./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.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_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/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_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/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_bc6e08dc-3260-4b41-a92a-1b5e04965605/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 2528ab0154bfd45dbc6e33de3a31029199c439afce343ebf61a330fa9c381cd3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:23,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:23,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:23,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:23,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:23,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:23,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:23,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:23,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:23,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:23,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:23,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:23,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:23,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:23,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:23,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:23,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:23,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:23,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:23,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:23,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:23,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:23,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:23,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:23,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:23,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:23,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:23,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:23,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:23,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:23,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:23,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:23,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:23,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:23,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:23,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:23,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:23,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:23,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:23,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:23,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:23,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:27:23,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:23,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:23,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:23,314 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:23,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:23,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:23,316 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:23,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:23,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:23,316 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:23,318 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:23,318 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:23,318 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:23,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:23,319 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:23,319 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:23,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:23,319 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:23,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:23,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:23,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:23,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:23,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:23,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:23,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:23,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:23,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:23,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:23,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:23,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:23,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:23,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:23,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:23,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:23,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:23,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:23,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:23,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:23,327 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_bc6e08dc-3260-4b41-a92a-1b5e04965605/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2528ab0154bfd45dbc6e33de3a31029199c439afce343ebf61a330fa9c381cd3 [2021-11-23 02:27:23,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:23,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:23,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:23,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:23,745 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:23,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.ko-entry_point.cil.out.i [2021-11-23 02:27:23,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/data/c5196a222/a2decf6d08ae4c8da1711e1b3c49c65c/FLAGcdf93365a [2021-11-23 02:27:24,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:24,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.ko-entry_point.cil.out.i [2021-11-23 02:27:24,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/data/c5196a222/a2decf6d08ae4c8da1711e1b3c49c65c/FLAGcdf93365a [2021-11-23 02:27:25,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/data/c5196a222/a2decf6d08ae4c8da1711e1b3c49c65c [2021-11-23 02:27:25,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:25,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:25,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:25,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:25,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:25,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:25" (1/1) ... [2021-11-23 02:27:25,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fd6607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:25, skipping insertion in model container [2021-11-23 02:27:25,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:25" (1/1) ... [2021-11-23 02:27:25,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:25,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:28,021 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_bc6e08dc-3260-4b41-a92a-1b5e04965605/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.ko-entry_point.cil.out.i[313663,313676] [2021-11-23 02:27:28,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:28,183 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:28,697 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_bc6e08dc-3260-4b41-a92a-1b5e04965605/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.ko-entry_point.cil.out.i[313663,313676] [2021-11-23 02:27:28,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:28,968 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:28,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28 WrapperNode [2021-11-23 02:27:28,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:28,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:28,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:28,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:28,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,258 INFO L137 Inliner]: procedures = 323, calls = 2177, calls flagged for inlining = 155, calls inlined = 135, statements flattened = 4519 [2021-11-23 02:27:29,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:29,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:29,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:29,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:29,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:29,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:29,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:29,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:29,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (1/1) ... [2021-11-23 02:27:29,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:29,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:29,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure drain_rx [2021-11-23 02:27:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure drain_rx [2021-11-23 02:27:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-23 02:27:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-23 02:27:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-23 02:27:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_shutdown_3 [2021-11-23 02:27:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_shutdown_3 [2021-11-23 02:27:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:27:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure miiport_write [2021-11-23 02:27:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure miiport_write [2021-11-23 02:27:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:27:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:27:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:27:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:27:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:27:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure switch_port_external [2021-11-23 02:27:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_port_external [2021-11-23 02:27:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:27:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:27:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-23 02:27:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-23 02:27:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_tx_done [2021-11-23 02:27:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_tx_done [2021-11-23 02:27:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:27:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:27:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:27:29,717 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:27:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 02:27:29,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 02:27:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure get_stats [2021-11-23 02:27:29,717 INFO L138 BoogieDeclarations]: Found implementation of procedure get_stats [2021-11-23 02:27:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:27:29,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:27:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure reinit_rx [2021-11-23 02:27:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reinit_rx [2021-11-23 02:27:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-23 02:27:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-23 02:27:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure disable_irq [2021-11-23 02:27:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_irq [2021-11-23 02:27:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:27:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:27:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:27:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:27:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure reinit_ring [2021-11-23 02:27:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reinit_ring [2021-11-23 02:27:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:27:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:27:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-23 02:27:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-23 02:27:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-23 02:27:29,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-23 02:27:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:27:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:27:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 02:27:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 02:27:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:27:29,725 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:27:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_change_mtu [2021-11-23 02:27:29,725 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_change_mtu [2021-11-23 02:27:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:27:29,726 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:27:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:27:29,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:27:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure init_registers [2021-11-23 02:27:29,727 INFO L138 BoogieDeclarations]: Found implementation of procedure init_registers [2021-11-23 02:27:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:27:29,727 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:27:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:27:29,727 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:27:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:27:29,727 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:27:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies [2021-11-23 02:27:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies [2021-11-23 02:27:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:27:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure switch_port_internal [2021-11-23 02:27:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_port_internal [2021-11-23 02:27:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:27:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:27:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-23 02:27:29,730 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-23 02:27:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure dump_ring [2021-11-23 02:27:29,730 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_ring [2021-11-23 02:27:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:27:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:27:29,731 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:27:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:27:29,732 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:27:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:27:29,732 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:27:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 02:27:29,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 02:27:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:27:29,734 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:27:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure __set_rx_mode [2021-11-23 02:27:29,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_rx_mode [2021-11-23 02:27:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:27:29,735 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:27:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-23 02:27:29,735 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-23 02:27:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:27:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:27:29,736 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:27:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-23 02:27:29,736 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-23 02:27:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:27:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure intr_handler [2021-11-23 02:27:29,737 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_handler [2021-11-23 02:27:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_read [2021-11-23 02:27:29,737 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_read [2021-11-23 02:27:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:27:29,738 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:27:29,739 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:27:29,742 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:27:29,742 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:27:29,743 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:27:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_stop_rxtx [2021-11-23 02:27:29,743 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_stop_rxtx [2021-11-23 02:27:29,746 INFO L130 BoogieDeclarations]: Found specification of procedure __get_stats [2021-11-23 02:27:29,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __get_stats [2021-11-23 02:27:29,746 INFO L130 BoogieDeclarations]: Found specification of procedure ns_tx_timeout [2021-11-23 02:27:29,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_tx_timeout [2021-11-23 02:27:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure set_bufsize [2021-11-23 02:27:29,753 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bufsize [2021-11-23 02:27:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:27:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:27:29,753 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:27:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:27:29,753 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:27:29,754 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_reset [2021-11-23 02:27:29,754 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_reset [2021-11-23 02:27:29,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:27:29,754 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_2 [2021-11-23 02:27:29,754 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_2 [2021-11-23 02:27:29,754 INFO L130 BoogieDeclarations]: Found specification of procedure drain_ring [2021-11-23 02:27:29,754 INFO L138 BoogieDeclarations]: Found implementation of procedure drain_ring [2021-11-23 02:27:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:27:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-23 02:27:29,755 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-23 02:27:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:27:29,755 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:27:29,755 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:27:29,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:27:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-23 02:27:29,756 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-23 02:27:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure move_int_phy [2021-11-23 02:27:29,756 INFO L138 BoogieDeclarations]: Found implementation of procedure move_int_phy [2021-11-23 02:27:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_ioctl [2021-11-23 02:27:29,756 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_ioctl [2021-11-23 02:27:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:27:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:27:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:27:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:27:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure enable_wol_mode [2021-11-23 02:27:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_wol_mode [2021-11-23 02:27:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_resume [2021-11-23 02:27:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_resume [2021-11-23 02:27:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_remove1 [2021-11-23 02:27:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_remove1 [2021-11-23 02:27:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:27:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure __bitrev16 [2021-11-23 02:27:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __bitrev16 [2021-11-23 02:27:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-11-23 02:27:29,759 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-11-23 02:27:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure init_ring [2021-11-23 02:27:29,759 INFO L138 BoogieDeclarations]: Found implementation of procedure init_ring [2021-11-23 02:27:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:27:29,759 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:27:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-23 02:27:29,760 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-23 02:27:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:27:29,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:27:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:27:29,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:27:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_irq_disable [2021-11-23 02:27:29,761 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_irq_disable [2021-11-23 02:27:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure enable_irq [2021-11-23 02:27:29,761 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_irq [2021-11-23 02:27:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:27:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_2 [2021-11-23 02:27:29,761 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_2 [2021-11-23 02:27:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:27:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:27:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure __bitrev8 [2021-11-23 02:27:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __bitrev8 [2021-11-23 02:27:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure mii_getbit [2021-11-23 02:27:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_getbit [2021-11-23 02:27:29,763 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-23 02:27:29,763 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-23 02:27:29,763 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:27:29,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:27:29,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:27:29,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 02:27:29,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 02:27:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-23 02:27:29,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-23 02:27:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:27:29,764 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:27:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-23 02:27:29,764 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-23 02:27:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure ns_ioaddr [2021-11-23 02:27:29,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_ioaddr [2021-11-23 02:27:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_3 [2021-11-23 02:27:29,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_3 [2021-11-23 02:27:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:27:29,765 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:27:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure mii_send_bits [2021-11-23 02:27:29,766 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_send_bits [2021-11-23 02:27:29,766 INFO L130 BoogieDeclarations]: Found specification of procedure refill_rx [2021-11-23 02:27:29,766 INFO L138 BoogieDeclarations]: Found implementation of procedure refill_rx [2021-11-23 02:27:29,766 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_poll_controller [2021-11-23 02:27:29,766 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_poll_controller [2021-11-23 02:27:29,766 INFO L130 BoogieDeclarations]: Found specification of procedure check_link [2021-11-23 02:27:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure check_link [2021-11-23 02:27:29,767 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-23 02:27:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-23 02:27:29,767 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed [2021-11-23 02:27:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed [2021-11-23 02:27:29,767 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-23 02:27:29,767 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-23 02:27:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure drain_tx [2021-11-23 02:27:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure drain_tx [2021-11-23 02:27:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_irq_enable [2021-11-23 02:27:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_irq_enable [2021-11-23 02:27:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:27:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:27:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:27:29,769 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:27:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:27:29,769 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:27:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure init_phy_fixup [2021-11-23 02:27:29,769 INFO L138 BoogieDeclarations]: Found implementation of procedure init_phy_fixup [2021-11-23 02:27:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure miiport_read [2021-11-23 02:27:29,770 INFO L138 BoogieDeclarations]: Found implementation of procedure miiport_read [2021-11-23 02:27:29,770 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-23 02:27:29,770 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-23 02:27:29,770 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-23 02:27:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-23 02:27:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-23 02:27:29,775 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-23 02:27:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure mii_nway_result [2021-11-23 02:27:29,776 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_nway_result [2021-11-23 02:27:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:29,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:30,734 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:30,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:31,056 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:27:34,214 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:35,980 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:35,980 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:27:35,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:35 BoogieIcfgContainer [2021-11-23 02:27:35,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:35,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:35,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:35,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:35,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:25" (1/3) ... [2021-11-23 02:27:35,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7298d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:35, skipping insertion in model container [2021-11-23 02:27:35,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:28" (2/3) ... [2021-11-23 02:27:35,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7298d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:35, skipping insertion in model container [2021-11-23 02:27:35,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:35" (3/3) ... [2021-11-23 02:27:35,997 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--natsemi--natsemi.ko-entry_point.cil.out.i [2021-11-23 02:27:36,006 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:36,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:27:36,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:36,095 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 02:27:36,096 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:27:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 1745 states, 979 states have (on average 1.2921348314606742) internal successors, (1265), 1013 states have internal predecessors, (1265), 651 states have call successors, (651), 114 states have call predecessors, (651), 113 states have return successors, (643), 638 states have call predecessors, (643), 643 states have call successors, (643) [2021-11-23 02:27:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-23 02:27:36,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:36,205 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:36,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -697121758, now seen corresponding path program 1 times [2021-11-23 02:27:36,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39774149] [2021-11-23 02:27:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:36,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2021-11-23 02:27:37,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:37,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39774149] [2021-11-23 02:27:37,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39774149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:37,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:37,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605623209] [2021-11-23 02:27:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:37,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:37,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:37,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:37,155 INFO L87 Difference]: Start difference. First operand has 1745 states, 979 states have (on average 1.2921348314606742) internal successors, (1265), 1013 states have internal predecessors, (1265), 651 states have call successors, (651), 114 states have call predecessors, (651), 113 states have return successors, (643), 638 states have call predecessors, (643), 643 states have call successors, (643) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:27:40,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:42,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:43,278 INFO L93 Difference]: Finished difference Result 4913 states and 7224 transitions. [2021-11-23 02:27:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 199 [2021-11-23 02:27:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:43,370 INFO L225 Difference]: With dead ends: 4913 [2021-11-23 02:27:43,371 INFO L226 Difference]: Without dead ends: 3176 [2021-11-23 02:27:43,391 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 02:27:43,398 INFO L933 BasicCegarLoop]: 2971 mSDtfsCounter, 2164 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 5222 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:43,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2164 Valid, 5222 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 02:27:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-11-23 02:27:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 3173. [2021-11-23 02:27:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 1778 states have (on average 1.2772778402699663) internal successors, (2271), 1825 states have internal predecessors, (2271), 1174 states have call successors, (1174), 221 states have call predecessors, (1174), 220 states have return successors, (1173), 1164 states have call predecessors, (1173), 1173 states have call successors, (1173) [2021-11-23 02:27:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 4618 transitions. [2021-11-23 02:27:43,804 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 4618 transitions. Word has length 199 [2021-11-23 02:27:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:43,806 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 4618 transitions. [2021-11-23 02:27:43,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:27:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 4618 transitions. [2021-11-23 02:27:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 02:27:43,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:43,820 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-23 02:27:43,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:43,821 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1329035442, now seen corresponding path program 1 times [2021-11-23 02:27:43,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801462736] [2021-11-23 02:27:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:43,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-23 02:27:44,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801462736] [2021-11-23 02:27:44,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801462736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:44,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:44,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:27:44,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693817679] [2021-11-23 02:27:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:44,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:44,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:44,338 INFO L87 Difference]: Start difference. First operand 3173 states and 4618 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:27:46,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:49,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:53,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:55,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:59,825 INFO L93 Difference]: Finished difference Result 12340 states and 17932 transitions. [2021-11-23 02:27:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 255 [2021-11-23 02:27:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:59,919 INFO L225 Difference]: With dead ends: 12340 [2021-11-23 02:27:59,919 INFO L226 Difference]: Without dead ends: 9204 [2021-11-23 02:27:59,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:59,945 INFO L933 BasicCegarLoop]: 3493 mSDtfsCounter, 4790 mSDsluCounter, 7257 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4790 SdHoareTripleChecker+Valid, 9919 SdHoareTripleChecker+Invalid, 3516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:59,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4790 Valid, 9919 Invalid, 3516 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 3471 Invalid, 1 Unknown, 0 Unchecked, 14.8s Time] [2021-11-23 02:27:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2021-11-23 02:28:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 9151. [2021-11-23 02:28:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9151 states, 5161 states have (on average 1.2797907382290254) internal successors, (6605), 5294 states have internal predecessors, (6605), 3339 states have call successors, (3339), 651 states have call predecessors, (3339), 650 states have return successors, (3350), 3315 states have call predecessors, (3350), 3338 states have call successors, (3350) [2021-11-23 02:28:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9151 states to 9151 states and 13294 transitions. [2021-11-23 02:28:00,673 INFO L78 Accepts]: Start accepts. Automaton has 9151 states and 13294 transitions. Word has length 255 [2021-11-23 02:28:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:00,675 INFO L470 AbstractCegarLoop]: Abstraction has 9151 states and 13294 transitions. [2021-11-23 02:28:00,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:28:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9151 states and 13294 transitions. [2021-11-23 02:28:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-23 02:28:00,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:00,689 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 5, 5, 5, 5, 5, 5, 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] [2021-11-23 02:28:00,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:28:00,690 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -256540305, now seen corresponding path program 1 times [2021-11-23 02:28:00,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238601218] [2021-11-23 02:28:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:00,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2021-11-23 02:28:01,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238601218] [2021-11-23 02:28:01,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238601218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:01,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:01,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:01,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359036093] [2021-11-23 02:28:01,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:01,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:01,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:01,064 INFO L87 Difference]: Start difference. First operand 9151 states and 13294 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:28:03,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:04,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:06,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:07,498 INFO L93 Difference]: Finished difference Result 11446 states and 16344 transitions. [2021-11-23 02:28:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 282 [2021-11-23 02:28:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:07,603 INFO L225 Difference]: With dead ends: 11446 [2021-11-23 02:28:07,604 INFO L226 Difference]: Without dead ends: 11443 [2021-11-23 02:28:07,612 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 02:28:07,617 INFO L933 BasicCegarLoop]: 2643 mSDtfsCounter, 1778 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1778 SdHoareTripleChecker+Valid, 3788 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:07,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1778 Valid, 3788 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:28:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11443 states. [2021-11-23 02:28:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11443 to 11443. [2021-11-23 02:28:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11443 states, 6373 states have (on average 1.2576494586536953) internal successors, (8015), 6524 states have internal predecessors, (8015), 4155 states have call successors, (4155), 915 states have call predecessors, (4155), 914 states have return successors, (4166), 4131 states have call predecessors, (4166), 4154 states have call successors, (4166) [2021-11-23 02:28:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11443 states to 11443 states and 16336 transitions. [2021-11-23 02:28:08,333 INFO L78 Accepts]: Start accepts. Automaton has 11443 states and 16336 transitions. Word has length 282 [2021-11-23 02:28:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:08,337 INFO L470 AbstractCegarLoop]: Abstraction has 11443 states and 16336 transitions. [2021-11-23 02:28:08,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:28:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 11443 states and 16336 transitions. [2021-11-23 02:28:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-23 02:28:08,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:08,352 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 5, 5, 5, 5, 5, 5, 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] [2021-11-23 02:28:08,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:28:08,353 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -882342723, now seen corresponding path program 1 times [2021-11-23 02:28:08,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:08,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8226403] [2021-11-23 02:28:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:08,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-11-23 02:28:08,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8226403] [2021-11-23 02:28:08,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8226403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:08,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:08,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:08,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167363463] [2021-11-23 02:28:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:08,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:08,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:08,636 INFO L87 Difference]: Start difference. First operand 11443 states and 16336 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 02:28:11,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:14,035 INFO L93 Difference]: Finished difference Result 31167 states and 44400 transitions. [2021-11-23 02:28:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 288 [2021-11-23 02:28:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:14,178 INFO L225 Difference]: With dead ends: 31167 [2021-11-23 02:28:14,178 INFO L226 Difference]: Without dead ends: 19774 [2021-11-23 02:28:14,242 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 02:28:14,243 INFO L933 BasicCegarLoop]: 2918 mSDtfsCounter, 1968 mSDsluCounter, 2373 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 5081 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:14,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1968 Valid, 5081 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 542 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 02:28:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19774 states. [2021-11-23 02:28:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19774 to 19737. [2021-11-23 02:28:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 10971 states have (on average 1.2534864643150123) internal successors, (13752), 11257 states have internal predecessors, (13752), 7156 states have call successors, (7156), 1616 states have call predecessors, (7156), 1609 states have return successors, (7179), 7071 states have call predecessors, (7179), 7155 states have call successors, (7179) [2021-11-23 02:28:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 28087 transitions. [2021-11-23 02:28:15,435 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 28087 transitions. Word has length 288 [2021-11-23 02:28:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:15,436 INFO L470 AbstractCegarLoop]: Abstraction has 19737 states and 28087 transitions. [2021-11-23 02:28:15,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 02:28:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 28087 transitions. [2021-11-23 02:28:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-23 02:28:15,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:15,472 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 5, 5, 5, 5, 5, 5, 3, 3, 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, 1, 1, 1, 1, 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 02:28:15,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:28:15,473 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash -595449413, now seen corresponding path program 1 times [2021-11-23 02:28:15,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:15,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975171750] [2021-11-23 02:28:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:15,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1537 trivial. 0 not checked. [2021-11-23 02:28:15,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:15,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975171750] [2021-11-23 02:28:15,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975171750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:15,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:15,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:15,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070570192] [2021-11-23 02:28:15,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:15,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:15,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:15,810 INFO L87 Difference]: Start difference. First operand 19737 states and 28087 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-23 02:28:18,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:21,375 INFO L93 Difference]: Finished difference Result 47761 states and 67922 transitions. [2021-11-23 02:28:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 408 [2021-11-23 02:28:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:21,554 INFO L225 Difference]: With dead ends: 47761 [2021-11-23 02:28:21,555 INFO L226 Difference]: Without dead ends: 28074 [2021-11-23 02:28:21,664 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 02:28:21,667 INFO L933 BasicCegarLoop]: 2837 mSDtfsCounter, 1953 mSDsluCounter, 2373 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 5000 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:21,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1953 Valid, 5000 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 02:28:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28074 states. [2021-11-23 02:28:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28074 to 27975. [2021-11-23 02:28:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27975 states, 15547 states have (on average 1.2523959606354924) internal successors, (19471), 15950 states have internal predecessors, (19471), 10145 states have call successors, (10145), 2295 states have call predecessors, (10145), 2282 states have return successors, (10180), 10005 states have call predecessors, (10180), 10144 states have call successors, (10180) [2021-11-23 02:28:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27975 states to 27975 states and 39796 transitions. [2021-11-23 02:28:23,541 INFO L78 Accepts]: Start accepts. Automaton has 27975 states and 39796 transitions. Word has length 408 [2021-11-23 02:28:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:23,543 INFO L470 AbstractCegarLoop]: Abstraction has 27975 states and 39796 transitions. [2021-11-23 02:28:23,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-23 02:28:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 27975 states and 39796 transitions. [2021-11-23 02:28:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-23 02:28:23,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:23,603 INFO L514 BasicCegarLoop]: trace histogram [18, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 8, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:23,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:28:23,603 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash -660412124, now seen corresponding path program 1 times [2021-11-23 02:28:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:23,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383489351] [2021-11-23 02:28:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:23,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2021-11-23 02:28:23,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383489351] [2021-11-23 02:28:23,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383489351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:23,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:23,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:23,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181829189] [2021-11-23 02:28:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:23,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:23,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:23,950 INFO L87 Difference]: Start difference. First operand 27975 states and 39796 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-23 02:28:28,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:32,606 INFO L93 Difference]: Finished difference Result 71665 states and 101706 transitions. [2021-11-23 02:28:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 511 [2021-11-23 02:28:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:32,841 INFO L225 Difference]: With dead ends: 71665 [2021-11-23 02:28:32,842 INFO L226 Difference]: Without dead ends: 43740 [2021-11-23 02:28:32,936 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 02:28:32,937 INFO L933 BasicCegarLoop]: 3958 mSDtfsCounter, 2069 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2069 SdHoareTripleChecker+Valid, 6173 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:32,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2069 Valid, 6173 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 627 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2021-11-23 02:28:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43740 states. [2021-11-23 02:28:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43740 to 43709. [2021-11-23 02:28:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43709 states, 24527 states have (on average 1.2548619888286379) internal successors, (30778), 25103 states have internal predecessors, (30778), 15557 states have call successors, (15557), 3637 states have call predecessors, (15557), 3624 states have return successors, (15592), 15386 states have call predecessors, (15592), 15556 states have call successors, (15592) [2021-11-23 02:28:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43709 states to 43709 states and 61927 transitions. [2021-11-23 02:28:35,194 INFO L78 Accepts]: Start accepts. Automaton has 43709 states and 61927 transitions. Word has length 511 [2021-11-23 02:28:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:35,195 INFO L470 AbstractCegarLoop]: Abstraction has 43709 states and 61927 transitions. [2021-11-23 02:28:35,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-23 02:28:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 43709 states and 61927 transitions. [2021-11-23 02:28:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-11-23 02:28:35,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:35,594 INFO L514 BasicCegarLoop]: trace histogram [18, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 8, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:35,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:28:35,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash -205763502, now seen corresponding path program 1 times [2021-11-23 02:28:35,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:35,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398569238] [2021-11-23 02:28:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:35,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1384 trivial. 0 not checked. [2021-11-23 02:28:36,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:36,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398569238] [2021-11-23 02:28:36,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398569238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:36,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:36,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:36,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288834439] [2021-11-23 02:28:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:36,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:36,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:36,119 INFO L87 Difference]: Start difference. First operand 43709 states and 61927 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-23 02:28:37,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:39,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:41,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:43,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:44,958 INFO L93 Difference]: Finished difference Result 87377 states and 123798 transitions. [2021-11-23 02:28:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 534 [2021-11-23 02:28:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:45,398 INFO L225 Difference]: With dead ends: 87377 [2021-11-23 02:28:45,399 INFO L226 Difference]: Without dead ends: 43700 [2021-11-23 02:28:45,572 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 02:28:45,573 INFO L933 BasicCegarLoop]: 2305 mSDtfsCounter, 0 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4607 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:45,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4607 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 448 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 02:28:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43700 states. [2021-11-23 02:28:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43700 to 43682. [2021-11-23 02:28:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43682 states, 24500 states have (on average 1.2544081632653061) internal successors, (30733), 25085 states have internal predecessors, (30733), 15557 states have call successors, (15557), 3637 states have call predecessors, (15557), 3624 states have return successors, (15592), 15377 states have call predecessors, (15592), 15556 states have call successors, (15592) [2021-11-23 02:28:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43682 states to 43682 states and 61882 transitions. [2021-11-23 02:28:47,618 INFO L78 Accepts]: Start accepts. Automaton has 43682 states and 61882 transitions. Word has length 534 [2021-11-23 02:28:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:47,619 INFO L470 AbstractCegarLoop]: Abstraction has 43682 states and 61882 transitions. [2021-11-23 02:28:47,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-23 02:28:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 43682 states and 61882 transitions. [2021-11-23 02:28:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-23 02:28:47,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:47,690 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 8, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:47,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:28:47,691 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash 414038897, now seen corresponding path program 1 times [2021-11-23 02:28:47,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56300185] [2021-11-23 02:28:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:47,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2133 trivial. 0 not checked. [2021-11-23 02:28:48,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:48,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56300185] [2021-11-23 02:28:48,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56300185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:48,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:48,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:48,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992329102] [2021-11-23 02:28:48,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:48,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:48,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:48,071 INFO L87 Difference]: Start difference. First operand 43682 states and 61882 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2021-11-23 02:28:49,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:52,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:55,548 INFO L93 Difference]: Finished difference Result 87566 states and 124185 transitions. [2021-11-23 02:28:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) Word has length 594 [2021-11-23 02:28:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:55,776 INFO L225 Difference]: With dead ends: 87566 [2021-11-23 02:28:55,776 INFO L226 Difference]: Without dead ends: 43934 [2021-11-23 02:28:55,941 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 02:28:55,942 INFO L933 BasicCegarLoop]: 2307 mSDtfsCounter, 2 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4603 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:55,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 4603 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 454 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 02:28:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43934 states. [2021-11-23 02:28:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43934 to 43718. [2021-11-23 02:28:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43718 states, 24536 states have (on average 1.254034887512227) internal successors, (30769), 25121 states have internal predecessors, (30769), 15557 states have call successors, (15557), 3637 states have call predecessors, (15557), 3624 states have return successors, (15592), 15377 states have call predecessors, (15592), 15556 states have call successors, (15592) [2021-11-23 02:28:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43718 states to 43718 states and 61918 transitions. [2021-11-23 02:28:57,944 INFO L78 Accepts]: Start accepts. Automaton has 43718 states and 61918 transitions. Word has length 594 [2021-11-23 02:28:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:57,945 INFO L470 AbstractCegarLoop]: Abstraction has 43718 states and 61918 transitions. [2021-11-23 02:28:57,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2021-11-23 02:28:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43718 states and 61918 transitions. [2021-11-23 02:28:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2021-11-23 02:28:57,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:57,980 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:57,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:28:57,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash -47934746, now seen corresponding path program 1 times [2021-11-23 02:28:57,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:57,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920590287] [2021-11-23 02:28:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:57,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2021-11-23 02:28:58,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:58,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920590287] [2021-11-23 02:28:58,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920590287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:58,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556169866] [2021-11-23 02:28:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:58,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:58,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:58,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:29:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 5262 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2021-11-23 02:29:01,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:01,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556169866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:01,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:01,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:29:01,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478483419] [2021-11-23 02:29:01,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:01,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:01,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:01,126 INFO L87 Difference]: Start difference. First operand 43718 states and 61918 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 2 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:29:04,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:07,643 INFO L93 Difference]: Finished difference Result 87710 states and 124365 transitions. [2021-11-23 02:29:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 2 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 609 [2021-11-23 02:29:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:07,898 INFO L225 Difference]: With dead ends: 87710 [2021-11-23 02:29:07,898 INFO L226 Difference]: Without dead ends: 44042 [2021-11-23 02:29:08,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:08,070 INFO L933 BasicCegarLoop]: 2307 mSDtfsCounter, 3 mSDsluCounter, 2517 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4601 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:08,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 4601 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 02:29:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44042 states. [2021-11-23 02:29:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44042 to 43754. [2021-11-23 02:29:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43754 states, 24572 states have (on average 1.2536627055184764) internal successors, (30805), 25157 states have internal predecessors, (30805), 15557 states have call successors, (15557), 3637 states have call predecessors, (15557), 3624 states have return successors, (15592), 15377 states have call predecessors, (15592), 15556 states have call successors, (15592) [2021-11-23 02:29:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43754 states to 43754 states and 61954 transitions. [2021-11-23 02:29:09,929 INFO L78 Accepts]: Start accepts. Automaton has 43754 states and 61954 transitions. Word has length 609 [2021-11-23 02:29:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:09,930 INFO L470 AbstractCegarLoop]: Abstraction has 43754 states and 61954 transitions. [2021-11-23 02:29:09,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 2 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:29:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 43754 states and 61954 transitions. [2021-11-23 02:29:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-11-23 02:29:09,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:09,981 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 14, 13, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:10,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:10,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:10,198 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1769923431, now seen corresponding path program 1 times [2021-11-23 02:29:10,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:10,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024722493] [2021-11-23 02:29:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:10,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2326 trivial. 0 not checked. [2021-11-23 02:29:10,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024722493] [2021-11-23 02:29:10,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024722493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768695410] [2021-11-23 02:29:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:10,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:10,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:10,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:29:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 5341 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 361 proven. 0 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2021-11-23 02:29:13,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768695410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:13,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:13,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:29:13,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591722007] [2021-11-23 02:29:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:13,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:13,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:13,359 INFO L87 Difference]: Start difference. First operand 43754 states and 61954 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-23 02:29:15,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:16,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:20,835 INFO L93 Difference]: Finished difference Result 98103 states and 141285 transitions. [2021-11-23 02:29:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 628 [2021-11-23 02:29:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:21,093 INFO L225 Difference]: With dead ends: 98103 [2021-11-23 02:29:21,093 INFO L226 Difference]: Without dead ends: 54399 [2021-11-23 02:29:21,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:21,273 INFO L933 BasicCegarLoop]: 2975 mSDtfsCounter, 551 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 5394 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:21,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 5394 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 02:29:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54399 states. [2021-11-23 02:29:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54399 to 43772. [2021-11-23 02:29:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43772 states, 24590 states have (on average 1.2534770231801546) internal successors, (30823), 25175 states have internal predecessors, (30823), 15557 states have call successors, (15557), 3637 states have call predecessors, (15557), 3624 states have return successors, (15592), 15377 states have call predecessors, (15592), 15556 states have call successors, (15592) [2021-11-23 02:29:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43772 states to 43772 states and 61972 transitions. [2021-11-23 02:29:23,627 INFO L78 Accepts]: Start accepts. Automaton has 43772 states and 61972 transitions. Word has length 628 [2021-11-23 02:29:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:23,628 INFO L470 AbstractCegarLoop]: Abstraction has 43772 states and 61972 transitions. [2021-11-23 02:29:23,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-23 02:29:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 43772 states and 61972 transitions. [2021-11-23 02:29:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2021-11-23 02:29:23,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:23,685 INFO L514 BasicCegarLoop]: trace histogram [22, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:23,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:23,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:29:23,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1466093148, now seen corresponding path program 1 times [2021-11-23 02:29:23,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:23,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917802727] [2021-11-23 02:29:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:23,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2021-11-23 02:29:24,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:24,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917802727] [2021-11-23 02:29:24,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917802727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:24,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529275109] [2021-11-23 02:29:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:24,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:24,607 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:24,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:29:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 5603 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 2210 trivial. 0 not checked. [2021-11-23 02:29:26,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:26,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529275109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:26,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:26,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:29:26,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411130996] [2021-11-23 02:29:26,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:26,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:26,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:26,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:26,971 INFO L87 Difference]: Start difference. First operand 43772 states and 61972 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2021-11-23 02:29:29,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:32,535 INFO L93 Difference]: Finished difference Result 96818 states and 139117 transitions. [2021-11-23 02:29:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:32,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 687 [2021-11-23 02:29:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:32,720 INFO L225 Difference]: With dead ends: 96818 [2021-11-23 02:29:32,720 INFO L226 Difference]: Without dead ends: 53096 [2021-11-23 02:29:33,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:33,049 INFO L933 BasicCegarLoop]: 3174 mSDtfsCounter, 616 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 5674 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:33,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 5674 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 520 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 02:29:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53096 states. [2021-11-23 02:29:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53096 to 43880. [2021-11-23 02:29:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43880 states, 24662 states have (on average 1.2534668721109399) internal successors, (30913), 25247 states have internal predecessors, (30913), 15593 states have call successors, (15593), 3637 states have call predecessors, (15593), 3624 states have return successors, (15628), 15413 states have call predecessors, (15628), 15592 states have call successors, (15628) [2021-11-23 02:29:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43880 states to 43880 states and 62134 transitions. [2021-11-23 02:29:34,811 INFO L78 Accepts]: Start accepts. Automaton has 43880 states and 62134 transitions. Word has length 687 [2021-11-23 02:29:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:34,812 INFO L470 AbstractCegarLoop]: Abstraction has 43880 states and 62134 transitions. [2021-11-23 02:29:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2021-11-23 02:29:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 43880 states and 62134 transitions. [2021-11-23 02:29:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2021-11-23 02:29:34,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:34,867 INFO L514 BasicCegarLoop]: trace histogram [22, 20, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:34,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:35,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:29:35,082 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1804642065, now seen corresponding path program 1 times [2021-11-23 02:29:35,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:35,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150752941] [2021-11-23 02:29:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:35,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2877 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 2836 trivial. 0 not checked. [2021-11-23 02:29:35,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:35,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150752941] [2021-11-23 02:29:35,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150752941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:35,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143603459] [2021-11-23 02:29:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:35,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:35,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:35,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:35,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:29:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:37,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 5629 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2877 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2021-11-23 02:29:38,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:38,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143603459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:38,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:38,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:29:38,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762385602] [2021-11-23 02:29:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:38,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:38,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:38,088 INFO L87 Difference]: Start difference. First operand 43880 states and 62134 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2021-11-23 02:29:39,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:41,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:43,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:46,301 INFO L93 Difference]: Finished difference Result 88898 states and 126297 transitions. [2021-11-23 02:29:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) Word has length 696 [2021-11-23 02:29:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:46,460 INFO L225 Difference]: With dead ends: 88898 [2021-11-23 02:29:46,460 INFO L226 Difference]: Without dead ends: 45068 [2021-11-23 02:29:46,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:46,577 INFO L933 BasicCegarLoop]: 2308 mSDtfsCounter, 13 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 4591 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:46,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 4591 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-23 02:29:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45068 states. [2021-11-23 02:29:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45068 to 44060. [2021-11-23 02:29:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44060 states, 24842 states have (on average 1.2516303035182352) internal successors, (31093), 25427 states have internal predecessors, (31093), 15593 states have call successors, (15593), 3637 states have call predecessors, (15593), 3624 states have return successors, (15628), 15413 states have call predecessors, (15628), 15592 states have call successors, (15628) [2021-11-23 02:29:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44060 states to 44060 states and 62314 transitions. [2021-11-23 02:29:48,814 INFO L78 Accepts]: Start accepts. Automaton has 44060 states and 62314 transitions. Word has length 696 [2021-11-23 02:29:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:48,815 INFO L470 AbstractCegarLoop]: Abstraction has 44060 states and 62314 transitions. [2021-11-23 02:29:48,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2021-11-23 02:29:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 44060 states and 62314 transitions. [2021-11-23 02:29:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2021-11-23 02:29:48,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:48,855 INFO L514 BasicCegarLoop]: trace histogram [26, 21, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:48,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:49,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:49,057 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1567134916, now seen corresponding path program 1 times [2021-11-23 02:29:49,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564843598] [2021-11-23 02:29:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:49,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-23 02:29:49,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:49,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564843598] [2021-11-23 02:29:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564843598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:49,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431887909] [2021-11-23 02:29:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:49,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:49,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:49,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:49,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:29:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 5787 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:50,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 2698 trivial. 0 not checked. [2021-11-23 02:29:52,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:52,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431887909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:52,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:52,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:29:52,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357519312] [2021-11-23 02:29:52,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:52,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:52,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:52,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:52,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:52,115 INFO L87 Difference]: Start difference. First operand 44060 states and 62314 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (108), 3 states have call predecessors, (108), 3 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 02:29:55,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:57,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:59,614 INFO L93 Difference]: Finished difference Result 104270 states and 147240 transitions. [2021-11-23 02:29:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:59,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (108), 3 states have call predecessors, (108), 3 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 735 [2021-11-23 02:29:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:59,841 INFO L225 Difference]: With dead ends: 104270 [2021-11-23 02:29:59,842 INFO L226 Difference]: Without dead ends: 60260 [2021-11-23 02:29:59,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:59,964 INFO L933 BasicCegarLoop]: 2775 mSDtfsCounter, 2047 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 4910 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:59,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 4910 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 532 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 02:30:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60260 states. [2021-11-23 02:30:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60260 to 58097. [2021-11-23 02:30:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58097 states, 32925 states have (on average 1.2508428246013668) internal successors, (41184), 33677 states have internal predecessors, (41184), 20220 states have call successors, (20220), 4970 states have call predecessors, (20220), 4951 states have return successors, (20267), 19985 states have call predecessors, (20267), 20219 states have call successors, (20267) [2021-11-23 02:30:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58097 states to 58097 states and 81671 transitions. [2021-11-23 02:30:02,659 INFO L78 Accepts]: Start accepts. Automaton has 58097 states and 81671 transitions. Word has length 735 [2021-11-23 02:30:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:02,661 INFO L470 AbstractCegarLoop]: Abstraction has 58097 states and 81671 transitions. [2021-11-23 02:30:02,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (108), 3 states have call predecessors, (108), 3 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 02:30:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 58097 states and 81671 transitions. [2021-11-23 02:30:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2021-11-23 02:30:02,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:02,729 INFO L514 BasicCegarLoop]: trace histogram [26, 21, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:02,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:02,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:30:02,934 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash -7132655, now seen corresponding path program 1 times [2021-11-23 02:30:02,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:02,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655459683] [2021-11-23 02:30:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:02,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3148 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 3096 trivial. 0 not checked. [2021-11-23 02:30:03,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655459683] [2021-11-23 02:30:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655459683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535193852] [2021-11-23 02:30:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:03,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:03,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:03,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:30:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 5835 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:30:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3148 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 3036 trivial. 0 not checked. [2021-11-23 02:30:05,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:05,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535193852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:05,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:05,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:30:05,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700594686] [2021-11-23 02:30:05,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:05,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:05,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:05,889 INFO L87 Difference]: Start difference. First operand 58097 states and 81671 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2021-11-23 02:30:08,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:10,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:12,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:15,271 INFO L93 Difference]: Finished difference Result 116432 states and 163825 transitions. [2021-11-23 02:30:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:30:15,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) Word has length 756 [2021-11-23 02:30:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:15,471 INFO L225 Difference]: With dead ends: 116432 [2021-11-23 02:30:15,471 INFO L226 Difference]: Without dead ends: 58385 [2021-11-23 02:30:15,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 756 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:15,606 INFO L933 BasicCegarLoop]: 2304 mSDtfsCounter, 5 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4603 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:15,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4603 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 02:30:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58385 states. [2021-11-23 02:30:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58385 to 58133. [2021-11-23 02:30:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58133 states, 32961 states have (on average 1.2505688541003004) internal successors, (41220), 33713 states have internal predecessors, (41220), 20220 states have call successors, (20220), 4970 states have call predecessors, (20220), 4951 states have return successors, (20267), 19985 states have call predecessors, (20267), 20219 states have call successors, (20267) [2021-11-23 02:30:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58133 states to 58133 states and 81707 transitions. [2021-11-23 02:30:18,193 INFO L78 Accepts]: Start accepts. Automaton has 58133 states and 81707 transitions. Word has length 756 [2021-11-23 02:30:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:18,194 INFO L470 AbstractCegarLoop]: Abstraction has 58133 states and 81707 transitions. [2021-11-23 02:30:18,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 2 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2021-11-23 02:30:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 58133 states and 81707 transitions. [2021-11-23 02:30:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2021-11-23 02:30:18,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:18,252 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:18,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:18,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:30:18,453 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:18,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash -21261603, now seen corresponding path program 1 times [2021-11-23 02:30:18,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248011506] [2021-11-23 02:30:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:18,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 3138 trivial. 0 not checked. [2021-11-23 02:30:19,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248011506] [2021-11-23 02:30:19,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248011506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918844843] [2021-11-23 02:30:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:19,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:19,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:19,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:19,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e08dc-3260-4b41-a92a-1b5e04965605/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:30:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 5853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:30:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 3100 trivial. 0 not checked. [2021-11-23 02:30:21,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:30:21,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918844843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:21,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:30:21,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:30:21,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117087044] [2021-11-23 02:30:21,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:21,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:30:21,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:30:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:21,367 INFO L87 Difference]: Start difference. First operand 58133 states and 81707 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 2 states have call successors, (106), 2 states have call predecessors, (106), 2 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-23 02:30:23,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []