./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 70a2ace6fc40caa55e586c636402c0a5dfab1c8b77b7cf0fdf6a2120173a773c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:47,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:47,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:47,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:47,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:47,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:47,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:47,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:47,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:47,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:47,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:47,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:47,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:47,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:47,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:47,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:47,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:47,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:47,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:47,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:47,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:47,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:47,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:47,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:47,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:47,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:47,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:47,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:47,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:47,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:47,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:47,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:47,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:47,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:47,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:47,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:47,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:47,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:47,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:47,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:47,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:47,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:32:47,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:47,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:47,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:47,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:47,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:47,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:47,758 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:47,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:47,759 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:47,759 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:47,760 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:47,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:47,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:47,761 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:47,761 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:47,762 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:47,762 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:47,762 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:47,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:47,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:47,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:47,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:32:47,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:47,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:32:47,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:32:47,765 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:47,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:32:47,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:47,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:47,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:47,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:47,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:47,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:32:47,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:47,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:47,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:32:47,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:47,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:47,768 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_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70a2ace6fc40caa55e586c636402c0a5dfab1c8b77b7cf0fdf6a2120173a773c [2021-11-20 23:32:48,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:48,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:48,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:48,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:48,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:48,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i [2021-11-20 23:32:48,122 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/data/eed19ba1d/3ac2c2e00aa643ebb67719440c2dac10/FLAG1bbf5bdd5 [2021-11-20 23:32:48,856 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:48,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i [2021-11-20 23:32:48,901 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/data/eed19ba1d/3ac2c2e00aa643ebb67719440c2dac10/FLAG1bbf5bdd5 [2021-11-20 23:32:48,931 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/data/eed19ba1d/3ac2c2e00aa643ebb67719440c2dac10 [2021-11-20 23:32:48,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:48,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:48,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:48,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:48,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:48,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:48" (1/1) ... [2021-11-20 23:32:48,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2bf868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:48, skipping insertion in model container [2021-11-20 23:32:48,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:48" (1/1) ... [2021-11-20 23:32:48,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:49,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:50,541 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_2a645a7b-b965-4876-9553-369fb075055a/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i[199632,199645] [2021-11-20 23:32:50,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:50,668 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:50,956 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_2a645a7b-b965-4876-9553-369fb075055a/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i[199632,199645] [2021-11-20 23:32:50,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:51,313 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:51,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51 WrapperNode [2021-11-20 23:32:51,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:51,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:51,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:51,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:51,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,503 INFO L137 Inliner]: procedures = 142, calls = 839, calls flagged for inlining = 59, calls inlined = 40, statements flattened = 1657 [2021-11-20 23:32:51,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:51,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:51,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:51,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:51,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:51,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:51,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:51,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:51,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (1/1) ... [2021-11-20 23:32:51,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:51,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:51,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:51,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 23:32:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 23:32:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure catc_tx_run [2021-11-20 23:32:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_tx_run [2021-11-20 23:32:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:32:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-20 23:32:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-20 23:32:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:32:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:32:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:32:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:32:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:32:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:32:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:32:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure catc_ctrl_run [2021-11-20 23:32:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_ctrl_run [2021-11-20 23:32:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure catc_get_drvinfo [2021-11-20 23:32:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_get_drvinfo [2021-11-20 23:32:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure catc_ctrl_msg [2021-11-20 23:32:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_ctrl_msg [2021-11-20 23:32:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:32:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:32:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-20 23:32:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-20 23:32:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:32:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:32:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure catc_multicast [2021-11-20 23:32:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_multicast [2021-11-20 23:32:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-20 23:32:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-20 23:32:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:32:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-20 23:32:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-20 23:32:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2021-11-20 23:32:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2021-11-20 23:32:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-20 23:32:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-20 23:32:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:32:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:32:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:32:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:32:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:32:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:32:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:32:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-11-20 23:32:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-11-20 23:32:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:32:51,754 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:32:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 23:32:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 23:32:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:32:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:32:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure catc_ctrl_async [2021-11-20 23:32:51,758 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_ctrl_async [2021-11-20 23:32:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:32:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure catc_exit [2021-11-20 23:32:51,759 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_exit [2021-11-20 23:32:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-20 23:32:51,759 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-20 23:32:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-20 23:32:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-20 23:32:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 23:32:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 23:32:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure catc_init [2021-11-20 23:32:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_init [2021-11-20 23:32:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-20 23:32:51,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-20 23:32:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:32:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:32:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-20 23:32:51,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-20 23:32:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-20 23:32:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-20 23:32:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:32:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:32:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-20 23:32:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-20 23:32:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:32:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:32:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2021-11-20 23:32:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2021-11-20 23:32:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:32:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-20 23:32:51,764 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-20 23:32:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:32:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-20 23:32:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:51,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:52,213 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:52,215 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:53,016 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2021-11-20 23:32:53,079 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:32:53,120 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:32:54,290 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##191: assume false; [2021-11-20 23:32:54,291 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##192: assume !false; [2021-11-20 23:32:54,291 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2021-11-20 23:32:54,291 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2021-11-20 23:32:54,331 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:32:54,718 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:32:54,718 INFO L301 CfgBuilder]: Removed 30 assume(true) statements. [2021-11-20 23:32:54,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:54 BoogieIcfgContainer [2021-11-20 23:32:54,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:32:54,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:32:54,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:32:54,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:32:54,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:48" (1/3) ... [2021-11-20 23:32:54,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cabaddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:54, skipping insertion in model container [2021-11-20 23:32:54,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:51" (2/3) ... [2021-11-20 23:32:54,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cabaddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:54, skipping insertion in model container [2021-11-20 23:32:54,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:54" (3/3) ... [2021-11-20 23:32:54,735 INFO L111 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-net-usb-catc.ko.cil.out.i [2021-11-20 23:32:54,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:32:54,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:32:54,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:32:54,826 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 [2021-11-20 23:32:54,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:32:54,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 245 states have (on average 1.3142857142857143) internal successors, (322), 258 states have internal predecessors, (322), 122 states have call successors, (122), 36 states have call predecessors, (122), 35 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2021-11-20 23:32:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:32:54,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:54,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:54,881 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1823962436, now seen corresponding path program 1 times [2021-11-20 23:32:54,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:54,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088398786] [2021-11-20 23:32:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:54,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:32:55,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088398786] [2021-11-20 23:32:55,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088398786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:55,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:55,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:32:55,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654750190] [2021-11-20 23:32:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:55,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:32:55,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:32:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:32:55,481 INFO L87 Difference]: Start difference. First operand has 404 states, 245 states have (on average 1.3142857142857143) internal successors, (322), 258 states have internal predecessors, (322), 122 states have call successors, (122), 36 states have call predecessors, (122), 35 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:32:56,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:32:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:59,071 INFO L93 Difference]: Finished difference Result 1079 states and 1538 transitions. [2021-11-20 23:32:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:32:59,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-20 23:32:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:59,094 INFO L225 Difference]: With dead ends: 1079 [2021-11-20 23:32:59,094 INFO L226 Difference]: Without dead ends: 675 [2021-11-20 23:32:59,101 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 [2021-11-20 23:32:59,105 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 371 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:59,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 995 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 23:32:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-20 23:32:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 671. [2021-11-20 23:32:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 412 states have (on average 1.2548543689320388) internal successors, (517), 426 states have internal predecessors, (517), 194 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (191), 187 states have call predecessors, (191), 191 states have call successors, (191) [2021-11-20 23:32:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 902 transitions. [2021-11-20 23:32:59,237 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 902 transitions. Word has length 10 [2021-11-20 23:32:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:59,239 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 902 transitions. [2021-11-20 23:32:59,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:32:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 902 transitions. [2021-11-20 23:32:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:32:59,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:59,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:59,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:32:59,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash 708001173, now seen corresponding path program 1 times [2021-11-20 23:32:59,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:59,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389046124] [2021-11-20 23:32:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:59,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:32:59,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389046124] [2021-11-20 23:32:59,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389046124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:59,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:59,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:32:59,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805308970] [2021-11-20 23:32:59,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:59,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:32:59,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:32:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:32:59,444 INFO L87 Difference]: Start difference. First operand 671 states and 902 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:33:01,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:01,568 INFO L93 Difference]: Finished difference Result 673 states and 903 transitions. [2021-11-20 23:33:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 23:33:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:01,576 INFO L225 Difference]: With dead ends: 673 [2021-11-20 23:33:01,576 INFO L226 Difference]: Without dead ends: 664 [2021-11-20 23:33:01,577 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 [2021-11-20 23:33:01,579 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 533 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:01,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 462 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 23:33:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-20 23:33:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-11-20 23:33:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 408 states have (on average 1.2426470588235294) internal successors, (507), 420 states have internal predecessors, (507), 192 states have call successors, (192), 65 states have call predecessors, (192), 63 states have return successors, (190), 186 states have call predecessors, (190), 190 states have call successors, (190) [2021-11-20 23:33:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 889 transitions. [2021-11-20 23:33:01,674 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 889 transitions. Word has length 11 [2021-11-20 23:33:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:01,675 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 889 transitions. [2021-11-20 23:33:01,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:33:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 889 transitions. [2021-11-20 23:33:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:33:01,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:01,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:01,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:33:01,679 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1131503975, now seen corresponding path program 1 times [2021-11-20 23:33:01,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:01,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008075282] [2021-11-20 23:33:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:01,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:01,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:01,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008075282] [2021-11-20 23:33:01,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008075282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:01,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:01,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:33:01,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873415610] [2021-11-20 23:33:01,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:01,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:33:01,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:33:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:33:01,811 INFO L87 Difference]: Start difference. First operand 664 states and 889 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:33:04,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:05,620 INFO L93 Difference]: Finished difference Result 1574 states and 2170 transitions. [2021-11-20 23:33:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-20 23:33:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:05,630 INFO L225 Difference]: With dead ends: 1574 [2021-11-20 23:33:05,630 INFO L226 Difference]: Without dead ends: 915 [2021-11-20 23:33:05,633 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 [2021-11-20 23:33:05,634 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 185 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:05,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 879 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 23:33:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-20 23:33:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 911. [2021-11-20 23:33:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 573 states have (on average 1.2722513089005236) internal successors, (729), 593 states have internal predecessors, (729), 274 states have call successors, (274), 65 states have call predecessors, (274), 63 states have return successors, (272), 266 states have call predecessors, (272), 272 states have call successors, (272) [2021-11-20 23:33:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1275 transitions. [2021-11-20 23:33:05,715 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1275 transitions. Word has length 35 [2021-11-20 23:33:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:05,715 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1275 transitions. [2021-11-20 23:33:05,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:33:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1275 transitions. [2021-11-20 23:33:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:33:05,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:05,721 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:33:05,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:33:05,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 924748555, now seen corresponding path program 1 times [2021-11-20 23:33:05,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:05,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884678708] [2021-11-20 23:33:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:05,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:05,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:05,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884678708] [2021-11-20 23:33:05,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884678708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:05,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:05,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:33:05,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543052837] [2021-11-20 23:33:05,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:05,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:05,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:05,838 INFO L87 Difference]: Start difference. First operand 911 states and 1275 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:33:07,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:08,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:11,606 INFO L93 Difference]: Finished difference Result 1681 states and 2331 transitions. [2021-11-20 23:33:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2021-11-20 23:33:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:11,616 INFO L225 Difference]: With dead ends: 1681 [2021-11-20 23:33:11,616 INFO L226 Difference]: Without dead ends: 771 [2021-11-20 23:33:11,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:11,631 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 11 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:11,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1371 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:33:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-20 23:33:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 763. [2021-11-20 23:33:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 475 states have (on average 1.256842105263158) internal successors, (597), 491 states have internal predecessors, (597), 226 states have call successors, (226), 63 states have call predecessors, (226), 61 states have return successors, (224), 219 states have call predecessors, (224), 224 states have call successors, (224) [2021-11-20 23:33:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1047 transitions. [2021-11-20 23:33:11,699 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1047 transitions. Word has length 53 [2021-11-20 23:33:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:11,700 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1047 transitions. [2021-11-20 23:33:11,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:33:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1047 transitions. [2021-11-20 23:33:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 23:33:11,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:11,707 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:11,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:33:11,707 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1617761461, now seen corresponding path program 1 times [2021-11-20 23:33:11,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829172962] [2021-11-20 23:33:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:11,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 23:33:12,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:12,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829172962] [2021-11-20 23:33:12,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829172962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:12,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:12,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:33:12,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525928135] [2021-11-20 23:33:12,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:33:12,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:12,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:33:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:12,058 INFO L87 Difference]: Start difference. First operand 763 states and 1047 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 23:33:13,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:14,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:17,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:18,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:24,538 INFO L93 Difference]: Finished difference Result 803 states and 1102 transitions. [2021-11-20 23:33:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:33:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2021-11-20 23:33:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:24,547 INFO L225 Difference]: With dead ends: 803 [2021-11-20 23:33:24,548 INFO L226 Difference]: Without dead ends: 765 [2021-11-20 23:33:24,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:33:24,549 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 4 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:24,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2624 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 594 Invalid, 1 Unknown, 0 Unchecked, 12.4s Time] [2021-11-20 23:33:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-11-20 23:33:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 763. [2021-11-20 23:33:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 475 states have (on average 1.2547368421052632) internal successors, (596), 491 states have internal predecessors, (596), 226 states have call successors, (226), 63 states have call predecessors, (226), 61 states have return successors, (224), 219 states have call predecessors, (224), 224 states have call successors, (224) [2021-11-20 23:33:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1046 transitions. [2021-11-20 23:33:24,608 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1046 transitions. Word has length 109 [2021-11-20 23:33:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:24,609 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1046 transitions. [2021-11-20 23:33:24,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 23:33:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1046 transitions. [2021-11-20 23:33:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 23:33:24,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:24,612 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:24,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:33:24,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash 855384837, now seen corresponding path program 1 times [2021-11-20 23:33:24,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:24,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257988894] [2021-11-20 23:33:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:24,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 23:33:25,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257988894] [2021-11-20 23:33:25,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257988894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238081991] [2021-11-20 23:33:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:25,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:25,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:25,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a645a7b-b965-4876-9553-369fb075055a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:33:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-20 23:33:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:26,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-20 23:33:26,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-20 23:33:26,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-20 23:33:27,353 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:33:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2021-11-20 23:33:27,367 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:33:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2021-11-20 23:33:27,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-20 23:33:28,346 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:33:28,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2021-11-20 23:33:28,358 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:33:28,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 103 [2021-11-20 23:33:29,960 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-20 23:33:29,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 180 [2021-11-20 23:33:29,987 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-20 23:33:29,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 209 [2021-11-20 23:33:30,946 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-20 23:33:30,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 260 treesize of output 170 [2021-11-20 23:33:30,954 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-20 23:33:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 110 [2021-11-20 23:33:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:33:31,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:32,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238081991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488665942] [2021-11-20 23:33:32,280 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2021-11-20 23:33:32,281 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:33:32,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:33:32,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:33:32,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:33:36,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 121 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 61 [2021-11-20 23:33:37,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1774 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 266 [2021-11-20 23:33:41,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1055 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 201 [2021-11-20 23:38:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:20,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:20,158 INFO L244 Elim1Store]: Index analysis took 172 ms [2021-11-20 23:38:21,659 INFO L354 Elim1Store]: treesize reduction 723, result has 34.6 percent of original size [2021-11-20 23:38:21,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 32 select indices, 32 select index equivalence classes, 499 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 32 case distinctions, treesize of input 170 treesize of output 488 [2021-11-20 23:38:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:30,720 INFO L244 Elim1Store]: Index analysis took 167 ms [2021-11-20 23:38:33,302 INFO L354 Elim1Store]: treesize reduction 1200, result has 25.4 percent of original size [2021-11-20 23:38:33,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 35 select indices, 35 select index equivalence classes, 532 disjoint index pairs (out of 595 index pairs), introduced 35 new quantified variables, introduced 96 case distinctions, treesize of input 189 treesize of output 533 [2021-11-20 23:38:39,791 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2021-11-20 23:38:39,817 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2021-11-20 23:38:40,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:38:40,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:38:47,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:47,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:47,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:47,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:47,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:47,297 INFO L354 Elim1Store]: treesize reduction 133, result has 27.7 percent of original size [2021-11-20 23:38:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 67 [2021-11-20 23:38:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,523 INFO L354 Elim1Store]: treesize reduction 123, result has 33.2 percent of original size [2021-11-20 23:38:48,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 77 [2021-11-20 23:38:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:48,965 INFO L354 Elim1Store]: treesize reduction 135, result has 31.1 percent of original size [2021-11-20 23:38:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 70 [2021-11-20 23:38:49,073 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 23:38:49,093 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 23:39:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:39:13,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:39:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:39:13,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2021-11-20 23:39:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:39:14,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:39:18,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:39:18,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:39:19,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 23:39:24,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:39:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:39:24,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 81 [2021-11-20 23:39:24,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 95 [2021-11-20 23:39:26,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:39:26,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:39:29,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:39:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:39:30,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:39:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 23:39:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:39:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:39:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:39:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 69 [2021-11-20 23:39:35,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2021-11-20 23:39:48,465 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 23:39:49,053 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2021-11-20 23:40:03,765 INFO L197 IcfgInterpreter]: Interpreting procedure usb_free_urb with input of size 138 for LOIs [2021-11-20 23:40:14,597 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_blast_assert with input of size 132 for LOIs [2021-11-20 23:40:16,328 INFO L197 IcfgInterpreter]: Interpreting procedure spinlock_check with input of size 91 for LOIs [2021-11-20 23:40:16,986 INFO L197 IcfgInterpreter]: Interpreting procedure __raw_spin_lock_init with input of size 127 for LOIs [2021-11-20 23:40:18,607 INFO L197 IcfgInterpreter]: Interpreting procedure catc_init with input of size 1466 for LOIs [2021-11-20 23:40:35,574 INFO L197 IcfgInterpreter]: Interpreting procedure usb_alloc_urb with input of size 138 for LOIs [2021-11-20 23:40:38,931 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undefined_pointer with input of size 88 for LOIs [2021-11-20 23:40:41,558 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 105 for LOIs [2021-11-20 23:40:44,447 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_priv with input of size 99 for LOIs [2021-11-20 23:40:44,954 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:41:02,614 WARN L227 SmtUtils]: Spent 12.35s on a formula simplification that was a NOOP. DAG size: 1466 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:41:17,054 WARN L227 SmtUtils]: Spent 13.31s on a formula simplification that was a NOOP. DAG size: 1516 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:41:30,688 WARN L227 SmtUtils]: Spent 12.46s on a formula simplification that was a NOOP. DAG size: 1472 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:41:44,331 WARN L227 SmtUtils]: Spent 12.46s on a formula simplification that was a NOOP. DAG size: 1472 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:41:58,033 WARN L227 SmtUtils]: Spent 12.51s on a formula simplification that was a NOOP. DAG size: 1472 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:42:11,836 WARN L227 SmtUtils]: Spent 12.59s on a formula simplification that was a NOOP. DAG size: 1478 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:42:25,771 WARN L227 SmtUtils]: Spent 12.66s on a formula simplification that was a NOOP. DAG size: 1480 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:42:39,797 WARN L227 SmtUtils]: Spent 12.72s on a formula simplification that was a NOOP. DAG size: 1484 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:42:53,951 WARN L227 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 1486 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:43:08,311 WARN L227 SmtUtils]: Spent 12.84s on a formula simplification that was a NOOP. DAG size: 1488 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:43:22,685 WARN L227 SmtUtils]: Spent 12.89s on a formula simplification that was a NOOP. DAG size: 1490 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:43:37,460 WARN L227 SmtUtils]: Spent 12.95s on a formula simplification that was a NOOP. DAG size: 1492 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:43:51,969 WARN L227 SmtUtils]: Spent 13.00s on a formula simplification that was a NOOP. DAG size: 1494 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:44:06,558 WARN L227 SmtUtils]: Spent 13.05s on a formula simplification that was a NOOP. DAG size: 1496 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:44:21,318 WARN L227 SmtUtils]: Spent 13.10s on a formula simplification that was a NOOP. DAG size: 1498 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:44:35,681 WARN L227 SmtUtils]: Spent 12.72s on a formula simplification that was a NOOP. DAG size: 1482 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)