./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--dec--tulip--de4x5.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_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/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_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/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--dec--tulip--de4x5.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/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_1e1e5db1-f17a-4dec-a928-1fde96589da9/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 7a2974a33527a9392dca8d355734fee3e0faaae6e14749128119c28fd0f37e8f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:44:58,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:44:58,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:44:58,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:44:58,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:44:58,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:44:58,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:44:58,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:44:58,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:44:58,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:44:58,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:44:58,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:44:58,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:44:58,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:44:58,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:44:58,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:44:58,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:44:58,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:44:58,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:44:58,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:44:58,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:44:58,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:44:58,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:44:58,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:44:58,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:44:58,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:44:58,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:44:58,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:44:58,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:44:58,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:44:58,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:44:58,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:44:58,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:44:58,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:44:58,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:44:58,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:44:58,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:44:58,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:44:58,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:44:58,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:44:58,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:44:58,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:44:58,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:44:58,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:44:58,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:44:58,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:44:58,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:44:58,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:44:58,639 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:44:58,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:44:58,640 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:44:58,640 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:44:58,642 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:44:58,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:44:58,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:44:58,643 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:44:58,643 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:44:58,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:44:58,644 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:44:58,644 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:44:58,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:44:58,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:44:58,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:44:58,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:44:58,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:44:58,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:44:58,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:44:58,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:44:58,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:44:58,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:44:58,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:44:58,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:58,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:44:58,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:44:58,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:44:58,652 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:44:58,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:44:58,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:44:58,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:44:58,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:44:58,654 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_1e1e5db1-f17a-4dec-a928-1fde96589da9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a2974a33527a9392dca8d355734fee3e0faaae6e14749128119c28fd0f37e8f [2021-11-23 02:44:59,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:44:59,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:44:59,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:44:59,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:44:59,034 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:44:59,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-23 02:44:59,097 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/data/56f201434/73b84a2a7e8d4b2d9c49652559675876/FLAGcb7a4da98 [2021-11-23 02:45:00,385 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:45:00,386 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-23 02:45:00,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/data/56f201434/73b84a2a7e8d4b2d9c49652559675876/FLAGcb7a4da98 [2021-11-23 02:45:00,544 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/data/56f201434/73b84a2a7e8d4b2d9c49652559675876 [2021-11-23 02:45:00,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:45:00,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:45:00,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:00,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:45:00,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:45:00,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:00" (1/1) ... [2021-11-23 02:45:00,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42edc553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:00, skipping insertion in model container [2021-11-23 02:45:00,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:00" (1/1) ... [2021-11-23 02:45:00,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:45:00,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:45:04,352 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_1e1e5db1-f17a-4dec-a928-1fde96589da9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i[386204,386217] [2021-11-23 02:45:04,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:04,565 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:45:05,369 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_1e1e5db1-f17a-4dec-a928-1fde96589da9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i[386204,386217] [2021-11-23 02:45:05,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:05,570 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:45:05,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05 WrapperNode [2021-11-23 02:45:05,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:05,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:05,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:45:05,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:45:05,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:05,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,104 INFO L137 Inliner]: procedures = 333, calls = 3594, calls flagged for inlining = 139, calls inlined = 136, statements flattened = 6651 [2021-11-23 02:45:06,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:06,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:45:06,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:45:06,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:45:06,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:45:06,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:45:06,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:45:06,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:45:06,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (1/1) ... [2021-11-23 02:45:06,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:06,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:06,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:45:06,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:45:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure disable_ast [2021-11-23 02:45:06,934 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_ast [2021-11-23 02:45:06,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-23 02:45:06,934 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-23 02:45:06,934 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2021-11-23 02:45:06,935 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2021-11-23 02:45:06,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:45:06,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:45:06,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:45:06,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:45:06,936 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_interrupt [2021-11-23 02:45:06,936 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_interrupt [2021-11-23 02:45:06,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:45:06,936 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:45:06,936 INFO L130 BoogieDeclarations]: Found specification of procedure reset_init_sia [2021-11-23 02:45:06,936 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_init_sia [2021-11-23 02:45:06,937 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-23 02:45:06,937 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-23 02:45:06,937 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:45:06,937 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:45:06,937 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_alloc_rx_buff [2021-11-23 02:45:06,938 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_alloc_rx_buff [2021-11-23 02:45:06,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 02:45:06,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 02:45:06,938 INFO L130 BoogieDeclarations]: Found specification of procedure test_for_100Mb [2021-11-23 02:45:06,938 INFO L138 BoogieDeclarations]: Found implementation of procedure test_for_100Mb [2021-11-23 02:45:06,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:45:06,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:45:06,939 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2021-11-23 02:45:06,939 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2021-11-23 02:45:06,939 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_put_cache [2021-11-23 02:45:06,940 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_put_cache [2021-11-23 02:45:06,940 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-23 02:45:06,940 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-23 02:45:06,940 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2021-11-23 02:45:06,940 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2021-11-23 02:45:06,940 INFO L130 BoogieDeclarations]: Found specification of procedure load_packet [2021-11-23 02:45:06,941 INFO L138 BoogieDeclarations]: Found implementation of procedure load_packet [2021-11-23 02:45:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:45:06,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:45:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_mii [2021-11-23 02:45:06,942 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_mii [2021-11-23 02:45:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2021-11-23 02:45:06,942 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2021-11-23 02:45:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_switch_mac_port [2021-11-23 02:45:06,943 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_switch_mac_port [2021-11-23 02:45:06,943 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:45:06,944 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:45:06,944 INFO L130 BoogieDeclarations]: Found specification of procedure srom_latch [2021-11-23 02:45:06,945 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_latch [2021-11-23 02:45:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure is_100_up [2021-11-23 02:45:06,946 INFO L138 BoogieDeclarations]: Found implementation of procedure is_100_up [2021-11-23 02:45:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2021-11-23 02:45:06,946 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2021-11-23 02:45:06,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:45:06,947 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:45:06,947 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ta [2021-11-23 02:45:06,947 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ta [2021-11-23 02:45:06,947 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2021-11-23 02:45:06,948 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2021-11-23 02:45:06,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:45:06,949 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:45:06,949 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:45:06,949 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:45:06,949 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2021-11-23 02:45:06,949 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2021-11-23 02:45:06,949 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le16 [2021-11-23 02:45:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le16 [2021-11-23 02:45:06,950 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:45:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:45:06,950 INFO L130 BoogieDeclarations]: Found specification of procedure build_setup_frame [2021-11-23 02:45:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure build_setup_frame [2021-11-23 02:45:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2021-11-23 02:45:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2021-11-23 02:45:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure test_mii_reg [2021-11-23 02:45:06,951 INFO L138 BoogieDeclarations]: Found implementation of procedure test_mii_reg [2021-11-23 02:45:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2021-11-23 02:45:06,952 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2021-11-23 02:45:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_cache_state [2021-11-23 02:45:06,953 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_cache_state [2021-11-23 02:45:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-23 02:45:06,953 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-23 02:45:06,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:45:06,954 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_media [2021-11-23 02:45:06,954 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_media [2021-11-23 02:45:06,955 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2021-11-23 02:45:06,955 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2021-11-23 02:45:06,955 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 02:45:06,955 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2021-11-23 02:45:06,956 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2021-11-23 02:45:06,956 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2021-11-23 02:45:06,957 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2021-11-23 02:45:06,957 INFO L130 BoogieDeclarations]: Found specification of procedure mii_rd [2021-11-23 02:45:06,958 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_rd [2021-11-23 02:45:06,958 INFO L130 BoogieDeclarations]: Found specification of procedure DevicePresent [2021-11-23 02:45:06,958 INFO L138 BoogieDeclarations]: Found implementation of procedure DevicePresent [2021-11-23 02:45:06,958 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-23 02:45:06,958 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-23 02:45:06,959 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2021-11-23 02:45:06,959 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2021-11-23 02:45:06,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:45:06,959 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2021-11-23 02:45:06,960 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2021-11-23 02:45:06,960 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-23 02:45:06,960 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-23 02:45:06,960 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:45:06,961 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:45:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 02:45:06,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 02:45:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:45:06,962 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:45:06,963 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le32 [2021-11-23 02:45:06,966 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le32 [2021-11-23 02:45:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-23 02:45:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_sw_reset [2021-11-23 02:45:06,966 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_sw_reset [2021-11-23 02:45:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:45:06,969 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-23 02:45:06,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-23 02:45:06,969 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-23 02:45:06,970 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-23 02:45:06,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:45:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure is_10_up [2021-11-23 02:45:06,978 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10_up [2021-11-23 02:45:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-23 02:45:06,978 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-23 02:45:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-23 02:45:06,978 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-23 02:45:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure is_anc_capable [2021-11-23 02:45:06,979 INFO L138 BoogieDeclarations]: Found implementation of procedure is_anc_capable [2021-11-23 02:45:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-23 02:45:06,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-23 02:45:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2021-11-23 02:45:06,979 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2021-11-23 02:45:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-23 02:45:06,980 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-23 02:45:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:45:06,980 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:45:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:45:06,980 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:45:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure is_spd_100 [2021-11-23 02:45:06,981 INFO L138 BoogieDeclarations]: Found implementation of procedure is_spd_100 [2021-11-23 02:45:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2021-11-23 02:45:06,981 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2021-11-23 02:45:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:45:06,981 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:45:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:45:06,982 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:45:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-23 02:45:06,982 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-23 02:45:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_queue_pkt [2021-11-23 02:45:06,982 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_queue_pkt [2021-11-23 02:45:06,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:45:06,983 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_mii [2021-11-23 02:45:06,983 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_mii [2021-11-23 02:45:06,983 INFO L130 BoogieDeclarations]: Found specification of procedure test_media [2021-11-23 02:45:06,983 INFO L138 BoogieDeclarations]: Found implementation of procedure test_media [2021-11-23 02:45:06,983 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_rx_buffs [2021-11-23 02:45:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_rx_buffs [2021-11-23 02:45:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:45:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:45:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:45:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:45:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 02:45:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 02:45:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buffs [2021-11-23 02:45:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buffs [2021-11-23 02:45:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:45:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-23 02:45:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-23 02:45:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-23 02:45:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-23 02:45:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:45:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:45:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:45:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:45:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:45:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2021-11-23 02:45:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2021-11-23 02:45:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:45:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:45:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2021-11-23 02:45:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2021-11-23 02:45:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure ping_media [2021-11-23 02:45:06,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ping_media [2021-11-23 02:45:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:45:06,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:45:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-23 02:45:06,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-23 02:45:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2021-11-23 02:45:06,989 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2021-11-23 02:45:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:45:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure srom_exec [2021-11-23 02:45:06,989 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_exec [2021-11-23 02:45:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:45:06,989 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:45:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:45:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:45:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:45:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:45:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_tx [2021-11-23 02:45:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_tx [2021-11-23 02:45:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:45:06,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:45:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure gep_wr [2021-11-23 02:45:06,991 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_wr [2021-11-23 02:45:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-23 02:45:06,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-23 02:45:06,991 INFO L130 BoogieDeclarations]: Found specification of procedure srom_rd [2021-11-23 02:45:06,991 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_rd [2021-11-23 02:45:06,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:45:06,992 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:45:06,992 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:45:06,992 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_srom [2021-11-23 02:45:06,992 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_srom [2021-11-23 02:45:06,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:45:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:45:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure SetMulticastFilter [2021-11-23 02:45:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMulticastFilter [2021-11-23 02:45:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:45:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:45:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:45:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ioctl [2021-11-23 02:45:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ioctl [2021-11-23 02:45:06,994 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_cache [2021-11-23 02:45:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_cache [2021-11-23 02:45:06,994 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:45:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:45:06,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:45:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 02:45:06,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 02:45:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_srom [2021-11-23 02:45:06,995 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_srom [2021-11-23 02:45:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_3 [2021-11-23 02:45:06,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_3 [2021-11-23 02:45:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-23 02:45:06,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-23 02:45:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:45:06,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure mii_swap [2021-11-23 02:45:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_swap [2021-11-23 02:45:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2021-11-23 02:45:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2021-11-23 02:45:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_mii [2021-11-23 02:45:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_mii [2021-11-23 02:45:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2021-11-23 02:45:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2021-11-23 02:45:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure gep_rd [2021-11-23 02:45:07,003 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_rd [2021-11-23 02:45:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure mii_address [2021-11-23 02:45:07,006 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_address [2021-11-23 02:45:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_reset_phy [2021-11-23 02:45:07,006 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_reset_phy [2021-11-23 02:45:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_putb_cache [2021-11-23 02:45:07,007 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_putb_cache [2021-11-23 02:45:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buff [2021-11-23 02:45:07,007 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buff [2021-11-23 02:45:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_setup_intr [2021-11-23 02:45:07,007 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_setup_intr [2021-11-23 02:45:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2021-11-23 02:45:07,008 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2021-11-23 02:45:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_stats [2021-11-23 02:45:07,008 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_stats [2021-11-23 02:45:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_save_skbs [2021-11-23 02:45:07,008 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_save_skbs [2021-11-23 02:45:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2021-11-23 02:45:07,009 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2021-11-23 02:45:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-23 02:45:07,009 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-23 02:45:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-23 02:45:07,009 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-23 02:45:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure srom_map_media [2021-11-23 02:45:07,009 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_map_media [2021-11-23 02:45:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-23 02:45:07,010 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-23 02:45:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_close [2021-11-23 02:45:07,010 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_close [2021-11-23 02:45:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure yawn [2021-11-23 02:45:07,010 INFO L138 BoogieDeclarations]: Found implementation of procedure yawn [2021-11-23 02:45:07,011 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wdata [2021-11-23 02:45:07,011 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wdata [2021-11-23 02:45:07,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:45:07,011 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init_connection [2021-11-23 02:45:07,011 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init_connection [2021-11-23 02:45:07,011 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wr [2021-11-23 02:45:07,011 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wr [2021-11-23 02:45:07,012 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-23 02:45:07,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:45:07,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:45:07,012 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_state [2021-11-23 02:45:07,012 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_state [2021-11-23 02:45:08,175 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:45:08,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:45:08,703 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:45:25,155 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:45:29,379 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:45:29,380 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-23 02:45:29,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:29 BoogieIcfgContainer [2021-11-23 02:45:29,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:45:29,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:45:29,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:45:29,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:45:29,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:00" (1/3) ... [2021-11-23 02:45:29,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac80c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:29, skipping insertion in model container [2021-11-23 02:45:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:05" (2/3) ... [2021-11-23 02:45:29,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac80c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:29, skipping insertion in model container [2021-11-23 02:45:29,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:29" (3/3) ... [2021-11-23 02:45:29,399 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-23 02:45:29,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:45:29,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:45:29,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:45:29,520 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 02:45:29,524 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:45:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 2706 states, 1731 states have (on average 1.3575967648757943) internal successors, (2350), 1793 states have internal predecessors, (2350), 854 states have call successors, (854), 136 states have call predecessors, (854), 135 states have return successors, (846), 835 states have call predecessors, (846), 846 states have call successors, (846) [2021-11-23 02:45:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:45:29,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:29,661 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:29,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1596020278, now seen corresponding path program 1 times [2021-11-23 02:45:29,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:29,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217864774] [2021-11-23 02:45:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:29,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 02:45:30,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:30,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217864774] [2021-11-23 02:45:30,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217864774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:30,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:30,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:45:30,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248810512] [2021-11-23 02:45:30,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:30,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:30,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:30,523 INFO L87 Difference]: Start difference. First operand has 2706 states, 1731 states have (on average 1.3575967648757943) internal successors, (2350), 1793 states have internal predecessors, (2350), 854 states have call successors, (854), 136 states have call predecessors, (854), 135 states have return successors, (846), 835 states have call predecessors, (846), 846 states have call successors, (846) Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:45:32,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:40,051 INFO L93 Difference]: Finished difference Result 7765 states and 11873 transitions. [2021-11-23 02:45:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:45:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2021-11-23 02:45:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:40,144 INFO L225 Difference]: With dead ends: 7765 [2021-11-23 02:45:40,145 INFO L226 Difference]: Without dead ends: 5051 [2021-11-23 02:45:40,198 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 02:45:40,203 INFO L933 BasicCegarLoop]: 4430 mSDtfsCounter, 3578 mSDsluCounter, 3874 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3578 SdHoareTripleChecker+Valid, 7930 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:40,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3578 Valid, 7930 Invalid, 850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 843 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-23 02:45:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-11-23 02:45:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 5045. [2021-11-23 02:45:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 3207 states have (on average 1.3489242282507017) internal successors, (4326), 3284 states have internal predecessors, (4326), 1578 states have call successors, (1578), 260 states have call predecessors, (1578), 259 states have return successors, (1577), 1555 states have call predecessors, (1577), 1577 states have call successors, (1577) [2021-11-23 02:45:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 7481 transitions. [2021-11-23 02:45:40,986 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 7481 transitions. Word has length 102 [2021-11-23 02:45:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:40,988 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 7481 transitions. [2021-11-23 02:45:40,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:45:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 7481 transitions. [2021-11-23 02:45:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 02:45:41,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:41,004 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:45:41,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:45:41,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -631487762, now seen corresponding path program 1 times [2021-11-23 02:45:41,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689573966] [2021-11-23 02:45:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:41,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:45:41,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689573966] [2021-11-23 02:45:41,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689573966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:41,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:41,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:45:41,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650118092] [2021-11-23 02:45:41,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:45:41,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:45:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:45:41,491 INFO L87 Difference]: Start difference. First operand 5045 states and 7481 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:45:43,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:55,453 INFO L93 Difference]: Finished difference Result 15121 states and 22576 transitions. [2021-11-23 02:45:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:45:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2021-11-23 02:45:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:55,605 INFO L225 Difference]: With dead ends: 15121 [2021-11-23 02:45:55,606 INFO L226 Difference]: Without dead ends: 10093 [2021-11-23 02:45:55,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:45:55,677 INFO L933 BasicCegarLoop]: 4812 mSDtfsCounter, 3917 mSDsluCounter, 14453 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 18026 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:55,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 18026 Invalid, 1707 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1703 Invalid, 1 Unknown, 0 Unchecked, 13.2s Time] [2021-11-23 02:45:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2021-11-23 02:45:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 10064. [2021-11-23 02:45:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10064 states, 6402 states have (on average 1.3495782567947516) internal successors, (8640), 6560 states have internal predecessors, (8640), 3144 states have call successors, (3144), 518 states have call predecessors, (3144), 517 states have return successors, (3288), 3091 states have call predecessors, (3288), 3143 states have call successors, (3288) [2021-11-23 02:45:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10064 states to 10064 states and 15072 transitions. [2021-11-23 02:45:56,686 INFO L78 Accepts]: Start accepts. Automaton has 10064 states and 15072 transitions. Word has length 131 [2021-11-23 02:45:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:56,689 INFO L470 AbstractCegarLoop]: Abstraction has 10064 states and 15072 transitions. [2021-11-23 02:45:56,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:45:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10064 states and 15072 transitions. [2021-11-23 02:45:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 02:45:56,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:56,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:45:56,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:45:56,698 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 414724431, now seen corresponding path program 1 times [2021-11-23 02:45:56,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:56,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801893028] [2021-11-23 02:45:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:56,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:45:56,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:56,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801893028] [2021-11-23 02:45:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801893028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:57,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:57,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:45:57,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073972462] [2021-11-23 02:45:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:57,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:45:57,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:45:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:45:57,004 INFO L87 Difference]: Start difference. First operand 10064 states and 15072 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:45:59,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:08,144 INFO L93 Difference]: Finished difference Result 30202 states and 45238 transitions. [2021-11-23 02:46:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:46:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 134 [2021-11-23 02:46:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:08,342 INFO L225 Difference]: With dead ends: 30202 [2021-11-23 02:46:08,343 INFO L226 Difference]: Without dead ends: 20155 [2021-11-23 02:46:08,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:46:08,437 INFO L933 BasicCegarLoop]: 4568 mSDtfsCounter, 3918 mSDsluCounter, 13858 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3922 SdHoareTripleChecker+Valid, 17219 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:08,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3922 Valid, 17219 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1645 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 02:46:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-23 02:46:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20112. [2021-11-23 02:46:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20112 states, 12794 states have (on average 1.349851492887291) internal successors, (17270), 13126 states have internal predecessors, (17270), 6280 states have call successors, (6280), 1038 states have call predecessors, (6280), 1037 states have return successors, (6569), 6159 states have call predecessors, (6569), 6279 states have call successors, (6569) [2021-11-23 02:46:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20112 states to 20112 states and 30119 transitions. [2021-11-23 02:46:10,269 INFO L78 Accepts]: Start accepts. Automaton has 20112 states and 30119 transitions. Word has length 134 [2021-11-23 02:46:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:10,272 INFO L470 AbstractCegarLoop]: Abstraction has 20112 states and 30119 transitions. [2021-11-23 02:46:10,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20112 states and 30119 transitions. [2021-11-23 02:46:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 02:46:10,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:10,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:46:10,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:46:10,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1535226547, now seen corresponding path program 1 times [2021-11-23 02:46:10,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:10,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701664095] [2021-11-23 02:46:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:10,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:46:10,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701664095] [2021-11-23 02:46:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701664095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:10,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:10,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:46:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941224709] [2021-11-23 02:46:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:10,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:46:10,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:10,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:46:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:46:10,554 INFO L87 Difference]: Start difference. First operand 20112 states and 30119 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:12,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:19,614 INFO L93 Difference]: Finished difference Result 31511 states and 46984 transitions. [2021-11-23 02:46:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:46:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 135 [2021-11-23 02:46:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:19,830 INFO L225 Difference]: With dead ends: 31511 [2021-11-23 02:46:19,830 INFO L226 Difference]: Without dead ends: 20176 [2021-11-23 02:46:19,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:46:19,898 INFO L933 BasicCegarLoop]: 3546 mSDtfsCounter, 3912 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3916 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:19,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3916 Valid, 10625 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1155 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2021-11-23 02:46:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20176 states. [2021-11-23 02:46:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20176 to 20128. [2021-11-23 02:46:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 12810 states have (on average 1.3494145199063232) internal successors, (17286), 13138 states have internal predecessors, (17286), 6276 states have call successors, (6276), 1042 states have call predecessors, (6276), 1041 states have return successors, (6565), 6159 states have call predecessors, (6565), 6275 states have call successors, (6565) [2021-11-23 02:46:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 30127 transitions. [2021-11-23 02:46:21,335 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 30127 transitions. Word has length 135 [2021-11-23 02:46:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:21,336 INFO L470 AbstractCegarLoop]: Abstraction has 20128 states and 30127 transitions. [2021-11-23 02:46:21,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 30127 transitions. [2021-11-23 02:46:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 02:46:21,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:21,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:46:21,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:46:21,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash -803598729, now seen corresponding path program 1 times [2021-11-23 02:46:21,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:21,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984979294] [2021-11-23 02:46:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:21,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:46:21,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984979294] [2021-11-23 02:46:21,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984979294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:21,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:21,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:46:21,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147460312] [2021-11-23 02:46:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:21,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:46:21,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:46:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:46:21,576 INFO L87 Difference]: Start difference. First operand 20128 states and 30127 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:23,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:33,457 INFO L93 Difference]: Finished difference Result 41614 states and 62093 transitions. [2021-11-23 02:46:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:46:33,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 132 [2021-11-23 02:46:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:33,786 INFO L225 Difference]: With dead ends: 41614 [2021-11-23 02:46:33,786 INFO L226 Difference]: Without dead ends: 30263 [2021-11-23 02:46:33,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:46:33,862 INFO L933 BasicCegarLoop]: 4404 mSDtfsCounter, 3913 mSDsluCounter, 13527 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3917 SdHoareTripleChecker+Valid, 16800 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:33,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3917 Valid, 16800 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1537 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:46:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30263 states. [2021-11-23 02:46:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30263 to 30188. [2021-11-23 02:46:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30188 states, 19224 states have (on average 1.349250936329588) internal successors, (25938), 19700 states have internal predecessors, (25938), 9402 states have call successors, (9402), 1562 states have call predecessors, (9402), 1561 states have return successors, (9981), 9239 states have call predecessors, (9981), 9401 states have call successors, (9981) [2021-11-23 02:46:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30188 states to 30188 states and 45321 transitions. [2021-11-23 02:46:36,270 INFO L78 Accepts]: Start accepts. Automaton has 30188 states and 45321 transitions. Word has length 132 [2021-11-23 02:46:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:36,271 INFO L470 AbstractCegarLoop]: Abstraction has 30188 states and 45321 transitions. [2021-11-23 02:46:36,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30188 states and 45321 transitions. [2021-11-23 02:46:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 02:46:36,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:36,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:46:36,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:46:36,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash -788905108, now seen corresponding path program 1 times [2021-11-23 02:46:36,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:36,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387360857] [2021-11-23 02:46:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:36,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:46:36,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387360857] [2021-11-23 02:46:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387360857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:36,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:36,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:46:36,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051373007] [2021-11-23 02:46:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:36,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:46:36,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:46:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:46:36,481 INFO L87 Difference]: Start difference. First operand 30188 states and 45321 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:38,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:45,625 INFO L93 Difference]: Finished difference Result 47318 states and 70701 transitions. [2021-11-23 02:46:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:46:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 136 [2021-11-23 02:46:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:45,807 INFO L225 Difference]: With dead ends: 47318 [2021-11-23 02:46:45,807 INFO L226 Difference]: Without dead ends: 30284 [2021-11-23 02:46:45,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:46:45,916 INFO L933 BasicCegarLoop]: 3546 mSDtfsCounter, 3910 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3914 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:45,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3914 Valid, 10625 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1155 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 02:46:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30284 states. [2021-11-23 02:46:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30284 to 30212. [2021-11-23 02:46:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 19248 states have (on average 1.3488154613466334) internal successors, (25962), 19718 states have internal predecessors, (25962), 9396 states have call successors, (9396), 1568 states have call predecessors, (9396), 1567 states have return successors, (9975), 9239 states have call predecessors, (9975), 9395 states have call successors, (9975) [2021-11-23 02:46:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 45333 transitions. [2021-11-23 02:46:47,915 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 45333 transitions. Word has length 136 [2021-11-23 02:46:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:47,916 INFO L470 AbstractCegarLoop]: Abstraction has 30212 states and 45333 transitions. [2021-11-23 02:46:47,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 45333 transitions. [2021-11-23 02:46:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 02:46:47,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:47,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:46:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:46:47,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash -778811797, now seen corresponding path program 1 times [2021-11-23 02:46:47,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:47,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355278689] [2021-11-23 02:46:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:47,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:46:48,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355278689] [2021-11-23 02:46:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355278689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:48,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:48,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:46:48,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21212819] [2021-11-23 02:46:48,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:48,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:46:48,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:46:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:46:48,418 INFO L87 Difference]: Start difference. First operand 30212 states and 45333 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:46:50,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:54,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:00,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:03,144 INFO L93 Difference]: Finished difference Result 51734 states and 77315 transitions. [2021-11-23 02:47:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:47:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 133 [2021-11-23 02:47:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:03,334 INFO L225 Difference]: With dead ends: 51734 [2021-11-23 02:47:03,334 INFO L226 Difference]: Without dead ends: 30303 [2021-11-23 02:47:03,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:47:03,466 INFO L933 BasicCegarLoop]: 4404 mSDtfsCounter, 3911 mSDsluCounter, 13527 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3915 SdHoareTripleChecker+Valid, 16800 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:03,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3915 Valid, 16800 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1537 Invalid, 1 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 02:47:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30303 states. [2021-11-23 02:47:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30303 to 30228. [2021-11-23 02:47:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30228 states, 19264 states have (on average 1.3485257475083057) internal successors, (25978), 19730 states have internal predecessors, (25978), 9392 states have call successors, (9392), 1572 states have call predecessors, (9392), 1571 states have return successors, (9971), 9239 states have call predecessors, (9971), 9391 states have call successors, (9971) [2021-11-23 02:47:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30228 states to 30228 states and 45341 transitions. [2021-11-23 02:47:05,596 INFO L78 Accepts]: Start accepts. Automaton has 30228 states and 45341 transitions. Word has length 133 [2021-11-23 02:47:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:05,597 INFO L470 AbstractCegarLoop]: Abstraction has 30228 states and 45341 transitions. [2021-11-23 02:47:05,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:47:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 30228 states and 45341 transitions. [2021-11-23 02:47:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 02:47:05,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:05,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:47:05,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:47:05,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:05,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1054842708, now seen corresponding path program 1 times [2021-11-23 02:47:05,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:05,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19839052] [2021-11-23 02:47:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:05,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:47:05,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19839052] [2021-11-23 02:47:05,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19839052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:05,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:05,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:47:05,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545045355] [2021-11-23 02:47:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:05,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:47:05,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:47:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:47:05,880 INFO L87 Difference]: Start difference. First operand 30228 states and 45341 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:47:07,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:18,043 INFO L93 Difference]: Finished difference Result 51714 states and 77267 transitions. [2021-11-23 02:47:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:47:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 134 [2021-11-23 02:47:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:18,176 INFO L225 Difference]: With dead ends: 51714 [2021-11-23 02:47:18,176 INFO L226 Difference]: Without dead ends: 30263 [2021-11-23 02:47:18,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:47:18,257 INFO L933 BasicCegarLoop]: 4404 mSDtfsCounter, 3909 mSDsluCounter, 13527 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3913 SdHoareTripleChecker+Valid, 16800 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:18,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3913 Valid, 16800 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1537 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-23 02:47:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30263 states. [2021-11-23 02:47:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30263 to 30200. [2021-11-23 02:47:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 19244 states have (on average 1.3482643940968613) internal successors, (25946), 19706 states have internal predecessors, (25946), 9384 states have call successors, (9384), 1572 states have call predecessors, (9384), 1571 states have return successors, (9963), 9235 states have call predecessors, (9963), 9383 states have call successors, (9963) [2021-11-23 02:47:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 45293 transitions. [2021-11-23 02:47:20,038 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 45293 transitions. Word has length 134 [2021-11-23 02:47:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:20,039 INFO L470 AbstractCegarLoop]: Abstraction has 30200 states and 45293 transitions. [2021-11-23 02:47:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:47:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 45293 transitions. [2021-11-23 02:47:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 02:47:20,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:20,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:47:20,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:47:20,048 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1937482634, now seen corresponding path program 1 times [2021-11-23 02:47:20,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:20,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135141659] [2021-11-23 02:47:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:20,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:47:20,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:20,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135141659] [2021-11-23 02:47:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135141659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:20,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:47:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536017182] [2021-11-23 02:47:20,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:47:20,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:47:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:47:20,261 INFO L87 Difference]: Start difference. First operand 30200 states and 45293 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:47:22,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:30,542 INFO L93 Difference]: Finished difference Result 46963 states and 70110 transitions. [2021-11-23 02:47:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:47:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 137 [2021-11-23 02:47:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:30,727 INFO L225 Difference]: With dead ends: 46963 [2021-11-23 02:47:30,727 INFO L226 Difference]: Without dead ends: 29905 [2021-11-23 02:47:30,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:47:30,800 INFO L933 BasicCegarLoop]: 3546 mSDtfsCounter, 3908 mSDsluCounter, 7837 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3912 SdHoareTripleChecker+Valid, 10625 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:30,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3912 Valid, 10625 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1155 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 02:47:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29905 states. [2021-11-23 02:47:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29905 to 29851. [2021-11-23 02:47:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29851 states, 19017 states have (on average 1.3481095861597518) internal successors, (25637), 19469 states have internal predecessors, (25637), 9273 states have call successors, (9273), 1561 states have call predecessors, (9273), 1560 states have return successors, (9852), 9131 states have call predecessors, (9852), 9272 states have call successors, (9852) [2021-11-23 02:47:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29851 states to 29851 states and 44762 transitions. [2021-11-23 02:47:32,620 INFO L78 Accepts]: Start accepts. Automaton has 29851 states and 44762 transitions. Word has length 137 [2021-11-23 02:47:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 29851 states and 44762 transitions. [2021-11-23 02:47:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:47:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 29851 states and 44762 transitions. [2021-11-23 02:47:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:47:32,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:32,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:47:32,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:47:32,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash -574949944, now seen corresponding path program 1 times [2021-11-23 02:47:32,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:32,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982816392] [2021-11-23 02:47:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:32,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 02:47:33,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:33,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982816392] [2021-11-23 02:47:33,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982816392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:33,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120062158] [2021-11-23 02:47:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:33,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:33,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:33,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:47:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:47:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:47:34,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:47:34,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120062158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:34,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:47:34,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:47:34,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233506646] [2021-11-23 02:47:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:34,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:47:34,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:47:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:47:34,813 INFO L87 Difference]: Start difference. First operand 29851 states and 44762 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:47:36,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:42,386 WARN L534 Checker$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 02:48:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:04,874 INFO L93 Difference]: Finished difference Result 69922 states and 104921 transitions. [2021-11-23 02:48:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:48:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 144 [2021-11-23 02:48:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:05,146 INFO L225 Difference]: With dead ends: 69922 [2021-11-23 02:48:05,146 INFO L226 Difference]: Without dead ends: 49767 [2021-11-23 02:48:05,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:48:05,251 INFO L933 BasicCegarLoop]: 6771 mSDtfsCounter, 3917 mSDsluCounter, 33983 mSDsCounter, 0 mSdLazyCounter, 4095 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 37466 SdHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4095 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:05,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 37466 Invalid, 4098 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4095 Invalid, 2 Unknown, 0 Unchecked, 28.1s Time] [2021-11-23 02:48:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-11-23 02:48:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 49636. [2021-11-23 02:48:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49636 states, 31632 states have (on average 1.3485078401618613) internal successors, (42656), 32396 states have internal predecessors, (42656), 15406 states have call successors, (15406), 2590 states have call predecessors, (15406), 2597 states have return successors, (16585), 15161 states have call predecessors, (16585), 15405 states have call successors, (16585) [2021-11-23 02:48:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49636 states to 49636 states and 74647 transitions. [2021-11-23 02:48:08,464 INFO L78 Accepts]: Start accepts. Automaton has 49636 states and 74647 transitions. Word has length 144 [2021-11-23 02:48:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:08,465 INFO L470 AbstractCegarLoop]: Abstraction has 49636 states and 74647 transitions. [2021-11-23 02:48:08,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:48:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 49636 states and 74647 transitions. [2021-11-23 02:48:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 02:48:08,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:08,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:48:08,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:48:08,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:48:08,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1082106170, now seen corresponding path program 1 times [2021-11-23 02:48:08,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:08,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600173817] [2021-11-23 02:48:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:08,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:48:09,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:09,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600173817] [2021-11-23 02:48:09,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600173817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:48:09,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541997131] [2021-11-23 02:48:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:09,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:09,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:09,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:09,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:48:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:48:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:48:10,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:48:10,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541997131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:10,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:48:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:48:10,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417344043] [2021-11-23 02:48:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:10,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:48:10,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:48:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:48:10,914 INFO L87 Difference]: Start difference. First operand 49636 states and 74647 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:48:12,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:21,428 WARN L534 Checker$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 02:48:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:40,739 INFO L93 Difference]: Finished difference Result 109536 states and 164731 transitions. [2021-11-23 02:48:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:48:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2021-11-23 02:48:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:41,092 INFO L225 Difference]: With dead ends: 109536 [2021-11-23 02:48:41,093 INFO L226 Difference]: Without dead ends: 69596 [2021-11-23 02:48:41,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:48:41,442 INFO L933 BasicCegarLoop]: 6887 mSDtfsCounter, 3917 mSDsluCounter, 34396 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 38034 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:41,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 38034 Invalid, 4050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4047 Invalid, 2 Unknown, 0 Unchecked, 26.9s Time] [2021-11-23 02:48:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69596 states. [2021-11-23 02:48:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69596 to 69441. [2021-11-23 02:48:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69441 states, 44259 states have (on average 1.3485844686956325) internal successors, (59687), 45347 states have internal predecessors, (59687), 21539 states have call successors, (21539), 3619 states have call predecessors, (21539), 3642 states have return successors, (23330), 21187 states have call predecessors, (23330), 21538 states have call successors, (23330) [2021-11-23 02:48:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69441 states to 69441 states and 104556 transitions. [2021-11-23 02:48:46,005 INFO L78 Accepts]: Start accepts. Automaton has 69441 states and 104556 transitions. Word has length 145 [2021-11-23 02:48:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:46,005 INFO L470 AbstractCegarLoop]: Abstraction has 69441 states and 104556 transitions. [2021-11-23 02:48:46,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:48:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 69441 states and 104556 transitions. [2021-11-23 02:48:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:48:46,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:46,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:48:46,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:46,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:46,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2117425631, now seen corresponding path program 1 times [2021-11-23 02:48:46,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:46,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293222809] [2021-11-23 02:48:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:46,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:48:46,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293222809] [2021-11-23 02:48:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293222809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:48:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147729417] [2021-11-23 02:48:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:46,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:46,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:46,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:48:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2649 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:48:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:48:48,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:48:48,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147729417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:48,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:48:48,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:48:48,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819477810] [2021-11-23 02:48:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:48,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:48:48,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:48:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:48:48,160 INFO L87 Difference]: Start difference. First operand 69441 states and 104556 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:48:50,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:16,337 INFO L93 Difference]: Finished difference Result 149138 states and 224533 transitions. [2021-11-23 02:49:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:49:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 146 [2021-11-23 02:49:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:16,933 INFO L225 Difference]: With dead ends: 149138 [2021-11-23 02:49:16,934 INFO L226 Difference]: Without dead ends: 89393 [2021-11-23 02:49:17,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:49:17,242 INFO L933 BasicCegarLoop]: 7065 mSDtfsCounter, 3917 mSDsluCounter, 35252 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 38924 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:17,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 38924 Invalid, 4231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4229 Invalid, 1 Unknown, 0 Unchecked, 24.4s Time] [2021-11-23 02:49:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89393 states. [2021-11-23 02:49:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89393 to 69445. [2021-11-23 02:49:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69445 states, 44263 states have (on average 1.348552967489777) internal successors, (59691), 45347 states have internal predecessors, (59691), 21539 states have call successors, (21539), 3619 states have call predecessors, (21539), 3642 states have return successors, (23330), 21191 states have call predecessors, (23330), 21538 states have call successors, (23330) [2021-11-23 02:49:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69445 states to 69445 states and 104560 transitions. [2021-11-23 02:49:22,683 INFO L78 Accepts]: Start accepts. Automaton has 69445 states and 104560 transitions. Word has length 146 [2021-11-23 02:49:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:22,684 INFO L470 AbstractCegarLoop]: Abstraction has 69445 states and 104560 transitions. [2021-11-23 02:49:22,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:49:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 69445 states and 104560 transitions. [2021-11-23 02:49:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:49:23,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:23,005 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:49:23,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:23,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:49:23,205 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1252360141, now seen corresponding path program 1 times [2021-11-23 02:49:23,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:23,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200128527] [2021-11-23 02:49:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:23,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:49:23,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200128527] [2021-11-23 02:49:23,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200128527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668046595] [2021-11-23 02:49:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:23,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:23,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:23,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:49:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:49:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:49:24,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:49:24,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668046595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:24,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:49:24,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:49:24,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606317904] [2021-11-23 02:49:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:24,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:49:24,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:49:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:49:24,958 INFO L87 Difference]: Start difference. First operand 69445 states and 104560 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:49:26,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:53,310 INFO L93 Difference]: Finished difference Result 149150 states and 224545 transitions. [2021-11-23 02:49:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:49:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-11-23 02:49:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:53,964 INFO L225 Difference]: With dead ends: 149150 [2021-11-23 02:49:53,964 INFO L226 Difference]: Without dead ends: 89401 [2021-11-23 02:49:54,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:49:54,217 INFO L933 BasicCegarLoop]: 7065 mSDtfsCounter, 3917 mSDsluCounter, 35252 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3921 SdHoareTripleChecker+Valid, 38924 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:54,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3921 Valid, 38924 Invalid, 4231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4229 Invalid, 1 Unknown, 0 Unchecked, 24.9s Time] [2021-11-23 02:49:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-11-23 02:49:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 69449. [2021-11-23 02:49:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69449 states, 44267 states have (on average 1.3485214719768677) internal successors, (59695), 45347 states have internal predecessors, (59695), 21539 states have call successors, (21539), 3619 states have call predecessors, (21539), 3642 states have return successors, (23330), 21195 states have call predecessors, (23330), 21538 states have call successors, (23330) [2021-11-23 02:49:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69449 states to 69449 states and 104564 transitions. [2021-11-23 02:49:59,140 INFO L78 Accepts]: Start accepts. Automaton has 69449 states and 104564 transitions. Word has length 147 [2021-11-23 02:49:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:59,140 INFO L470 AbstractCegarLoop]: Abstraction has 69449 states and 104564 transitions. [2021-11-23 02:49:59,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:49:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 69449 states and 104564 transitions. [2021-11-23 02:49:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 02:49:59,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:59,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:49:59,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:49:59,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:49:59,369 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 432492216, now seen corresponding path program 1 times [2021-11-23 02:49:59,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264661545] [2021-11-23 02:49:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:59,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-23 02:49:59,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264661545] [2021-11-23 02:49:59,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264661545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721522029] [2021-11-23 02:49:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:59,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:59,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:59,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:50:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:50:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:50:01,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:01,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721522029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:01,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:01,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:50:01,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637455005] [2021-11-23 02:50:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:50:01,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:50:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:50:01,235 INFO L87 Difference]: Start difference. First operand 69449 states and 104564 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:50:03,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:06,305 WARN L534 Checker$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 02:50:09,101 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 02:50:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:34,374 INFO L93 Difference]: Finished difference Result 139304 states and 209583 transitions. [2021-11-23 02:50:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:50:34,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 150 [2021-11-23 02:50:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:35,142 INFO L225 Difference]: With dead ends: 139304 [2021-11-23 02:50:35,142 INFO L226 Difference]: Without dead ends: 103930 [2021-11-23 02:50:35,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:50:35,343 INFO L933 BasicCegarLoop]: 7055 mSDtfsCounter, 3903 mSDsluCounter, 35150 mSDsCounter, 0 mSdLazyCounter, 4218 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3907 SdHoareTripleChecker+Valid, 38802 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4218 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:35,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3907 Valid, 38802 Invalid, 4220 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 4218 Invalid, 2 Unknown, 0 Unchecked, 29.6s Time] [2021-11-23 02:50:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103930 states. [2021-11-23 02:50:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103930 to 103619. [2021-11-23 02:50:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103619 states, 66051 states have (on average 1.3490181829192593) internal successors, (89104), 67672 states have internal predecessors, (89104), 32128 states have call successors, (32128), 5390 states have call predecessors, (32128), 5439 states have return successors, (34829), 31621 states have call predecessors, (34829), 32127 states have call successors, (34829) [2021-11-23 02:50:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103619 states to 103619 states and 156061 transitions. [2021-11-23 02:50:41,582 INFO L78 Accepts]: Start accepts. Automaton has 103619 states and 156061 transitions. Word has length 150 [2021-11-23 02:50:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 103619 states and 156061 transitions. [2021-11-23 02:50:41,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:50:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 103619 states and 156061 transitions. [2021-11-23 02:50:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 02:50:41,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:41,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 02:50:41,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:50:41,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:50:41,809 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1467833467, now seen corresponding path program 1 times [2021-11-23 02:50:41,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:41,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62978724] [2021-11-23 02:50:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:41,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:50:42,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62978724] [2021-11-23 02:50:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62978724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140399225] [2021-11-23 02:50:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:42,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:42,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:42,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:42,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1e5db1-f17a-4dec-a928-1fde96589da9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:50:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:50:43,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:50:43,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:43,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140399225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:43,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:43,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:50:43,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794490646] [2021-11-23 02:50:43,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:43,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:50:43,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:50:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:50:43,811 INFO L87 Difference]: Start difference. First operand 103619 states and 156061 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:50:45,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:00,949 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 []