./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9e49a1360829f26f8d048b65d36d4ec5c4a8326faf8d0f409c04195556886603 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:03:10,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:03:10,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:03:10,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:03:10,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:03:10,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:03:10,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:03:10,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:03:10,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:03:10,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:03:10,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:03:10,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:03:10,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:03:10,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:03:10,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:03:10,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:03:10,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:03:10,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:03:10,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:03:10,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:03:10,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:03:10,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:03:10,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:03:10,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:03:10,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:03:10,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:03:10,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:03:10,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:03:10,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:03:10,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:03:10,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:03:10,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:03:10,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:03:10,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:03:10,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:03:10,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:03:10,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:03:10,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:03:10,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:03:10,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:03:10,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:03:10,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:03:10,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:03:10,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:03:10,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:03:10,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:03:10,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:03:10,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:03:10,224 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:03:10,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:03:10,224 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:03:10,224 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:03:10,225 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:03:10,226 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:03:10,226 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:03:10,226 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:03:10,226 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:03:10,227 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:03:10,227 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:03:10,227 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:03:10,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:03:10,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:03:10,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:03:10,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:03:10,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:03:10,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:03:10,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:03:10,230 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:03:10,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:03:10,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:03:10,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:03:10,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:03:10,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:03:10,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:03:10,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:03:10,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:03:10,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:03:10,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:03:10,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:03:10,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:03:10,234 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_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e49a1360829f26f8d048b65d36d4ec5c4a8326faf8d0f409c04195556886603 [2021-11-23 02:03:10,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:03:10,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:03:10,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:03:10,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:03:10,493 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:03:10,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i [2021-11-23 02:03:10,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/data/44f4919b5/5a74d2d177c5496f87799c7bc0932eca/FLAG6216363e3 [2021-11-23 02:03:11,367 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:03:11,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i [2021-11-23 02:03:11,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/data/44f4919b5/5a74d2d177c5496f87799c7bc0932eca/FLAG6216363e3 [2021-11-23 02:03:11,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/data/44f4919b5/5a74d2d177c5496f87799c7bc0932eca [2021-11-23 02:03:11,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:03:11,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:03:11,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:03:11,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:03:11,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:03:11,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:03:11" (1/1) ... [2021-11-23 02:03:11,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5de7b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:11, skipping insertion in model container [2021-11-23 02:03:11,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:03:11" (1/1) ... [2021-11-23 02:03:11,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:03:12,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:03:13,640 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_491afe78-b944-4a6b-81e1-a36ab436c3bf/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i[215646,215659] [2021-11-23 02:03:13,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:03:13,738 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:03:14,083 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_491afe78-b944-4a6b-81e1-a36ab436c3bf/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i[215646,215659] [2021-11-23 02:03:14,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:03:14,199 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:03:14,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14 WrapperNode [2021-11-23 02:03:14,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:03:14,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:03:14,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:03:14,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:03:14,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,437 INFO L137 Inliner]: procedures = 180, calls = 1491, calls flagged for inlining = 71, calls inlined = 66, statements flattened = 3754 [2021-11-23 02:03:14,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:03:14,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:03:14,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:03:14,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:03:14,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:03:14,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:03:14,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:03:14,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:03:14,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (1/1) ... [2021-11-23 02:03:14,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:03:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:14,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:03:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:03:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:03:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:03:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure digi_disconnect [2021-11-23 02:03:14,827 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_disconnect [2021-11-23 02:03:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:03:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure digi_break_ctl [2021-11-23 02:03:14,828 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_break_ctl [2021-11-23 02:03:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:03:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:03:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure cond_wait_interruptible_timeout_irqrestore [2021-11-23 02:03:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure cond_wait_interruptible_timeout_irqrestore [2021-11-23 02:03:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:03:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:03:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:03:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:03:14,830 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:03:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure digi_rx_throttle [2021-11-23 02:03:14,830 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_rx_throttle [2021-11-23 02:03:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_wakeup [2021-11-23 02:03:14,830 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_wakeup [2021-11-23 02:03:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:03:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:03:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:03:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:03:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 02:03:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 02:03:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure digi_startup [2021-11-23 02:03:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_startup [2021-11-23 02:03:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:03:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:03:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2021-11-23 02:03:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2021-11-23 02:03:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure digi_open [2021-11-23 02:03:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_open [2021-11-23 02:03:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:03:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:03:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:03:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:03:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 02:03:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 02:03:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:03:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:03:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-11-23 02:03:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-11-23 02:03:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure digi_read_bulk_callback [2021-11-23 02:03:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_read_bulk_callback [2021-11-23 02:03:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:03:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:03:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:03:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_bulk_callback [2021-11-23 02:03:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_bulk_callback [2021-11-23 02:03:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:03:14,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:03:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write [2021-11-23 02:03:14,840 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write [2021-11-23 02:03:14,840 INFO L130 BoogieDeclarations]: Found specification of procedure digi_set_termios [2021-11-23 02:03:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_set_termios [2021-11-23 02:03:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure digi_wakeup_write_lock [2021-11-23 02:03:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_wakeup_write_lock [2021-11-23 02:03:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_room [2021-11-23 02:03:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_room [2021-11-23 02:03:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:03:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:03:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:03:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:03:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure digi_close [2021-11-23 02:03:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_close [2021-11-23 02:03:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure digi_tiocmset [2021-11-23 02:03:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_tiocmset [2021-11-23 02:03:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure digi_tiocmget [2021-11-23 02:03:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_tiocmget [2021-11-23 02:03:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:03:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:03:14,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:03:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:03:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:03:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure digi_set_modem_signals [2021-11-23 02:03:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_set_modem_signals [2021-11-23 02:03:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure tty_termios_baud_rate [2021-11-23 02:03:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_termios_baud_rate [2021-11-23 02:03:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:03:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure digi_port_probe [2021-11-23 02:03:14,846 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_port_probe [2021-11-23 02:03:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:03:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:03:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure digi_release [2021-11-23 02:03:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_release [2021-11-23 02:03:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:03:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_inb_command [2021-11-23 02:03:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_inb_command [2021-11-23 02:03:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure digi_write_oob_command [2021-11-23 02:03:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_write_oob_command [2021-11-23 02:03:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:03:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:03:14,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:03:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure digi_port_init [2021-11-23 02:03:14,850 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_port_init [2021-11-23 02:03:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 02:03:14,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 02:03:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 02:03:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 02:03:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:03:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:03:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:03:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure digi_rx_unthrottle [2021-11-23 02:03:14,852 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_rx_unthrottle [2021-11-23 02:03:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:03:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-23 02:03:14,852 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-23 02:03:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure digi_dtr_rts [2021-11-23 02:03:14,853 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_dtr_rts [2021-11-23 02:03:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure digi_chars_in_buffer [2021-11-23 02:03:14,857 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_chars_in_buffer [2021-11-23 02:03:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:03:14,857 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:03:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 02:03:14,858 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 02:03:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:03:14,859 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:03:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:03:14,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:03:14,865 INFO L130 BoogieDeclarations]: Found specification of procedure digi_port_remove [2021-11-23 02:03:14,865 INFO L138 BoogieDeclarations]: Found implementation of procedure digi_port_remove [2021-11-23 02:03:14,865 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:03:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:03:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2021-11-23 02:03:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2021-11-23 02:03:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:03:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2021-11-23 02:03:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2021-11-23 02:03:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-11-23 02:03:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-11-23 02:03:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:03:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:03:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:03:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:03:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:03:15,433 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:03:15,436 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:03:15,820 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:03:26,999 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:03:27,881 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:03:27,881 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:03:27,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:03:27 BoogieIcfgContainer [2021-11-23 02:03:27,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:03:27,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:03:27,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:03:27,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:03:27,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:03:11" (1/3) ... [2021-11-23 02:03:27,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0f6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:03:27, skipping insertion in model container [2021-11-23 02:03:27,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:03:14" (2/3) ... [2021-11-23 02:03:27,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0f6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:03:27, skipping insertion in model container [2021-11-23 02:03:27,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:03:27" (3/3) ... [2021-11-23 02:03:27,895 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--digi_acceleport.ko-entry_point.cil.out.i [2021-11-23 02:03:27,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:03:27,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:03:27,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:03:27,985 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:03:27,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:03:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 1042 states, 652 states have (on average 1.3849693251533743) internal successors, (903), 670 states have internal predecessors, (903), 329 states have call successors, (329), 60 states have call predecessors, (329), 59 states have return successors, (324), 320 states have call predecessors, (324), 324 states have call successors, (324) [2021-11-23 02:03:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:03:28,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:28,072 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:28,073 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1828433960, now seen corresponding path program 1 times [2021-11-23 02:03:28,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:28,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58351646] [2021-11-23 02:03:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:28,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 02:03:28,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58351646] [2021-11-23 02:03:28,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58351646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:28,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:28,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:28,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265708891] [2021-11-23 02:03:28,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:28,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:28,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:28,899 INFO L87 Difference]: Start difference. First operand has 1042 states, 652 states have (on average 1.3849693251533743) internal successors, (903), 670 states have internal predecessors, (903), 329 states have call successors, (329), 60 states have call predecessors, (329), 59 states have return successors, (324), 320 states have call predecessors, (324), 324 states have call successors, (324) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 02:03:30,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:33,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:35,074 INFO L93 Difference]: Finished difference Result 2857 states and 4380 transitions. [2021-11-23 02:03:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-11-23 02:03:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:35,110 INFO L225 Difference]: With dead ends: 2857 [2021-11-23 02:03:35,111 INFO L226 Difference]: Without dead ends: 1830 [2021-11-23 02:03:35,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:35,131 INFO L933 BasicCegarLoop]: 1717 mSDtfsCounter, 1156 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:35,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2996 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-23 02:03:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-11-23 02:03:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1824. [2021-11-23 02:03:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1140 states have (on average 1.3614035087719298) internal successors, (1552), 1162 states have internal predecessors, (1552), 570 states have call successors, (570), 115 states have call predecessors, (570), 113 states have return successors, (569), 560 states have call predecessors, (569), 569 states have call successors, (569) [2021-11-23 02:03:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2691 transitions. [2021-11-23 02:03:35,414 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2691 transitions. Word has length 114 [2021-11-23 02:03:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:35,416 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2691 transitions. [2021-11-23 02:03:35,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 02:03:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2691 transitions. [2021-11-23 02:03:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:03:35,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:35,424 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:35,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:03:35,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1428856114, now seen corresponding path program 1 times [2021-11-23 02:03:35,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:35,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611063699] [2021-11-23 02:03:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:35,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 02:03:35,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:35,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611063699] [2021-11-23 02:03:35,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611063699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:35,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:35,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:35,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186471128] [2021-11-23 02:03:35,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:35,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:35,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:35,744 INFO L87 Difference]: Start difference. First operand 1824 states and 2691 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 02:03:37,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:40,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:41,803 INFO L93 Difference]: Finished difference Result 4466 states and 6565 transitions. [2021-11-23 02:03:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-11-23 02:03:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:41,826 INFO L225 Difference]: With dead ends: 4466 [2021-11-23 02:03:41,827 INFO L226 Difference]: Without dead ends: 2672 [2021-11-23 02:03:41,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:41,845 INFO L933 BasicCegarLoop]: 2388 mSDtfsCounter, 1138 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:41,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 3644 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 493 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-23 02:03:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-11-23 02:03:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2665. [2021-11-23 02:03:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 1666 states have (on average 1.3565426170468187) internal successors, (2260), 1700 states have internal predecessors, (2260), 825 states have call successors, (825), 176 states have call predecessors, (825), 173 states have return successors, (824), 809 states have call predecessors, (824), 824 states have call successors, (824) [2021-11-23 02:03:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 3909 transitions. [2021-11-23 02:03:42,013 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 3909 transitions. Word has length 114 [2021-11-23 02:03:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:42,014 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 3909 transitions. [2021-11-23 02:03:42,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 02:03:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 3909 transitions. [2021-11-23 02:03:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-23 02:03:42,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:42,027 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:42,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:03:42,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1151051903, now seen corresponding path program 1 times [2021-11-23 02:03:42,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166709055] [2021-11-23 02:03:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:42,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-23 02:03:42,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166709055] [2021-11-23 02:03:42,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166709055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:42,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:42,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609305118] [2021-11-23 02:03:42,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:42,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:42,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:42,416 INFO L87 Difference]: Start difference. First operand 2665 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:03:44,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:46,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:49,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:49,690 INFO L93 Difference]: Finished difference Result 6581 states and 9663 transitions. [2021-11-23 02:03:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 219 [2021-11-23 02:03:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:49,723 INFO L225 Difference]: With dead ends: 6581 [2021-11-23 02:03:49,723 INFO L226 Difference]: Without dead ends: 3946 [2021-11-23 02:03:49,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:49,739 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 1267 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 75 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:49,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 2981 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 423 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2021-11-23 02:03:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3946 states. [2021-11-23 02:03:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3946 to 3940. [2021-11-23 02:03:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 2497 states have (on average 1.3380056067280737) internal successors, (3341), 2545 states have internal predecessors, (3341), 1173 states have call successors, (1173), 274 states have call predecessors, (1173), 269 states have return successors, (1172), 1150 states have call predecessors, (1172), 1172 states have call successors, (1172) [2021-11-23 02:03:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 5686 transitions. [2021-11-23 02:03:49,941 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 5686 transitions. Word has length 219 [2021-11-23 02:03:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:49,942 INFO L470 AbstractCegarLoop]: Abstraction has 3940 states and 5686 transitions. [2021-11-23 02:03:49,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:03:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 5686 transitions. [2021-11-23 02:03:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-23 02:03:49,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:49,949 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:49,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:03:49,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1550629749, now seen corresponding path program 1 times [2021-11-23 02:03:49,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736416145] [2021-11-23 02:03:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:49,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-23 02:03:50,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:50,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736416145] [2021-11-23 02:03:50,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736416145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:50,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:50,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:50,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606339170] [2021-11-23 02:03:50,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:50,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:50,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:50,231 INFO L87 Difference]: Start difference. First operand 3940 states and 5686 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:03:52,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:54,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:55,721 INFO L93 Difference]: Finished difference Result 9621 states and 13910 transitions. [2021-11-23 02:03:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 219 [2021-11-23 02:03:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:55,766 INFO L225 Difference]: With dead ends: 9621 [2021-11-23 02:03:55,766 INFO L226 Difference]: Without dead ends: 5717 [2021-11-23 02:03:55,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:55,787 INFO L933 BasicCegarLoop]: 1969 mSDtfsCounter, 1261 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:55,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1267 Valid, 3190 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:03:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2021-11-23 02:03:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 5710. [2021-11-23 02:03:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 3679 states have (on average 1.3188366403914107) internal successors, (4852), 3745 states have internal predecessors, (4852), 1623 states have call successors, (1623), 415 states have call predecessors, (1623), 407 states have return successors, (1622), 1590 states have call predecessors, (1622), 1622 states have call successors, (1622) [2021-11-23 02:03:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 8097 transitions. [2021-11-23 02:03:56,084 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 8097 transitions. Word has length 219 [2021-11-23 02:03:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:56,086 INFO L470 AbstractCegarLoop]: Abstraction has 5710 states and 8097 transitions. [2021-11-23 02:03:56,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:03:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 8097 transitions. [2021-11-23 02:03:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-23 02:03:56,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:56,092 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:56,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:03:56,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash -264454885, now seen corresponding path program 1 times [2021-11-23 02:03:56,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:56,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025221294] [2021-11-23 02:03:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:56,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2021-11-23 02:03:56,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:56,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025221294] [2021-11-23 02:03:56,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025221294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:56,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:56,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:56,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072134389] [2021-11-23 02:03:56,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:56,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:56,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:56,371 INFO L87 Difference]: Start difference. First operand 5710 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:03:58,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:59,212 INFO L93 Difference]: Finished difference Result 5869 states and 8271 transitions. [2021-11-23 02:03:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 220 [2021-11-23 02:03:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:59,255 INFO L225 Difference]: With dead ends: 5869 [2021-11-23 02:03:59,255 INFO L226 Difference]: Without dead ends: 5866 [2021-11-23 02:03:59,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:59,260 INFO L933 BasicCegarLoop]: 1435 mSDtfsCounter, 1259 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:59,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 1634 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:03:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-11-23 02:03:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5804. [2021-11-23 02:03:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5804 states, 3734 states have (on average 1.3141403320835565) internal successors, (4907), 3800 states have internal predecessors, (4907), 1636 states have call successors, (1636), 449 states have call predecessors, (1636), 433 states have return successors, (1635), 1595 states have call predecessors, (1635), 1635 states have call successors, (1635) [2021-11-23 02:03:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 8178 transitions. [2021-11-23 02:03:59,584 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 8178 transitions. Word has length 220 [2021-11-23 02:03:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:59,588 INFO L470 AbstractCegarLoop]: Abstraction has 5804 states and 8178 transitions. [2021-11-23 02:03:59,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:03:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 8178 transitions. [2021-11-23 02:03:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-23 02:03:59,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:59,593 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:59,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:03:59,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1796975676, now seen corresponding path program 1 times [2021-11-23 02:03:59,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:59,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538376795] [2021-11-23 02:03:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:59,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2021-11-23 02:04:00,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538376795] [2021-11-23 02:04:00,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538376795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:00,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685485950] [2021-11-23 02:04:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:00,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:00,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:00,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:04:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:01,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:04:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2021-11-23 02:04:01,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:04:01,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685485950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:01,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:04:01,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:04:01,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733374759] [2021-11-23 02:04:01,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:01,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:04:01,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:04:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:04:01,969 INFO L87 Difference]: Start difference. First operand 5804 states and 8178 transitions. Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 02:04:04,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:06,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:08,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:09,662 INFO L93 Difference]: Finished difference Result 11594 states and 16345 transitions. [2021-11-23 02:04:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:04:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 227 [2021-11-23 02:04:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:09,710 INFO L225 Difference]: With dead ends: 11594 [2021-11-23 02:04:09,710 INFO L226 Difference]: Without dead ends: 5805 [2021-11-23 02:04:09,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:04:09,742 INFO L933 BasicCegarLoop]: 1423 mSDtfsCounter, 1 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4249 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:09,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 4249 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 365 Invalid, 3 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 02:04:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2021-11-23 02:04:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5805. [2021-11-23 02:04:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5805 states, 3735 states have (on average 1.3140562248995984) internal successors, (4908), 3801 states have internal predecessors, (4908), 1636 states have call successors, (1636), 449 states have call predecessors, (1636), 433 states have return successors, (1635), 1595 states have call predecessors, (1635), 1635 states have call successors, (1635) [2021-11-23 02:04:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5805 states to 5805 states and 8179 transitions. [2021-11-23 02:04:10,037 INFO L78 Accepts]: Start accepts. Automaton has 5805 states and 8179 transitions. Word has length 227 [2021-11-23 02:04:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:10,038 INFO L470 AbstractCegarLoop]: Abstraction has 5805 states and 8179 transitions. [2021-11-23 02:04:10,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 02:04:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5805 states and 8179 transitions. [2021-11-23 02:04:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-23 02:04:10,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:10,044 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:10,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:10,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:04:10,257 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:10,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:10,258 INFO L85 PathProgramCache]: Analyzing trace with hash -998244541, now seen corresponding path program 1 times [2021-11-23 02:04:10,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:10,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450998282] [2021-11-23 02:04:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:10,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-23 02:04:10,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450998282] [2021-11-23 02:04:10,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450998282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:10,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81449522] [2021-11-23 02:04:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:10,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:10,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:10,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491afe78-b944-4a6b-81e1-a36ab436c3bf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:04:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:04:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 368 proven. 1 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-23 02:04:13,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-23 02:04:14,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81449522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577363136] [2021-11-23 02:04:14,488 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-23 02:04:14,488 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:04:14,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:04:14,499 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:04:14,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:04:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-23 02:04:16,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-23 02:04:16,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-23 02:04:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-23 02:04:16,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:16,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:16,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:16,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 599 treesize of output 510 [2021-11-23 02:04:17,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-23 02:04:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:20,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:23,868 INFO L244 Elim1Store]: Index analysis took 6303 ms