./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.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_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/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_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/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_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/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 5b9b8810066c6b805a125dba67c1c1409161534a09c0fedd6964ff3375355a5b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:31:55,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:31:55,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:31:55,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:31:55,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:31:55,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:31:55,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:31:55,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:31:55,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:31:55,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:31:55,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:31:55,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:31:55,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:31:55,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:31:55,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:31:55,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:31:55,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:31:55,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:31:55,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:31:55,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:31:55,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:31:55,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:31:55,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:31:55,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:31:55,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:31:55,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:31:55,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:31:55,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:31:55,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:31:55,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:31:55,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:31:55,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:31:55,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:31:55,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:31:55,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:31:55,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:31:55,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:31:55,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:31:55,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:31:55,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:31:55,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:31:55,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:31:55,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:31:55,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:31:55,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:31:55,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:31:55,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:31:55,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:31:55,237 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:31:55,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:31:55,238 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:31:55,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:31:55,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:31:55,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:31:55,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:31:55,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:31:55,240 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:31:55,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:31:55,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:31:55,241 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:31:55,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:31:55,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:31:55,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:31:55,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:31:55,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:31:55,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:31:55,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:31:55,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:31:55,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:31:55,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:31:55,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:31:55,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:31:55,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:31:55,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:31:55,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:31:55,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:31:55,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:31:55,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:31:55,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:31:55,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:31:55,245 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_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b9b8810066c6b805a125dba67c1c1409161534a09c0fedd6964ff3375355a5b [2021-11-23 03:31:55,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:31:55,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:31:55,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:31:55,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:31:55,621 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:31:55,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.ko-entry_point.cil.out.i [2021-11-23 03:31:55,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/data/7bb240348/ca914b8f062f4350b42f6d9f8339b3e9/FLAG38fb42fa0 [2021-11-23 03:31:56,615 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:31:56,616 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.ko-entry_point.cil.out.i [2021-11-23 03:31:56,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/data/7bb240348/ca914b8f062f4350b42f6d9f8339b3e9/FLAG38fb42fa0 [2021-11-23 03:31:57,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/data/7bb240348/ca914b8f062f4350b42f6d9f8339b3e9 [2021-11-23 03:31:57,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:31:57,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:31:57,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:31:57,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:31:57,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:31:57,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:57" (1/1) ... [2021-11-23 03:31:57,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ecfb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:57, skipping insertion in model container [2021-11-23 03:31:57,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:57" (1/1) ... [2021-11-23 03:31:57,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:31:57,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:31:58,863 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_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.ko-entry_point.cil.out.i[196184,196197] [2021-11-23 03:32:00,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:32:00,336 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:32:00,526 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_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.ko-entry_point.cil.out.i[196184,196197] [2021-11-23 03:32:00,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:32:01,180 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:32:01,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01 WrapperNode [2021-11-23 03:32:01,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:32:01,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:32:01,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:32:01,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:32:01,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,522 INFO L137 Inliner]: procedures = 372, calls = 2044, calls flagged for inlining = 175, calls inlined = 127, statements flattened = 4346 [2021-11-23 03:32:01,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:32:01,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:32:01,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:32:01,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:32:01,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:32:01,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:32:01,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:32:01,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:32:01,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (1/1) ... [2021-11-23 03:32:01,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:32:01,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:01,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:32:01,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:32:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-23 03:32:01,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-23 03:32:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 03:32:01,881 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 03:32:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 03:32:01,881 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 03:32:01,881 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 03:32:01,881 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 03:32:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure device_set_wakeup_enable [2021-11-23 03:32:01,882 INFO L138 BoogieDeclarations]: Found implementation of procedure device_set_wakeup_enable [2021-11-23 03:32:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_write_byte [2021-11-23 03:32:01,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_write_byte [2021-11-23 03:32:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:32:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:32:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:32:01,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:32:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_work_func_t [2021-11-23 03:32:01,883 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_work_func_t [2021-11-23 03:32:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work_sync [2021-11-23 03:32:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work_sync [2021-11-23 03:32:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 03:32:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 03:32:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 03:32:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 03:32:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:32:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:32:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_disconnect [2021-11-23 03:32:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_disconnect [2021-11-23 03:32:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_enable [2021-11-23 03:32:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_enable [2021-11-23 03:32:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-23 03:32:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-23 03:32:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure set_carrier [2021-11-23 03:32:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure set_carrier [2021-11-23 03:32:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_set_speed [2021-11-23 03:32:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_set_speed [2021-11-23 03:32:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-23 03:32:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-23 03:32:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_head_init [2021-11-23 03:32:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_head_init [2021-11-23 03:32:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-23 03:32:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-23 03:32:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:32:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:32:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure pla_ocp_read [2021-11-23 03:32:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure pla_ocp_read [2021-11-23 03:32:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-23 03:32:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-23 03:32:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 03:32:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 03:32:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_nic_reset [2021-11-23 03:32:01,890 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_nic_reset [2021-11-23 03:32:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:32:01,890 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:32:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_reg_read [2021-11-23 03:32:01,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_reg_read [2021-11-23 03:32:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:32:01,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:32:01,891 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 03:32:01,891 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 03:32:01,891 INFO L130 BoogieDeclarations]: Found specification of procedure generic_ocp_write [2021-11-23 03:32:01,891 INFO L138 BoogieDeclarations]: Found implementation of procedure generic_ocp_write [2021-11-23 03:32:01,892 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_schedule [2021-11-23 03:32:01,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_schedule [2021-11-23 03:32:01,892 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:32:01,892 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:32:01,892 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_set_eee_plus [2021-11-23 03:32:01,893 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_set_eee_plus [2021-11-23 03:32:01,893 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_write_dword [2021-11-23 03:32:01,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_write_dword [2021-11-23 03:32:01,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:32:01,893 INFO L130 BoogieDeclarations]: Found specification of procedure tx_agg_align [2021-11-23 03:32:01,893 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_agg_align [2021-11-23 03:32:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:32:01,894 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:32:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2021-11-23 03:32:01,894 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2021-11-23 03:32:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 03:32:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 03:32:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:32:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-23 03:32:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-23 03:32:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure pla_ocp_write [2021-11-23 03:32:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure pla_ocp_write [2021-11-23 03:32:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 03:32:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 03:32:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 03:32:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 03:32:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-23 03:32:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:32:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:32:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_get_speed [2021-11-23 03:32:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_get_speed [2021-11-23 03:32:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_reg_write [2021-11-23 03:32:01,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_reg_write [2021-11-23 03:32:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_tx_timeout [2021-11-23 03:32:01,898 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_tx_timeout [2021-11-23 03:32:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_disable [2021-11-23 03:32:01,898 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_disable [2021-11-23 03:32:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_read_dword [2021-11-23 03:32:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_read_dword [2021-11-23 03:32:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:32:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:32:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure rx_agg_align [2021-11-23 03:32:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_agg_align [2021-11-23 03:32:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure __rtl_get_wol [2021-11-23 03:32:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __rtl_get_wol [2021-11-23 03:32:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure r8152_mdio_write [2021-11-23 03:32:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152_mdio_write [2021-11-23 03:32:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-23 03:32:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-23 03:32:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:32:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:32:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-23 03:32:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-23 03:32:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___skb_dequeue_14 [2021-11-23 03:32:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___skb_dequeue_14 [2021-11-23 03:32:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure r8152_submit_rx [2021-11-23 03:32:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152_submit_rx [2021-11-23 03:32:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 03:32:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 03:32:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-23 03:32:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-23 03:32:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 03:32:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 03:32:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 03:32:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 03:32:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure __rtl_set_wol [2021-11-23 03:32:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __rtl_set_wol [2021-11-23 03:32:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure r8152_power_cut_en [2021-11-23 03:32:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152_power_cut_en [2021-11-23 03:32:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_write_word [2021-11-23 03:32:01,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_write_word [2021-11-23 03:32:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 03:32:01,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 03:32:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure r8152b_enable_fc [2021-11-23 03:32:01,905 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152b_enable_fc [2021-11-23 03:32:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:32:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 03:32:01,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 03:32:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 03:32:01,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 03:32:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 03:32:01,906 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 03:32:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:32:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2021-11-23 03:32:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2021-11-23 03:32:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-23 03:32:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-23 03:32:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:32:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 03:32:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 03:32:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_splice_init [2021-11-23 03:32:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_splice_init [2021-11-23 03:32:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_disable [2021-11-23 03:32:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_disable [2021-11-23 03:32:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:32:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:32:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-23 03:32:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-23 03:32:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_node [2021-11-23 03:32:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_node [2021-11-23 03:32:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 03:32:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 03:32:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 03:32:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 03:32:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 03:32:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 03:32:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure sram_read [2021-11-23 03:32:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure sram_read [2021-11-23 03:32:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:32:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:32:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-23 03:32:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-23 03:32:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure r8153_teredo_off [2021-11-23 03:32:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure r8153_teredo_off [2021-11-23 03:32:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:32:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-23 03:32:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-23 03:32:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_open [2021-11-23 03:32:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_open [2021-11-23 03:32:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:32:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:32:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-23 03:32:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-23 03:32:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_runtime_suspend_enable [2021-11-23 03:32:01,914 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_runtime_suspend_enable [2021-11-23 03:32:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_close [2021-11-23 03:32:01,914 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_close [2021-11-23 03:32:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure r8153_power_cut_en [2021-11-23 03:32:01,914 INFO L138 BoogieDeclarations]: Found implementation of procedure r8153_power_cut_en [2021-11-23 03:32:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure r8153_u1u2en [2021-11-23 03:32:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure r8153_u1u2en [2021-11-23 03:32:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure generic_ocp_read [2021-11-23 03:32:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure generic_ocp_read [2021-11-23 03:32:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:32:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure r8153_enable_aldps [2021-11-23 03:32:01,916 INFO L138 BoogieDeclarations]: Found implementation of procedure r8153_enable_aldps [2021-11-23 03:32:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_tally_reset [2021-11-23 03:32:01,916 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_tally_reset [2021-11-23 03:32:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_drop_queued_tx [2021-11-23 03:32:01,917 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_drop_queued_tx [2021-11-23 03:32:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure r8152_mdio_read [2021-11-23 03:32:01,917 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152_mdio_read [2021-11-23 03:32:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_resume [2021-11-23 03:32:01,917 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_resume [2021-11-23 03:32:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:32:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure rxdy_gated_en [2021-11-23 03:32:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure rxdy_gated_en [2021-11-23 03:32:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 03:32:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 03:32:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure rtl_clear_bp [2021-11-23 03:32:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl_clear_bp [2021-11-23 03:32:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:32:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:32:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:32:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure r8152b_enable_aldps [2021-11-23 03:32:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152b_enable_aldps [2021-11-23 03:32:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:32:01,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:32:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-23 03:32:01,920 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-23 03:32:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_splice [2021-11-23 03:32:01,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_splice [2021-11-23 03:32:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-23 03:32:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-23 03:32:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure free_all_mem [2021-11-23 03:32:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure free_all_mem [2021-11-23 03:32:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 03:32:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 03:32:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2021-11-23 03:32:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2021-11-23 03:32:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_read_byte [2021-11-23 03:32:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_read_byte [2021-11-23 03:32:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_set_mac_address [2021-11-23 03:32:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_set_mac_address [2021-11-23 03:32:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure sram_write [2021-11-23 03:32:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure sram_write [2021-11-23 03:32:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure ocp_read_word [2021-11-23 03:32:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ocp_read_word [2021-11-23 03:32:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 03:32:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 03:32:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure set_tx_qlen [2021-11-23 03:32:01,924 INFO L138 BoogieDeclarations]: Found implementation of procedure set_tx_qlen [2021-11-23 03:32:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 03:32:01,924 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 03:32:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_set_rx_mode [2021-11-23 03:32:01,924 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_set_rx_mode [2021-11-23 03:32:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8152_ioctl [2021-11-23 03:32:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8152_ioctl [2021-11-23 03:32:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-11-23 03:32:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-11-23 03:32:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure get_registers [2021-11-23 03:32:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure get_registers [2021-11-23 03:32:01,926 INFO L130 BoogieDeclarations]: Found specification of procedure r8152b_disable_aldps [2021-11-23 03:32:01,926 INFO L138 BoogieDeclarations]: Found implementation of procedure r8152b_disable_aldps [2021-11-23 03:32:01,926 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 03:32:01,926 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 03:32:01,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:32:01,926 INFO L130 BoogieDeclarations]: Found specification of procedure set_registers [2021-11-23 03:32:01,927 INFO L138 BoogieDeclarations]: Found implementation of procedure set_registers [2021-11-23 03:32:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-23 03:32:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:32:01,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:32:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_enable [2021-11-23 03:32:01,927 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_enable [2021-11-23 03:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:32:01,928 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:32:02,824 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:32:02,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:32:02,950 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:32:43,477 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:32:45,106 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:32:45,106 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-23 03:32:45,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:45 BoogieIcfgContainer [2021-11-23 03:32:45,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:32:45,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:32:45,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:32:45,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:32:45,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:57" (1/3) ... [2021-11-23 03:32:45,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7e24e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:45, skipping insertion in model container [2021-11-23 03:32:45,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:01" (2/3) ... [2021-11-23 03:32:45,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7e24e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:45, skipping insertion in model container [2021-11-23 03:32:45,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:45" (3/3) ... [2021-11-23 03:32:45,123 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--r8152.ko-entry_point.cil.out.i [2021-11-23 03:32:45,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:32:45,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:32:45,196 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:32:45,204 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 03:32:45,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:32:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1027 states have (on average 1.3174294060370009) internal successors, (1353), 1091 states have internal predecessors, (1353), 689 states have call successors, (689), 125 states have call predecessors, (689), 124 states have return successors, (684), 669 states have call predecessors, (684), 684 states have call successors, (684) [2021-11-23 03:32:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 03:32:45,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:45,280 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:45,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1202768330, now seen corresponding path program 1 times [2021-11-23 03:32:45,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:45,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511858245] [2021-11-23 03:32:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:45,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 03:32:46,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511858245] [2021-11-23 03:32:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511858245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:46,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:46,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:46,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915210530] [2021-11-23 03:32:46,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:46,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:32:46,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:32:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:46,487 INFO L87 Difference]: Start difference. First operand has 1831 states, 1027 states have (on average 1.3174294060370009) internal successors, (1353), 1091 states have internal predecessors, (1353), 689 states have call successors, (689), 125 states have call predecessors, (689), 124 states have return successors, (684), 669 states have call predecessors, (684), 684 states have call successors, (684) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-23 03:32:48,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:51,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:53,366 WARN L534 Checker$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 03:32:56,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:59,213 INFO L93 Difference]: Finished difference Result 5323 states and 7990 transitions. [2021-11-23 03:32:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:32:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 64 [2021-11-23 03:32:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:59,313 INFO L225 Difference]: With dead ends: 5323 [2021-11-23 03:32:59,314 INFO L226 Difference]: Without dead ends: 3497 [2021-11-23 03:32:59,351 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 03:32:59,356 INFO L933 BasicCegarLoop]: 3751 mSDtfsCounter, 2528 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2528 SdHoareTripleChecker+Valid, 6195 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:59,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2528 Valid, 6195 Invalid, 487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 477 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2021-11-23 03:32:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2021-11-23 03:32:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3496. [2021-11-23 03:32:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 1936 states have (on average 1.3083677685950412) internal successors, (2533), 2027 states have internal predecessors, (2533), 1314 states have call successors, (1314), 246 states have call predecessors, (1314), 245 states have return successors, (1313), 1282 states have call predecessors, (1313), 1313 states have call successors, (1313) [2021-11-23 03:32:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 5160 transitions. [2021-11-23 03:32:59,805 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 5160 transitions. Word has length 64 [2021-11-23 03:32:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:59,807 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 5160 transitions. [2021-11-23 03:32:59,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-23 03:32:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 5160 transitions. [2021-11-23 03:32:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 03:32:59,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:59,831 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:59,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:32:59,831 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1556613919, now seen corresponding path program 1 times [2021-11-23 03:32:59,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:59,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453698389] [2021-11-23 03:32:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:59,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 03:33:00,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:00,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453698389] [2021-11-23 03:33:00,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453698389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:00,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:00,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:33:00,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122269279] [2021-11-23 03:33:00,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:00,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:33:00,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:33:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:33:00,342 INFO L87 Difference]: Start difference. First operand 3496 states and 5160 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:33:02,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:05,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:07,346 WARN L534 Checker$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 03:33:10,015 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 03:33:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:14,548 INFO L93 Difference]: Finished difference Result 6925 states and 10288 transitions. [2021-11-23 03:33:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:33:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2021-11-23 03:33:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:14,671 INFO L225 Difference]: With dead ends: 6925 [2021-11-23 03:33:14,672 INFO L226 Difference]: Without dead ends: 6920 [2021-11-23 03:33:14,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:33:14,684 INFO L933 BasicCegarLoop]: 3828 mSDtfsCounter, 2524 mSDsluCounter, 6754 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 10124 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:14,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2524 Valid, 10124 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 757 Invalid, 4 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 03:33:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2021-11-23 03:33:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 6909. [2021-11-23 03:33:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6909 states, 3819 states have (on average 1.309505106048704) internal successors, (5001), 4002 states have internal predecessors, (5001), 2600 states have call successors, (2600), 490 states have call predecessors, (2600), 489 states have return successors, (2667), 2534 states have call predecessors, (2667), 2599 states have call successors, (2667) [2021-11-23 03:33:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6909 states to 6909 states and 10268 transitions. [2021-11-23 03:33:15,234 INFO L78 Accepts]: Start accepts. Automaton has 6909 states and 10268 transitions. Word has length 73 [2021-11-23 03:33:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:15,237 INFO L470 AbstractCegarLoop]: Abstraction has 6909 states and 10268 transitions. [2021-11-23 03:33:15,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:33:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6909 states and 10268 transitions. [2021-11-23 03:33:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 03:33:15,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:15,245 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-23 03:33:15,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:33:15,247 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 164915593, now seen corresponding path program 1 times [2021-11-23 03:33:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419426519] [2021-11-23 03:33:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:15,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 03:33:15,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:15,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419426519] [2021-11-23 03:33:15,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419426519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:15,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:15,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:33:15,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056466033] [2021-11-23 03:33:15,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:15,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:33:15,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:33:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:33:15,734 INFO L87 Difference]: Start difference. First operand 6909 states and 10268 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:33:17,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:21,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:23,662 WARN L534 Checker$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 03:33:27,073 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 03:33:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:30,400 INFO L93 Difference]: Finished difference Result 20406 states and 30283 transitions. [2021-11-23 03:33:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:33:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 88 [2021-11-23 03:33:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:30,635 INFO L225 Difference]: With dead ends: 20406 [2021-11-23 03:33:30,636 INFO L226 Difference]: Without dead ends: 13516 [2021-11-23 03:33:30,868 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 03:33:30,872 INFO L933 BasicCegarLoop]: 4103 mSDtfsCounter, 2432 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2432 SdHoareTripleChecker+Valid, 6529 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:30,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2432 Valid, 6529 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 497 Invalid, 4 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 03:33:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2021-11-23 03:33:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 13509. [2021-11-23 03:33:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13509 states, 7439 states have (on average 1.3071649415243984) internal successors, (9724), 7788 states have internal predecessors, (9724), 5092 states have call successors, (5092), 978 states have call predecessors, (5092), 977 states have return successors, (5217), 4968 states have call predecessors, (5217), 5091 states have call successors, (5217) [2021-11-23 03:33:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13509 states to 13509 states and 20033 transitions. [2021-11-23 03:33:31,879 INFO L78 Accepts]: Start accepts. Automaton has 13509 states and 20033 transitions. Word has length 88 [2021-11-23 03:33:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:31,880 INFO L470 AbstractCegarLoop]: Abstraction has 13509 states and 20033 transitions. [2021-11-23 03:33:31,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:33:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 13509 states and 20033 transitions. [2021-11-23 03:33:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 03:33:31,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:31,893 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:33:31,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:33:31,894 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1176895287, now seen corresponding path program 1 times [2021-11-23 03:33:31,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:31,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899096852] [2021-11-23 03:33:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:31,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 03:33:32,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:32,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899096852] [2021-11-23 03:33:32,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899096852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:32,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:32,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:33:32,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934529239] [2021-11-23 03:33:32,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:32,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:33:32,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:33:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:33:32,375 INFO L87 Difference]: Start difference. First operand 13509 states and 20033 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:33:34,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:37,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:39,078 WARN L534 Checker$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 03:33:42,050 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 03:33:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:44,643 INFO L93 Difference]: Finished difference Result 39767 states and 58898 transitions. [2021-11-23 03:33:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:33:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 100 [2021-11-23 03:33:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:44,992 INFO L225 Difference]: With dead ends: 39767 [2021-11-23 03:33:44,993 INFO L226 Difference]: Without dead ends: 26277 [2021-11-23 03:33:45,431 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 03:33:45,435 INFO L933 BasicCegarLoop]: 3769 mSDtfsCounter, 2393 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 6187 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:45,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2393 Valid, 6187 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 484 Invalid, 4 Unknown, 0 Unchecked, 11.5s Time] [2021-11-23 03:33:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26277 states. [2021-11-23 03:33:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26277 to 26271. [2021-11-23 03:33:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26271 states, 14367 states have (on average 1.3024987819308136) internal successors, (18713), 15060 states have internal predecessors, (18713), 9958 states have call successors, (9958), 1946 states have call predecessors, (9958), 1945 states have return successors, (10209), 9714 states have call predecessors, (10209), 9957 states have call successors, (10209) [2021-11-23 03:33:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26271 states to 26271 states and 38880 transitions. [2021-11-23 03:33:47,759 INFO L78 Accepts]: Start accepts. Automaton has 26271 states and 38880 transitions. Word has length 100 [2021-11-23 03:33:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:47,762 INFO L470 AbstractCegarLoop]: Abstraction has 26271 states and 38880 transitions. [2021-11-23 03:33:47,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:33:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26271 states and 38880 transitions. [2021-11-23 03:33:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 03:33:47,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:47,771 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:33:47,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -988066023, now seen corresponding path program 1 times [2021-11-23 03:33:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574568067] [2021-11-23 03:33:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:47,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-23 03:33:48,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574568067] [2021-11-23 03:33:48,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574568067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:48,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:48,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:33:48,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717659098] [2021-11-23 03:33:48,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:48,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:33:48,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:48,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:33:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:33:48,173 INFO L87 Difference]: Start difference. First operand 26271 states and 38880 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:33:50,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:53,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:55,562 WARN L534 Checker$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 03:33:57,769 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 03:34:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:00,439 INFO L93 Difference]: Finished difference Result 42646 states and 63068 transitions. [2021-11-23 03:34:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:34:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 103 [2021-11-23 03:34:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:00,727 INFO L225 Difference]: With dead ends: 42646 [2021-11-23 03:34:00,727 INFO L226 Difference]: Without dead ends: 16392 [2021-11-23 03:34:00,916 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 03:34:00,917 INFO L933 BasicCegarLoop]: 2441 mSDtfsCounter, 5 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4879 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:00,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4879 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 393 Invalid, 4 Unknown, 0 Unchecked, 11.1s Time] [2021-11-23 03:34:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16392 states. [2021-11-23 03:34:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16392 to 16348. [2021-11-23 03:34:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16348 states, 8922 states have (on average 1.3006052454606591) internal successors, (11604), 9351 states have internal predecessors, (11604), 6202 states have call successors, (6202), 1224 states have call predecessors, (6202), 1223 states have return successors, (6356), 6052 states have call predecessors, (6356), 6201 states have call successors, (6356) [2021-11-23 03:34:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16348 states to 16348 states and 24162 transitions. [2021-11-23 03:34:02,223 INFO L78 Accepts]: Start accepts. Automaton has 16348 states and 24162 transitions. Word has length 103 [2021-11-23 03:34:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:02,224 INFO L470 AbstractCegarLoop]: Abstraction has 16348 states and 24162 transitions. [2021-11-23 03:34:02,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:34:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16348 states and 24162 transitions. [2021-11-23 03:34:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 03:34:02,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:02,237 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:02,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:34:02,237 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1873125575, now seen corresponding path program 1 times [2021-11-23 03:34:02,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537552868] [2021-11-23 03:34:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:02,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-23 03:34:02,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537552868] [2021-11-23 03:34:02,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537552868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:34:02,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:34:02,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:34:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078725375] [2021-11-23 03:34:02,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:34:02,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:34:02,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:34:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:34:02,916 INFO L87 Difference]: Start difference. First operand 16348 states and 24162 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 03:34:04,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:08,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:10,503 WARN L534 Checker$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 03:34:11,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:13,920 WARN L534 Checker$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 03:34:15,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:17,694 WARN L534 Checker$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 03:34:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:20,191 INFO L93 Difference]: Finished difference Result 22943 states and 33979 transitions. [2021-11-23 03:34:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:34:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 121 [2021-11-23 03:34:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:20,458 INFO L225 Difference]: With dead ends: 22943 [2021-11-23 03:34:20,458 INFO L226 Difference]: Without dead ends: 22937 [2021-11-23 03:34:20,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:34:20,478 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 2511 mSDsluCounter, 6138 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 9014 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:20,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 9014 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 5 Unknown, 0 Unchecked, 16.6s Time] [2021-11-23 03:34:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22937 states. [2021-11-23 03:34:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22937 to 22916. [2021-11-23 03:34:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22916 states, 12510 states have (on average 1.3011990407673861) internal successors, (16278), 13111 states have internal predecessors, (16278), 8692 states have call successors, (8692), 1714 states have call predecessors, (8692), 1713 states have return successors, (8972), 8482 states have call predecessors, (8972), 8691 states have call successors, (8972) [2021-11-23 03:34:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22916 states to 22916 states and 33942 transitions. [2021-11-23 03:34:22,054 INFO L78 Accepts]: Start accepts. Automaton has 22916 states and 33942 transitions. Word has length 121 [2021-11-23 03:34:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:22,056 INFO L470 AbstractCegarLoop]: Abstraction has 22916 states and 33942 transitions. [2021-11-23 03:34:22,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 03:34:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22916 states and 33942 transitions. [2021-11-23 03:34:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-23 03:34:22,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:22,146 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:22,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:34:22,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2044720632, now seen corresponding path program 1 times [2021-11-23 03:34:22,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:22,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783777712] [2021-11-23 03:34:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:22,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-23 03:34:22,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:22,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783777712] [2021-11-23 03:34:22,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783777712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:34:22,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:34:22,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:34:22,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780917502] [2021-11-23 03:34:22,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:34:22,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:34:22,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:34:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:34:22,811 INFO L87 Difference]: Start difference. First operand 22916 states and 33942 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-23 03:34:24,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:28,230 WARN L534 Checker$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 03:34:30,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:31,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:32,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:36,068 INFO L93 Difference]: Finished difference Result 52414 states and 77680 transitions. [2021-11-23 03:34:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:34:36,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 210 [2021-11-23 03:34:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:36,432 INFO L225 Difference]: With dead ends: 52414 [2021-11-23 03:34:36,432 INFO L226 Difference]: Without dead ends: 32653 [2021-11-23 03:34:36,526 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 03:34:36,527 INFO L933 BasicCegarLoop]: 4555 mSDtfsCounter, 2462 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2462 SdHoareTripleChecker+Valid, 6961 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:36,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2462 Valid, 6961 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 557 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-11-23 03:34:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32653 states. [2021-11-23 03:34:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32653 to 32646. [2021-11-23 03:34:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32646 states, 17845 states have (on average 1.3013168954889325) internal successors, (23222), 18693 states have internal predecessors, (23222), 12358 states have call successors, (12358), 2443 states have call predecessors, (12358), 2442 states have return successors, (12754), 12063 states have call predecessors, (12754), 12357 states have call successors, (12754) [2021-11-23 03:34:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32646 states to 32646 states and 48334 transitions. [2021-11-23 03:34:38,834 INFO L78 Accepts]: Start accepts. Automaton has 32646 states and 48334 transitions. Word has length 210 [2021-11-23 03:34:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:38,835 INFO L470 AbstractCegarLoop]: Abstraction has 32646 states and 48334 transitions. [2021-11-23 03:34:38,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-23 03:34:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32646 states and 48334 transitions. [2021-11-23 03:34:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 03:34:38,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:38,936 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:38,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:34:38,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 601102619, now seen corresponding path program 1 times [2021-11-23 03:34:38,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751214282] [2021-11-23 03:34:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:38,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-23 03:34:39,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:39,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751214282] [2021-11-23 03:34:39,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751214282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:34:39,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:34:39,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:34:39,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919985510] [2021-11-23 03:34:39,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:34:39,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:34:39,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:34:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:34:39,455 INFO L87 Difference]: Start difference. First operand 32646 states and 48334 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:34:41,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:43,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:34:45,954 WARN L534 Checker$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 03:34:48,399 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 03:34:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:52,576 INFO L93 Difference]: Finished difference Result 74068 states and 109693 transitions. [2021-11-23 03:34:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:34:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 183 [2021-11-23 03:34:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:53,079 INFO L225 Difference]: With dead ends: 74068 [2021-11-23 03:34:53,079 INFO L226 Difference]: Without dead ends: 41441 [2021-11-23 03:34:53,225 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 03:34:53,225 INFO L933 BasicCegarLoop]: 3831 mSDtfsCounter, 2374 mSDsluCounter, 2563 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2374 SdHoareTripleChecker+Valid, 6207 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:53,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2374 Valid, 6207 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 560 Invalid, 4 Unknown, 0 Unchecked, 11.7s Time] [2021-11-23 03:34:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41441 states. [2021-11-23 03:34:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41441 to 41390. [2021-11-23 03:34:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41390 states, 22519 states have (on average 1.2954394067232116) internal successors, (29172), 23622 states have internal predecessors, (29172), 15712 states have call successors, (15712), 3159 states have call predecessors, (15712), 3158 states have return successors, (16434), 15321 states have call predecessors, (16434), 15711 states have call successors, (16434) [2021-11-23 03:34:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41390 states to 41390 states and 61318 transitions. [2021-11-23 03:34:55,311 INFO L78 Accepts]: Start accepts. Automaton has 41390 states and 61318 transitions. Word has length 183 [2021-11-23 03:34:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:55,311 INFO L470 AbstractCegarLoop]: Abstraction has 41390 states and 61318 transitions. [2021-11-23 03:34:55,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:34:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 41390 states and 61318 transitions. [2021-11-23 03:34:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 03:34:55,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:55,405 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:55,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:34:55,405 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash 883005031, now seen corresponding path program 1 times [2021-11-23 03:34:55,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:55,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162028950] [2021-11-23 03:34:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:55,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-23 03:34:56,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162028950] [2021-11-23 03:34:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162028950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:34:56,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:34:56,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:34:56,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154797895] [2021-11-23 03:34:56,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:34:56,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:34:56,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:34:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:34:56,142 INFO L87 Difference]: Start difference. First operand 41390 states and 61318 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 4 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-23 03:34:58,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:01,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:03,449 WARN L534 Checker$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 03:35:05,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:07,606 WARN L534 Checker$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 03:35:11,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:19,628 WARN L534 Checker$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 03:35:21,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:25,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:26,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:47,181 INFO L93 Difference]: Finished difference Result 63104 states and 94197 transitions. [2021-11-23 03:35:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:35:47,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 4 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 187 [2021-11-23 03:35:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:47,693 INFO L225 Difference]: With dead ends: 63104 [2021-11-23 03:35:47,693 INFO L226 Difference]: Without dead ends: 63098 [2021-11-23 03:35:47,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:35:47,725 INFO L933 BasicCegarLoop]: 2083 mSDtfsCounter, 3266 mSDsluCounter, 3611 mSDsCounter, 0 mSdLazyCounter, 5407 mSolverCounterSat, 3063 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 5449 SdHoareTripleChecker+Invalid, 8476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3063 IncrementalHoareTripleChecker+Valid, 5407 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:47,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3880 Valid, 5449 Invalid, 8476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3063 Valid, 5407 Invalid, 6 Unknown, 0 Unchecked, 48.7s Time] [2021-11-23 03:35:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63098 states. [2021-11-23 03:35:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63098 to 63050. [2021-11-23 03:35:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63050 states, 34303 states have (on average 1.291344780339912) internal successors, (44297), 35937 states have internal predecessors, (44297), 23999 states have call successors, (23999), 4586 states have call predecessors, (23999), 4747 states have return successors, (25820), 23628 states have call predecessors, (25820), 23998 states have call successors, (25820) [2021-11-23 03:35:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63050 states to 63050 states and 94116 transitions. [2021-11-23 03:35:51,293 INFO L78 Accepts]: Start accepts. Automaton has 63050 states and 94116 transitions. Word has length 187 [2021-11-23 03:35:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:51,294 INFO L470 AbstractCegarLoop]: Abstraction has 63050 states and 94116 transitions. [2021-11-23 03:35:51,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 4 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-23 03:35:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 63050 states and 94116 transitions. [2021-11-23 03:35:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-23 03:35:51,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:51,360 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:51,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:35:51,361 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:35:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash 684364846, now seen corresponding path program 1 times [2021-11-23 03:35:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965433432] [2021-11-23 03:35:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:51,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-23 03:35:51,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965433432] [2021-11-23 03:35:51,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965433432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:35:51,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:35:51,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:35:51,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819565804] [2021-11-23 03:35:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:35:51,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:35:51,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:35:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:35:51,914 INFO L87 Difference]: Start difference. First operand 63050 states and 94116 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 03:35:53,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:56,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:35:58,716 WARN L534 Checker$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 03:36:00,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:04,445 WARN L534 Checker$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 03:36:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:10,720 INFO L93 Difference]: Finished difference Result 126305 states and 191282 transitions. [2021-11-23 03:36:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:36:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 221 [2021-11-23 03:36:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:11,640 INFO L225 Difference]: With dead ends: 126305 [2021-11-23 03:36:11,640 INFO L226 Difference]: Without dead ends: 63294 [2021-11-23 03:36:12,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:36:12,286 INFO L933 BasicCegarLoop]: 2440 mSDtfsCounter, 2 mSDsluCounter, 7903 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9755 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:12,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 9755 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 794 Invalid, 4 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 03:36:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63294 states. [2021-11-23 03:36:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63294 to 63202. [2021-11-23 03:36:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63202 states, 34417 states have (on average 1.2903797541912427) internal successors, (44411), 36051 states have internal predecessors, (44411), 23999 states have call successors, (23999), 4586 states have call predecessors, (23999), 4785 states have return successors, (25886), 23666 states have call predecessors, (25886), 23998 states have call successors, (25886) [2021-11-23 03:36:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63202 states to 63202 states and 94296 transitions. [2021-11-23 03:36:15,818 INFO L78 Accepts]: Start accepts. Automaton has 63202 states and 94296 transitions. Word has length 221 [2021-11-23 03:36:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:15,819 INFO L470 AbstractCegarLoop]: Abstraction has 63202 states and 94296 transitions. [2021-11-23 03:36:15,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 03:36:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 63202 states and 94296 transitions. [2021-11-23 03:36:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-23 03:36:15,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:15,896 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:36:15,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:36:15,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -818201153, now seen corresponding path program 1 times [2021-11-23 03:36:15,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:15,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953417540] [2021-11-23 03:36:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:15,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-23 03:36:16,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953417540] [2021-11-23 03:36:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953417540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870836112] [2021-11-23 03:36:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:16,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:16,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:16,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:16,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32cee80-aa64-4130-a2cb-5ccd0a2d347f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:36:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:17,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 2787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:36:17,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 169 proven. 24 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-23 03:36:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-23 03:36:22,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870836112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:22,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987120779] [2021-11-23 03:36:22,412 INFO L159 IcfgInterpreter]: Started Sifa with 163 locations of interest [2021-11-23 03:36:22,412 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:22,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:22,425 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:22,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs