat, 11497 mSDtfsCounter, 44853 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1996 GetRequests, 1597 SyntacticMatches, 7 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18462 ImplicationChecksByTransitivity, 231.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57324occurred in iteration=16, InterpolantAutomatonStates: 217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 39091 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 3678 NumberOfCodeBlocks, 3678 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 3795 ConstructedInterpolants, 0 QuantifiedInterpolants, 7913 SizeOfPredicates, 57 NumberOfNonLiveVariables, 8695 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 24 InterpolantComputations, 14 PerfectInterpolantSequences, 7495/7603 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 37.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 136, DAG_INTERPRETER_EARLY_EXITS: 4, TOOLS_POST_APPLICATIONS: 140, TOOLS_POST_TIME: 8.3s, TOOLS_POST_CALL_APPLICATIONS: 83, TOOLS_POST_CALL_TIME: 9.2s, TOOLS_POST_RETURN_APPLICATIONS: 62, TOOLS_POST_RETURN_TIME: 12.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 284, TOOLS_QUANTIFIERELIM_TIME: 29.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 1.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 354, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 85, DOMAIN_JOIN_TIME: 6.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 136, DOMAIN_ISBOTTOM_TIME: 0.5s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 62, CALL_SUMMARIZER_CACHE_MISSES: 9, CALL_SUMMARIZER_OVERALL_TIME: 0.5s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.7s, DAG_COMPRESSION_PROCESSED_NODES: 21315, DAG_COMPRESSION_RETAINED_NODES: 403, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 02:31:57,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V --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 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:31:59,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:31:59,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:31:59,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:31:59,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:31:59,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:31:59,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:31:59,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:31:59,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:31:59,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:31:59,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:31:59,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:31:59,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:31:59,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:31:59,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:31:59,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:31:59,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:31:59,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:31:59,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:31:59,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:31:59,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:31:59,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:31:59,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:31:59,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:31:59,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:31:59,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:31:59,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:31:59,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:31:59,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:31:59,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:31:59,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:31:59,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:31:59,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:31:59,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:31:59,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:31:59,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:31:59,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:31:59,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:31:59,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:31:59,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:31:59,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:31:59,994 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-23 02:32:00,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:32:00,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:32:00,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:32:00,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:32:00,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:32:00,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:32:00,044 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:32:00,044 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:32:00,044 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:32:00,044 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:32:00,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:32:00,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:32:00,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:32:00,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:32:00,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:32:00,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:32:00,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:32:00,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:32:00,049 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:32:00,049 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:32:00,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:32:00,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:32:00,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:32:00,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:32:00,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:32:00,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:32:00,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:00,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:32:00,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:32:00,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:32:00,052 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:32:00,052 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:32:00,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:32:00,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:32:00,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:32:00,054 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2021-11-23 02:32:00,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:32:00,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:32:00,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:32:00,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:32:00,477 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:32:00,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-23 02:32:00,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/93c7d3c12/fae0e3198db24fa2a407426cdd0e7316/FLAGb957f27b4 [2021-11-23 02:32:01,484 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:32:01,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-23 02:32:01,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/93c7d3c12/fae0e3198db24fa2a407426cdd0e7316/FLAGb957f27b4 [2021-11-23 02:32:02,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/data/93c7d3c12/fae0e3198db24fa2a407426cdd0e7316 [2021-11-23 02:32:02,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:32:02,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:32:02,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:02,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:32:02,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:32:02,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:02" (1/1) ... [2021-11-23 02:32:02,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48feb2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:02, skipping insertion in model container [2021-11-23 02:32:02,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:02" (1/1) ... [2021-11-23 02:32:02,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:32:02,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:32:03,222 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-23 02:32:03,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:03,641 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:32:03,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:32:03,851 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-23 02:32:03,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:03,963 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:32:04,209 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_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-23 02:32:04,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:04,524 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:32:04,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04 WrapperNode [2021-11-23 02:32:04,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:04,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:04,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:32:04,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:32:04,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,733 INFO L137 Inliner]: procedures = 190, calls = 448, calls flagged for inlining = 92, calls inlined = 85, statements flattened = 1716 [2021-11-23 02:32:04,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:04,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:32:04,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:32:04,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:32:04,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:32:04,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:32:04,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:32:04,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:32:04,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (1/1) ... [2021-11-23 02:32:04,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:05,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:32:05,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:32:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:32:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:32:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_15 [2021-11-23 02:32:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_15 [2021-11-23 02:32:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_poll [2021-11-23 02:32:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_poll [2021-11-23 02:32:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 02:32:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 02:32:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-23 02:32:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-23 02:32:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:32:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:32:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-23 02:32:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:32:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:32:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:32:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-23 02:32:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-23 02:32:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-11-23 02:32:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-11-23 02:32:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:32:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:32:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-23 02:32:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-23 02:32:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:32:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:32:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure spin_trylock_bh [2021-11-23 02:32:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_trylock_bh [2021-11-23 02:32:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:32:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:32:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-23 02:32:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-23 02:32:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-23 02:32:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-23 02:32:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_synctty_ioctl [2021-11-23 02:32:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_synctty_ioctl [2021-11-23 02:32:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:32:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:32:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:32:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:32:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-23 02:32:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-23 02:32:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_close [2021-11-23 02:32:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_close [2021-11-23 02:32:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-23 02:32:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-23 02:32:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-23 02:32:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-23 02:32:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:32:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:32:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:32:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:32:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_print_buffer [2021-11-23 02:32:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_print_buffer [2021-11-23 02:32:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:32:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:32:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:32:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:32:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:32:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:32:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:32:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:32:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:32:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:32:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-23 02:32:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-23 02:32:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-23 02:32:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-23 02:32:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-23 02:32:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-23 02:32:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-23 02:32:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:32:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-23 02:32:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-23 02:32:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-23 02:32:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-23 02:32:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure sp_put [2021-11-23 02:32:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_put [2021-11-23 02:32:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 02:32:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 02:32:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:32:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:32:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:32:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-11-23 02:32:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-11-23 02:32:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_hangup [2021-11-23 02:32:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_hangup [2021-11-23 02:32:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:32:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:32:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:32:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 02:32:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-23 02:32:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-23 02:32:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-23 02:32:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure sp_get [2021-11-23 02:32:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_get [2021-11-23 02:32:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:32:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:32:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-23 02:32:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-23 02:32:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-23 02:32:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:32:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:32:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:32:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:32:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:32:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:32:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_push [2021-11-23 02:32:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_push [2021-11-23 02:32:05,622 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:32:05,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:32:05,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:32:12,567 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:32:12,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:32:12,593 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:32:12,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:12 BoogieIcfgContainer [2021-11-23 02:32:12,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:32:12,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:32:12,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:32:12,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:32:12,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:02" (1/3) ... [2021-11-23 02:32:12,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6421b858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:12, skipping insertion in model container [2021-11-23 02:32:12,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:04" (2/3) ... [2021-11-23 02:32:12,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6421b858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:12, skipping insertion in model container [2021-11-23 02:32:12,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:12" (3/3) ... [2021-11-23 02:32:12,616 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-23 02:32:12,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:32:12,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:32:12,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:32:12,701 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 [2021-11-23 02:32:12,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:32:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 644 states, 483 states have (on average 1.391304347826087) internal successors, (672), 499 states have internal predecessors, (672), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2021-11-23 02:32:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:32:12,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:12,776 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:12,776 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1758611482, now seen corresponding path program 1 times [2021-11-23 02:32:12,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:12,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255144657] [2021-11-23 02:32:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:12,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:12,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:12,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:32:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:32:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:13,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:13,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255144657] [2021-11-23 02:32:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255144657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:13,848 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:13,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:32:13,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879659851] [2021-11-23 02:32:13,852 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:13,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:32:13,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:32:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:32:13,911 INFO L87 Difference]: Start difference. First operand has 644 states, 483 states have (on average 1.391304347826087) internal successors, (672), 499 states have internal predecessors, (672), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:32:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:15,859 INFO L93 Difference]: Finished difference Result 2470 states and 3594 transitions. [2021-11-23 02:32:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:32:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 78 [2021-11-23 02:32:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:15,893 INFO L225 Difference]: With dead ends: 2470 [2021-11-23 02:32:15,893 INFO L226 Difference]: Without dead ends: 1810 [2021-11-23 02:32:15,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:32:15,912 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 2314 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:15,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 2589 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:32:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-11-23 02:32:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1810. [2021-11-23 02:32:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1373 states have (on average 1.3765477057538238) internal successors, (1890), 1403 states have internal predecessors, (1890), 322 states have call successors, (322), 115 states have call predecessors, (322), 114 states have return successors, (321), 315 states have call predecessors, (321), 321 states have call successors, (321) [2021-11-23 02:32:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2533 transitions. [2021-11-23 02:32:16,100 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2533 transitions. Word has length 78 [2021-11-23 02:32:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:16,101 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2533 transitions. [2021-11-23 02:32:16,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:32:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2533 transitions. [2021-11-23 02:32:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:32:16,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:16,108 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:16,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:16,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:16,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash -152487068, now seen corresponding path program 1 times [2021-11-23 02:32:16,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:16,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144691413] [2021-11-23 02:32:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:16,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:16,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:16,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:32:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:32:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:17,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144691413] [2021-11-23 02:32:17,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144691413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:17,324 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:17,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-23 02:32:17,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305609728] [2021-11-23 02:32:17,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:17,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:32:17,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:32:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:32:17,328 INFO L87 Difference]: Start difference. First operand 1810 states and 2533 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:32:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:17,773 INFO L93 Difference]: Finished difference Result 5379 states and 7598 transitions. [2021-11-23 02:32:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:32:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2021-11-23 02:32:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:17,809 INFO L225 Difference]: With dead ends: 5379 [2021-11-23 02:32:17,809 INFO L226 Difference]: Without dead ends: 3587 [2021-11-23 02:32:17,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:32:17,823 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 864 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 4806 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:17,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 4806 Invalid, 54 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:32:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-11-23 02:32:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3575. [2021-11-23 02:32:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 2713 states have (on average 1.3774419461850351) internal successors, (3737), 2773 states have internal predecessors, (3737), 633 states have call successors, (633), 229 states have call predecessors, (633), 228 states have return successors, (689), 620 states have call predecessors, (689), 632 states have call successors, (689) [2021-11-23 02:32:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 5059 transitions. [2021-11-23 02:32:18,053 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 5059 transitions. Word has length 82 [2021-11-23 02:32:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:18,056 INFO L470 AbstractCegarLoop]: Abstraction has 3575 states and 5059 transitions. [2021-11-23 02:32:18,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:32:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 5059 transitions. [2021-11-23 02:32:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 02:32:18,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:18,074 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:18,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:18,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:18,287 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -950375967, now seen corresponding path program 1 times [2021-11-23 02:32:18,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53677254] [2021-11-23 02:32:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:18,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:18,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:32:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:32:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:19,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:19,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53677254] [2021-11-23 02:32:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53677254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:19,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:19,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:32:19,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40646945] [2021-11-23 02:32:19,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:19,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:19,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:19,379 INFO L87 Difference]: Start difference. First operand 3575 states and 5059 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:32:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:19,766 INFO L93 Difference]: Finished difference Result 9097 states and 12818 transitions. [2021-11-23 02:32:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:19,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 128 [2021-11-23 02:32:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:19,809 INFO L225 Difference]: With dead ends: 9097 [2021-11-23 02:32:19,810 INFO L226 Difference]: Without dead ends: 5546 [2021-11-23 02:32:19,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:19,826 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 500 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:19,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 1761 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:32:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-11-23 02:32:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5533. [2021-11-23 02:32:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 4219 states have (on average 1.3768665560559374) internal successors, (5809), 4287 states have internal predecessors, (5809), 941 states have call successors, (941), 373 states have call predecessors, (941), 372 states have return successors, (1024), 926 states have call predecessors, (1024), 940 states have call successors, (1024) [2021-11-23 02:32:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 7774 transitions. [2021-11-23 02:32:20,180 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 7774 transitions. Word has length 128 [2021-11-23 02:32:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:20,181 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 7774 transitions. [2021-11-23 02:32:20,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:32:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 7774 transitions. [2021-11-23 02:32:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 02:32:20,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:20,198 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:20,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:20,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:20,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash -944835305, now seen corresponding path program 1 times [2021-11-23 02:32:20,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:20,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952654712] [2021-11-23 02:32:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:20,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:20,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:20,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:20,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:32:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:32:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:21,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:32:21,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952654712] [2021-11-23 02:32:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952654712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:21,595 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:21,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:32:21,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682230958] [2021-11-23 02:32:21,595 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:21,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:21,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:21,597 INFO L87 Difference]: Start difference. First operand 5533 states and 7774 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:32:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:21,934 INFO L93 Difference]: Finished difference Result 13420 states and 18724 transitions. [2021-11-23 02:32:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 149 [2021-11-23 02:32:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:22,096 INFO L225 Difference]: With dead ends: 13420 [2021-11-23 02:32:22,096 INFO L226 Difference]: Without dead ends: 7911 [2021-11-23 02:32:22,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:22,114 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 546 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:22,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 2117 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:32:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7911 states. [2021-11-23 02:32:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7911 to 7887. [2021-11-23 02:32:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7887 states, 6012 states have (on average 1.3669328010645376) internal successors, (8218), 6134 states have internal predecessors, (8218), 1302 states have call successors, (1302), 573 states have call predecessors, (1302), 572 states have return successors, (1421), 1275 states have call predecessors, (1421), 1301 states have call successors, (1421) [2021-11-23 02:32:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7887 states to 7887 states and 10941 transitions. [2021-11-23 02:32:22,627 INFO L78 Accepts]: Start accepts. Automaton has 7887 states and 10941 transitions. Word has length 149 [2021-11-23 02:32:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:22,628 INFO L470 AbstractCegarLoop]: Abstraction has 7887 states and 10941 transitions. [2021-11-23 02:32:22,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:32:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7887 states and 10941 transitions. [2021-11-23 02:32:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 02:32:22,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:22,655 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:22,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:22,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:22,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1643009203, now seen corresponding path program 1 times [2021-11-23 02:32:22,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:22,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457637977] [2021-11-23 02:32:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:22,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:22,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:22,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:32:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:23,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:32:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-23 02:32:23,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 02:32:24,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457637977] [2021-11-23 02:32:24,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457637977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:24,127 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:24,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:32:24,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646885230] [2021-11-23 02:32:24,127 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:24,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:32:24,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:32:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:24,129 INFO L87 Difference]: Start difference. First operand 7887 states and 10941 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 02:32:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:24,461 INFO L93 Difference]: Finished difference Result 13198 states and 18316 transitions. [2021-11-23 02:32:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:32:24,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 151 [2021-11-23 02:32:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:24,500 INFO L225 Difference]: With dead ends: 13198 [2021-11-23 02:32:24,500 INFO L226 Difference]: Without dead ends: 5326 [2021-11-23 02:32:24,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:32:24,526 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 24 mSDsluCounter, 2648 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:24,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 3534 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:32:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-11-23 02:32:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5280. [2021-11-23 02:32:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5280 states, 4023 states have (on average 1.3671389510315686) internal successors, (5500), 4105 states have internal predecessors, (5500), 874 states have call successors, (874), 383 states have call predecessors, (874), 382 states have return successors, (953), 855 states have call predecessors, (953), 873 states have call successors, (953) [2021-11-23 02:32:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5280 states to 5280 states and 7327 transitions. [2021-11-23 02:32:24,887 INFO L78 Accepts]: Start accepts. Automaton has 5280 states and 7327 transitions. Word has length 151 [2021-11-23 02:32:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:24,888 INFO L470 AbstractCegarLoop]: Abstraction has 5280 states and 7327 transitions. [2021-11-23 02:32:24,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 02:32:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5280 states and 7327 transitions. [2021-11-23 02:32:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 02:32:24,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:24,907 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:24,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:25,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:25,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1883248949, now seen corresponding path program 1 times [2021-11-23 02:32:25,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:25,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534626847] [2021-11-23 02:32:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:25,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:25,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:25,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:32:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:25,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:32:25,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-23 02:32:25,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 02:32:26,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:26,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534626847] [2021-11-23 02:32:26,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534626847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:26,266 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:26,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:32:26,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398925681] [2021-11-23 02:32:26,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:26,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:32:26,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:32:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:32:26,268 INFO L87 Difference]: Start difference. First operand 5280 states and 7327 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-23 02:32:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:27,395 INFO L93 Difference]: Finished difference Result 14660 states and 20455 transitions. [2021-11-23 02:32:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:32:27,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 151 [2021-11-23 02:32:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:27,479 INFO L225 Difference]: With dead ends: 14660 [2021-11-23 02:32:27,479 INFO L226 Difference]: Without dead ends: 9430 [2021-11-23 02:32:27,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:32:27,501 INFO L933 BasicCegarLoop]: 1038 mSDtfsCounter, 1204 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:27,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 2906 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:32:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9430 states. [2021-11-23 02:32:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9430 to 9396. [2021-11-23 02:32:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9396 states, 7307 states have (on average 1.375393458327631) internal successors, (10050), 7417 states have internal predecessors, (10050), 1406 states have call successors, (1406), 683 states have call predecessors, (1406), 682 states have return successors, (1535), 1383 states have call predecessors, (1535), 1405 states have call successors, (1535) [2021-11-23 02:32:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 12991 transitions. [2021-11-23 02:32:27,993 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 12991 transitions. Word has length 151 [2021-11-23 02:32:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:27,993 INFO L470 AbstractCegarLoop]: Abstraction has 9396 states and 12991 transitions. [2021-11-23 02:32:27,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-23 02:32:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 12991 transitions. [2021-11-23 02:32:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:32:28,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:28,014 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:28,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:28,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:28,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1042738156, now seen corresponding path program 1 times [2021-11-23 02:32:28,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404385595] [2021-11-23 02:32:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:28,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:28,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:28,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:32:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:28,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:32:28,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 02:32:29,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 02:32:29,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:29,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404385595] [2021-11-23 02:32:29,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404385595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:29,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:29,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:32:29,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047434557] [2021-11-23 02:32:29,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:29,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:29,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:29,406 INFO L87 Difference]: Start difference. First operand 9396 states and 12991 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:32:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:29,667 INFO L93 Difference]: Finished difference Result 14155 states and 19730 transitions. [2021-11-23 02:32:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 156 [2021-11-23 02:32:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:29,712 INFO L225 Difference]: With dead ends: 14155 [2021-11-23 02:32:29,713 INFO L226 Difference]: Without dead ends: 9444 [2021-11-23 02:32:29,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:29,733 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 5 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:29,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1760 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:32:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2021-11-23 02:32:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 9444. [2021-11-23 02:32:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9444 states, 7343 states have (on average 1.373553043715103) internal successors, (10086), 7465 states have internal predecessors, (10086), 1406 states have call successors, (1406), 683 states have call predecessors, (1406), 694 states have return successors, (1547), 1383 states have call predecessors, (1547), 1405 states have call successors, (1547) [2021-11-23 02:32:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9444 states to 9444 states and 13039 transitions. [2021-11-23 02:32:30,233 INFO L78 Accepts]: Start accepts. Automaton has 9444 states and 13039 transitions. Word has length 156 [2021-11-23 02:32:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:30,234 INFO L470 AbstractCegarLoop]: Abstraction has 9444 states and 13039 transitions. [2021-11-23 02:32:30,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:32:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9444 states and 13039 transitions. [2021-11-23 02:32:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 02:32:30,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:30,256 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:30,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:30,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:30,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1404375923, now seen corresponding path program 1 times [2021-11-23 02:32:30,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:30,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392418068] [2021-11-23 02:32:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:30,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:30,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:30,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:32:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:30,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:32:30,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-23 02:32:31,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 02:32:32,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:32,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392418068] [2021-11-23 02:32:32,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392418068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:32,574 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:32,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-23 02:32:32,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666870164] [2021-11-23 02:32:32,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:32,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:32:32,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:32:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:32:32,577 INFO L87 Difference]: Start difference. First operand 9444 states and 13039 transitions. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 7 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2021-11-23 02:32:37,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:39,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:41,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:43,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:45,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:47,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:49,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:51,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:56,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:58,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:00,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:02,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:07,890 INFO L93 Difference]: Finished difference Result 25097 states and 35072 transitions. [2021-11-23 02:33:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:33:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 7 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) Word has length 158 [2021-11-23 02:33:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:07,970 INFO L225 Difference]: With dead ends: 25097 [2021-11-23 02:33:07,970 INFO L226 Difference]: Without dead ends: 15703 [2021-11-23 02:33:08,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:33:08,005 INFO L933 BasicCegarLoop]: 1051 mSDtfsCounter, 3132 mSDsluCounter, 3786 mSDsCounter, 0 mSdLazyCounter, 3183 mSolverCounterSat, 1024 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3300 SdHoareTripleChecker+Valid, 4837 SdHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 3183 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:08,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3300 Valid, 4837 Invalid, 4219 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1024 Valid, 3183 Invalid, 12 Unknown, 0 Unchecked, 34.5s Time] [2021-11-23 02:33:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15703 states. [2021-11-23 02:33:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15703 to 15284. [2021-11-23 02:33:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15284 states, 11786 states have (on average 1.3655184116748684) internal successors, (16094), 12005 states have internal predecessors, (16094), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1150 states have return successors, (2688), 2303 states have call predecessors, (2688), 2346 states have call successors, (2688) [2021-11-23 02:33:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15284 states to 15284 states and 21129 transitions. [2021-11-23 02:33:08,776 INFO L78 Accepts]: Start accepts. Automaton has 15284 states and 21129 transitions. Word has length 158 [2021-11-23 02:33:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:08,777 INFO L470 AbstractCegarLoop]: Abstraction has 15284 states and 21129 transitions. [2021-11-23 02:33:08,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 7 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2021-11-23 02:33:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15284 states and 21129 transitions. [2021-11-23 02:33:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-23 02:33:08,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:08,807 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:08,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:09,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:33:09,023 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 484822487, now seen corresponding path program 1 times [2021-11-23 02:33:09,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:33:09,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944956391] [2021-11-23 02:33:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:09,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:33:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:33:09,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:33:09,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:33:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:33:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:10,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 02:33:10,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 41 [2021-11-23 02:33:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-23 02:33:10,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 02:33:11,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:33:11,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944956391] [2021-11-23 02:33:11,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944956391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:11,102 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-23 02:33:11,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842243986] [2021-11-23 02:33:11,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:11,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:33:11,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:33:11,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:33:11,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:33:11,106 INFO L87 Difference]: Start difference. First operand 15284 states and 21129 transitions. Second operand has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 15 states have internal predecessors, (140), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:33:16,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:18,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:20,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:22,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:24,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:26,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:28,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:32,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:34,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:35,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:37,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:39,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:41,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:45,623 INFO L93 Difference]: Finished difference Result 30974 states and 42889 transitions. [2021-11-23 02:33:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:33:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 15 states have internal predecessors, (140), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 193 [2021-11-23 02:33:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:45,700 INFO L225 Difference]: With dead ends: 30974 [2021-11-23 02:33:45,700 INFO L226 Difference]: Without dead ends: 15740 [2021-11-23 02:33:45,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:33:45,734 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 181 mSDsluCounter, 6531 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 48 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 7405 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:45,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 7405 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 500 Invalid, 8 Unknown, 0 Unchecked, 33.5s Time] [2021-11-23 02:33:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15740 states. [2021-11-23 02:33:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15740 to 15404. [2021-11-23 02:33:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15404 states, 11906 states have (on average 1.3638501595834034) internal successors, (16238), 12125 states have internal predecessors, (16238), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1150 states have return successors, (2688), 2303 states have call predecessors, (2688), 2346 states have call successors, (2688) [2021-11-23 02:33:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15404 states to 15404 states and 21273 transitions. [2021-11-23 02:33:46,484 INFO L78 Accepts]: Start accepts. Automaton has 15404 states and 21273 transitions. Word has length 193 [2021-11-23 02:33:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:46,485 INFO L470 AbstractCegarLoop]: Abstraction has 15404 states and 21273 transitions. [2021-11-23 02:33:46,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 15 states have internal predecessors, (140), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:33:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 15404 states and 21273 transitions. [2021-11-23 02:33:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-23 02:33:46,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:46,514 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:46,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:33:46,731 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash -7803687, now seen corresponding path program 1 times [2021-11-23 02:33:46,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:33:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679070724] [2021-11-23 02:33:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:46,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:33:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:33:46,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:33:46,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:33:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:33:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-23 02:33:47,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-23 02:33:48,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:33:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679070724] [2021-11-23 02:33:48,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679070724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:48,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:48,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:33:48,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669234092] [2021-11-23 02:33:48,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:48,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:33:48,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:33:48,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:33:48,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:48,351 INFO L87 Difference]: Start difference. First operand 15404 states and 21273 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:33:48,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:48,882 INFO L93 Difference]: Finished difference Result 30940 states and 42873 transitions. [2021-11-23 02:33:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:33:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 193 [2021-11-23 02:33:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:48,951 INFO L225 Difference]: With dead ends: 30940 [2021-11-23 02:33:48,951 INFO L226 Difference]: Without dead ends: 15586 [2021-11-23 02:33:48,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:48,987 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 2 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:48,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3527 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:33:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15586 states. [2021-11-23 02:33:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15586 to 15524. [2021-11-23 02:33:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15524 states, 11996 states have (on average 1.3611203734578192) internal successors, (16328), 12215 states have internal predecessors, (16328), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1180 states have return successors, (2733), 2333 states have call predecessors, (2733), 2346 states have call successors, (2733) [2021-11-23 02:33:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15524 states to 15524 states and 21408 transitions. [2021-11-23 02:33:49,690 INFO L78 Accepts]: Start accepts. Automaton has 15524 states and 21408 transitions. Word has length 193 [2021-11-23 02:33:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 15524 states and 21408 transitions. [2021-11-23 02:33:49,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:33:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 15524 states and 21408 transitions. [2021-11-23 02:33:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-23 02:33:49,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:49,716 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:49,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:49,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:33:49,931 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1515483270, now seen corresponding path program 1 times [2021-11-23 02:33:49,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:33:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647096533] [2021-11-23 02:33:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:49,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:33:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:33:49,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:33:49,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:33:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:33:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-11-23 02:33:50,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-23 02:33:51,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:33:51,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647096533] [2021-11-23 02:33:51,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647096533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:51,356 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:51,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:33:51,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15659567] [2021-11-23 02:33:51,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:51,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:33:51,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:33:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:33:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:33:51,359 INFO L87 Difference]: Start difference. First operand 15524 states and 21408 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:33:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:53,220 INFO L93 Difference]: Finished difference Result 40608 states and 55661 transitions. [2021-11-23 02:33:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:33:53,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 215 [2021-11-23 02:33:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:53,323 INFO L225 Difference]: With dead ends: 40608 [2021-11-23 02:33:53,324 INFO L226 Difference]: Without dead ends: 25134 [2021-11-23 02:33:53,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:33:53,360 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1638 mSDsluCounter, 5500 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 7091 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:53,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1638 Valid, 7091 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:33:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25134 states. [2021-11-23 02:33:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25134 to 15548. [2021-11-23 02:33:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15548 states, 12020 states have (on average 1.3603993344425958) internal successors, (16352), 12239 states have internal predecessors, (16352), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1180 states have return successors, (2733), 2333 states have call predecessors, (2733), 2346 states have call successors, (2733) [2021-11-23 02:33:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15548 states to 15548 states and 21432 transitions. [2021-11-23 02:33:54,366 INFO L78 Accepts]: Start accepts. Automaton has 15548 states and 21432 transitions. Word has length 215 [2021-11-23 02:33:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:54,367 INFO L470 AbstractCegarLoop]: Abstraction has 15548 states and 21432 transitions. [2021-11-23 02:33:54,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:33:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 15548 states and 21432 transitions. [2021-11-23 02:33:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-23 02:33:54,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:54,392 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:54,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:54,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:33:54,607 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash -592633712, now seen corresponding path program 1 times [2021-11-23 02:33:54,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:33:54,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790982569] [2021-11-23 02:33:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:54,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:33:54,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:33:54,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:33:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:33:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:33:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-23 02:33:56,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-23 02:33:58,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:33:58,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790982569] [2021-11-23 02:33:58,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790982569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:58,282 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:58,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 22 [2021-11-23 02:33:58,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116776556] [2021-11-23 02:33:58,282 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:33:58,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:33:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:33:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:33:58,288 INFO L87 Difference]: Start difference. First operand 15548 states and 21432 transitions. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 16 states have internal predecessors, (139), 4 states have call successors, (28), 2 states have call predecessors, (28), 8 states have return successors, (30), 10 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-23 02:34:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:00,794 INFO L93 Difference]: Finished difference Result 43682 states and 63192 transitions. [2021-11-23 02:34:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:34:00,795 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 16 states have internal predecessors, (139), 4 states have call successors, (28), 2 states have call predecessors, (28), 8 states have return successors, (30), 10 states have call predecessors, (30), 4 states have call successors, (30) Word has length 200 [2021-11-23 02:34:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:00,911 INFO L225 Difference]: With dead ends: 43682 [2021-11-23 02:34:00,911 INFO L226 Difference]: Without dead ends: 28184 [2021-11-23 02:34:00,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:34:00,948 INFO L933 BasicCegarLoop]: 1446 mSDtfsCounter, 721 mSDsluCounter, 18133 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 19579 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:00,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 19579 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:34:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28184 states. [2021-11-23 02:34:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28184 to 15716. [2021-11-23 02:34:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15716 states, 12140 states have (on average 1.3543657331136738) internal successors, (16442), 12359 states have internal predecessors, (16442), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1228 states have return successors, (2793), 2381 states have call predecessors, (2793), 2346 states have call successors, (2793) [2021-11-23 02:34:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15716 states to 15716 states and 21582 transitions. [2021-11-23 02:34:01,921 INFO L78 Accepts]: Start accepts. Automaton has 15716 states and 21582 transitions. Word has length 200 [2021-11-23 02:34:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:01,923 INFO L470 AbstractCegarLoop]: Abstraction has 15716 states and 21582 transitions. [2021-11-23 02:34:01,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 16 states have internal predecessors, (139), 4 states have call successors, (28), 2 states have call predecessors, (28), 8 states have return successors, (30), 10 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-23 02:34:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15716 states and 21582 transitions. [2021-11-23 02:34:01,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-23 02:34:01,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:01,944 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:01,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:02,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:34:02,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1833099563, now seen corresponding path program 1 times [2021-11-23 02:34:02,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:34:02,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387166307] [2021-11-23 02:34:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:02,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:34:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:34:02,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:34:02,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:34:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:02,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:34:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-11-23 02:34:03,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-23 02:34:03,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:34:03,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387166307] [2021-11-23 02:34:03,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387166307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:03,811 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:03,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 02:34:03,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182635645] [2021-11-23 02:34:03,811 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:03,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:34:03,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:34:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:34:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:34:03,814 INFO L87 Difference]: Start difference. First operand 15716 states and 21582 transitions. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:34:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:07,190 INFO L93 Difference]: Finished difference Result 44326 states and 61093 transitions. [2021-11-23 02:34:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:34:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 226 [2021-11-23 02:34:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:07,295 INFO L225 Difference]: With dead ends: 44326 [2021-11-23 02:34:07,296 INFO L226 Difference]: Without dead ends: 28660 [2021-11-23 02:34:07,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:34:07,331 INFO L933 BasicCegarLoop]: 2195 mSDtfsCounter, 3073 mSDsluCounter, 6291 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3080 SdHoareTripleChecker+Valid, 8486 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:07,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3080 Valid, 8486 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:34:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28660 states. [2021-11-23 02:34:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28660 to 15716. [2021-11-23 02:34:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15716 states, 12140 states have (on average 1.3543657331136738) internal successors, (16442), 12359 states have internal predecessors, (16442), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1228 states have return successors, (2793), 2381 states have call predecessors, (2793), 2346 states have call successors, (2793) [2021-11-23 02:34:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15716 states to 15716 states and 21582 transitions. [2021-11-23 02:34:08,420 INFO L78 Accepts]: Start accepts. Automaton has 15716 states and 21582 transitions. Word has length 226 [2021-11-23 02:34:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:08,420 INFO L470 AbstractCegarLoop]: Abstraction has 15716 states and 21582 transitions. [2021-11-23 02:34:08,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:34:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15716 states and 21582 transitions. [2021-11-23 02:34:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-23 02:34:08,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:08,436 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:08,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:08,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:34:08,658 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1966699871, now seen corresponding path program 1 times [2021-11-23 02:34:08,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:34:08,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430845101] [2021-11-23 02:34:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:08,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:34:08,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:34:08,660 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:34:08,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:34:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:09,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:34:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-23 02:34:10,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-23 02:34:11,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:34:11,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430845101] [2021-11-23 02:34:11,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430845101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:11,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [124209742] [2021-11-23 02:34:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:11,537 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:34:11,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:34:11,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:34:11,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 02:34:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:34:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-23 02:34:12,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 02:34:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [124209742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:13,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:34:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 9] total 20 [2021-11-23 02:34:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011119560] [2021-11-23 02:34:13,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:13,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:34:13,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:34:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:34:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:34:13,387 INFO L87 Difference]: Start difference. First operand 15716 states and 21582 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:34:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:17,871 INFO L93 Difference]: Finished difference Result 60348 states and 89711 transitions. [2021-11-23 02:34:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:34:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 233 [2021-11-23 02:34:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:18,027 INFO L225 Difference]: With dead ends: 60348 [2021-11-23 02:34:18,027 INFO L226 Difference]: Without dead ends: 44682 [2021-11-23 02:34:18,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 913 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-23 02:34:18,071 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 2556 mSDsluCounter, 7931 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 9629 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:18,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 9629 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:34:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44682 states. [2021-11-23 02:34:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44682 to 15812. [2021-11-23 02:34:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15812 states, 12236 states have (on average 1.3515854854527622) internal successors, (16538), 12455 states have internal predecessors, (16538), 2347 states have call successors, (2347), 1115 states have call predecessors, (2347), 1228 states have return successors, (2793), 2381 states have call predecessors, (2793), 2346 states have call successors, (2793) [2021-11-23 02:34:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15812 states to 15812 states and 21678 transitions. [2021-11-23 02:34:19,461 INFO L78 Accepts]: Start accepts. Automaton has 15812 states and 21678 transitions. Word has length 233 [2021-11-23 02:34:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:19,462 INFO L470 AbstractCegarLoop]: Abstraction has 15812 states and 21678 transitions. [2021-11-23 02:34:19,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:34:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15812 states and 21678 transitions. [2021-11-23 02:34:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-23 02:34:19,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:19,481 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:19,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:19,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 02:34:19,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:34:19,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1691940257, now seen corresponding path program 1 times [2021-11-23 02:34:19,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:34:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688425927] [2021-11-23 02:34:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:19,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:34:19,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:34:19,889 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:34:19,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:34:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:20,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:34:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-23 02:34:21,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-23 02:34:22,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:34:22,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688425927] [2021-11-23 02:34:22,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688425927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:22,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591028321] [2021-11-23 02:34:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:22,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:34:22,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:34:22,942 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:34:22,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 02:34:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:34:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-23 02:34:24,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-23 02:34:26,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591028321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:26,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295604718] [2021-11-23 02:34:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:26,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:26,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:26,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ef39c0-e15d-4036-8f6d-0ef4ef9eac84/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:34:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:34:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-23 02:34:27,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-23 02:34:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295604718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:28,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:34:28,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 9] total 15 [2021-11-23 02:34:28,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107669085] [2021-11-23 02:34:28,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:34:28,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:34:28,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:34:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:34:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:34:28,916 INFO L87 Difference]: Start difference. First operand 15812 states and 21678 transitions. Second operand has 15 states, 15 states have (on average 15.466666666666667) internal successors, (232), 15 states have internal predecessors, (232), 9 states have call successors, (46), 7 states have call predecessors, (46), 10 states have return successors, (45), 12 states have call predecessors, (45), 9 states have call successors, (45) [2021-11-23 02:34:32,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:34,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:36,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:40,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:42,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:44,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:46,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:48,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:57,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:59,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:07,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:09,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []