./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.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_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/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_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/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_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/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 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:10:23,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:10:23,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:10:23,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:10:23,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:10:23,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:10:23,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:10:23,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:10:23,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:10:23,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:10:23,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:10:23,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:10:23,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:10:23,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:10:23,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:10:23,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:10:23,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:10:23,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:10:23,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:10:23,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:10:23,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:10:23,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:10:23,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:10:23,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:10:23,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:10:23,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:10:23,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:10:23,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:10:23,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:10:23,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:10:23,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:10:23,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:10:23,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:10:23,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:10:23,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:10:23,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:10:23,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:10:23,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:10:23,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:10:23,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:10:23,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:10:23,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:10:23,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:10:23,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:10:23,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:10:23,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:10:23,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:10:23,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:10:23,562 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:10:23,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:10:23,562 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:10:23,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:10:23,563 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:10:23,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:10:23,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:10:23,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:10:23,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:10:23,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:10:23,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:10:23,565 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:10:23,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:10:23,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:10:23,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:10:23,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:10:23,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:10:23,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:10:23,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:10:23,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:10:23,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:10:23,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:10:23,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:10:23,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:23,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:10:23,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:10:23,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:10:23,571 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:10:23,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:10:23,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:10:23,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:10:23,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:10:23,572 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_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 [2021-11-23 02:10:23,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:10:23,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:10:23,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:10:23,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:10:23,844 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:10:23,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-23 02:10:23,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/data/eee9c0152/ddf7d0ed256c494b9603a277ced59aeb/FLAGcec419f37 [2021-11-23 02:10:24,887 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:10:24,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-23 02:10:24,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/data/eee9c0152/ddf7d0ed256c494b9603a277ced59aeb/FLAGcec419f37 [2021-11-23 02:10:25,320 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/data/eee9c0152/ddf7d0ed256c494b9603a277ced59aeb [2021-11-23 02:10:25,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:10:25,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:10:25,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:25,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:10:25,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:10:25,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:25" (1/1) ... [2021-11-23 02:10:25,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192781c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:25, skipping insertion in model container [2021-11-23 02:10:25,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:25" (1/1) ... [2021-11-23 02:10:25,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:10:25,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:10:27,626 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_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-23 02:10:27,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:27,896 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:10:28,307 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_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-23 02:10:28,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:28,437 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:10:28,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28 WrapperNode [2021-11-23 02:10:28,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:28,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:28,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:10:28,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:10:28,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:28,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:28,796 INFO L137 Inliner]: procedures = 306, calls = 1743, calls flagged for inlining = 109, calls inlined = 100, statements flattened = 3797 [2021-11-23 02:10:28,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:28,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:10:28,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:10:28,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:10:28,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:28,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:28,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:28,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:28,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:29,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:29,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:29,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:10:29,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:10:29,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:10:29,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:10:29,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (1/1) ... [2021-11-23 02:10:29,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:29,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:29,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:10:29,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:10:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-23 02:10:29,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-23 02:10:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_memstick_host [2021-11-23 02:10:29,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_memstick_host [2021-11-23 02:10:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 02:10:29,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 02:10:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:10:29,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:10:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:10:29,190 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:10:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure msb_stop [2021-11-23 02:10:29,190 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_stop [2021-11-23 02:10:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure msb_get_zone_from_pba [2021-11-23 02:10:29,191 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_get_zone_from_pba [2021-11-23 02:10:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-23 02:10:29,191 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-23 02:10:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:10:29,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:10:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure blk_fetch_request [2021-11-23 02:10:29,192 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_fetch_request [2021-11-23 02:10:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 02:10:29,192 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 02:10:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-23 02:10:29,192 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-23 02:10:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:10:29,193 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:10:29,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:10:29,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:10:29,193 INFO L130 BoogieDeclarations]: Found specification of procedure msb_switch_to_parallel [2021-11-23 02:10:29,193 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_switch_to_parallel [2021-11-23 02:10:29,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:10:29,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:10:29,194 INFO L130 BoogieDeclarations]: Found specification of procedure msb_validate_used_block_bitmap [2021-11-23 02:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_validate_used_block_bitmap [2021-11-23 02:10:29,194 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:10:29,195 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure msb_verify_block [2021-11-23 02:10:29,195 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_verify_block [2021-11-23 02:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:10:29,196 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_2 [2021-11-23 02:10:29,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_2 [2021-11-23 02:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_msb_disk_lock [2021-11-23 02:10:29,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_msb_disk_lock [2021-11-23 02:10:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:10:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_write [2021-11-23 02:10:29,197 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_write [2021-11-23 02:10:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 02:10:29,199 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-23 02:10:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-23 02:10:29,199 INFO L130 BoogieDeclarations]: Found specification of procedure memstick_set_drvdata [2021-11-23 02:10:29,200 INFO L138 BoogieDeclarations]: Found implementation of procedure memstick_set_drvdata [2021-11-23 02:10:29,200 INFO L130 BoogieDeclarations]: Found specification of procedure __blk_end_request [2021-11-23 02:10:29,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __blk_end_request [2021-11-23 02:10:29,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:10:29,200 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-23 02:10:29,200 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-23 02:10:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure msb_invalidate_reg_window [2021-11-23 02:10:29,202 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_invalidate_reg_window [2021-11-23 02:10:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure msb_io_work [2021-11-23 02:10:29,202 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_io_work [2021-11-23 02:10:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:10:29,202 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:10:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_table [2021-11-23 02:10:29,203 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_table [2021-11-23 02:10:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:10:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure msb_erase_block [2021-11-23 02:10:29,203 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_erase_block [2021-11-23 02:10:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:10:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure memstick_get_drvdata [2021-11-23 02:10:29,204 INFO L138 BoogieDeclarations]: Found implementation of procedure memstick_get_drvdata [2021-11-23 02:10:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure msb_data_clear [2021-11-23 02:10:29,205 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_data_clear [2021-11-23 02:10:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:10:29,205 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:10:29,205 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 02:10:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 02:10:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:10:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:10:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 02:10:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 02:10:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:10:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:10:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure msb_read_bad_block_table [2021-11-23 02:10:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_read_bad_block_table [2021-11-23 02:10:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure msb_update_block [2021-11-23 02:10:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_update_block [2021-11-23 02:10:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_flush [2021-11-23 02:10:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_flush [2021-11-23 02:10:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_next [2021-11-23 02:10:29,210 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_next [2021-11-23 02:10:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-23 02:10:29,211 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-23 02:10:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_start [2021-11-23 02:10:29,211 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_start [2021-11-23 02:10:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure msb_run_state_machine [2021-11-23 02:10:29,211 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_run_state_machine [2021-11-23 02:10:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure msb_sg_copy [2021-11-23 02:10:29,212 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_sg_copy [2021-11-23 02:10:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-23 02:10:29,212 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-23 02:10:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:10:29,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:10:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure find_next_zero_bit [2021-11-23 02:10:29,213 INFO L138 BoogieDeclarations]: Found implementation of procedure find_next_zero_bit [2021-11-23 02:10:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_memstick_host [2021-11-23 02:10:29,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_memstick_host [2021-11-23 02:10:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:10:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-23 02:10:29,215 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-23 02:10:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure msb_get_zone_from_lba [2021-11-23 02:10:29,218 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_get_zone_from_lba [2021-11-23 02:10:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure msb_reset [2021-11-23 02:10:29,219 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_reset [2021-11-23 02:10:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_2 [2021-11-23 02:10:29,222 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_2 [2021-11-23 02:10:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure blk_start_queue [2021-11-23 02:10:29,222 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_start_queue [2021-11-23 02:10:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:10:29,229 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:10:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2021-11-23 02:10:29,229 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2021-11-23 02:10:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure msb_bd_getgeo [2021-11-23 02:10:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_bd_getgeo [2021-11-23 02:10:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:10:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure msb_remove [2021-11-23 02:10:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_remove [2021-11-23 02:10:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:10:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:10:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure sg_next [2021-11-23 02:10:29,231 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_next [2021-11-23 02:10:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure msb_mark_bad [2021-11-23 02:10:29,231 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_mark_bad [2021-11-23 02:10:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:10:29,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:10:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:10:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_2 [2021-11-23 02:10:29,232 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_2 [2021-11-23 02:10:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:10:29,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:10:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:10:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure sg_nents [2021-11-23 02:10:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_nents [2021-11-23 02:10:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:10:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure msb_read_page [2021-11-23 02:10:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_read_page [2021-11-23 02:10:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure __set_bit [2021-11-23 02:10:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_bit [2021-11-23 02:10:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_stop [2021-11-23 02:10:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_stop [2021-11-23 02:10:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure msb_set_overwrite_flag [2021-11-23 02:10:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_set_overwrite_flag [2021-11-23 02:10:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure blk_rq_bytes [2021-11-23 02:10:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_rq_bytes [2021-11-23 02:10:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-23 02:10:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-23 02:10:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure msb_disk_release [2021-11-23 02:10:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_disk_release [2021-11-23 02:10:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure msb_mark_block_used [2021-11-23 02:10:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_mark_block_used [2021-11-23 02:10:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_discard [2021-11-23 02:10:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_discard [2021-11-23 02:10:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:10:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:10:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure msb_start [2021-11-23 02:10:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_start [2021-11-23 02:10:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-23 02:10:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-23 02:10:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-23 02:10:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-23 02:10:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-23 02:10:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-23 02:10:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure msb_init_card [2021-11-23 02:10:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_init_card [2021-11-23 02:10:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2021-11-23 02:10:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2021-11-23 02:10:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:10:29,238 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:10:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:10:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_one [2021-11-23 02:10:29,238 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_one [2021-11-23 02:10:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-23 02:10:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-23 02:10:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_msb_disk_lock [2021-11-23 02:10:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_msb_disk_lock [2021-11-23 02:10:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:10:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:10:30,000 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:10:30,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:10:30,287 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:10:33,029 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:10:34,147 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:10:34,147 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:10:34,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:34 BoogieIcfgContainer [2021-11-23 02:10:34,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:10:34,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:10:34,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:10:34,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:10:34,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:10:25" (1/3) ... [2021-11-23 02:10:34,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f761ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:34, skipping insertion in model container [2021-11-23 02:10:34,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:28" (2/3) ... [2021-11-23 02:10:34,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f761ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:34, skipping insertion in model container [2021-11-23 02:10:34,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:34" (3/3) ... [2021-11-23 02:10:34,161 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-23 02:10:34,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:10:34,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:10:34,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:10:34,232 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:10:34,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:10:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 1151 states, 719 states have (on average 1.3532684283727399) internal successors, (973), 763 states have internal predecessors, (973), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (337), 331 states have call predecessors, (337), 337 states have call successors, (337) [2021-11-23 02:10:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:10:34,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:34,289 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:10:34,290 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -896570951, now seen corresponding path program 1 times [2021-11-23 02:10:34,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:34,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761270954] [2021-11-23 02:10:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:34,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:10:34,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761270954] [2021-11-23 02:10:34,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761270954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:34,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:34,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:34,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773921258] [2021-11-23 02:10:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:34,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:34,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:34,888 INFO L87 Difference]: Start difference. First operand has 1151 states, 719 states have (on average 1.3532684283727399) internal successors, (973), 763 states have internal predecessors, (973), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (337), 331 states have call predecessors, (337), 337 states have call successors, (337) 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-23 02:10:38,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:10:40,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:10:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:40,805 INFO L93 Difference]: Finished difference Result 3383 states and 4890 transitions. [2021-11-23 02:10:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:40,810 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 64 [2021-11-23 02:10:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:40,992 INFO L225 Difference]: With dead ends: 3383 [2021-11-23 02:10:40,992 INFO L226 Difference]: Without dead ends: 2206 [2021-11-23 02:10:41,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:41,028 INFO L933 BasicCegarLoop]: 1765 mSDtfsCounter, 1575 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:41,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1577 Valid, 3174 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:10:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-11-23 02:10:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 2187. [2021-11-23 02:10:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 1370 states have (on average 1.3313868613138686) internal successors, (1824), 1435 states have internal predecessors, (1824), 646 states have call successors, (646), 171 states have call predecessors, (646), 170 states have return successors, (639), 623 states have call predecessors, (639), 637 states have call successors, (639) [2021-11-23 02:10:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3109 transitions. [2021-11-23 02:10:41,406 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3109 transitions. Word has length 64 [2021-11-23 02:10:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:41,407 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3109 transitions. [2021-11-23 02:10:41,407 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-23 02:10:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3109 transitions. [2021-11-23 02:10:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:10:41,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:41,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:10:41,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:10:41,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash 232886649, now seen corresponding path program 1 times [2021-11-23 02:10:41,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:41,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473170725] [2021-11-23 02:10:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:41,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:10:41,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:41,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473170725] [2021-11-23 02:10:41,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473170725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:41,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:41,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:41,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956620287] [2021-11-23 02:10:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:41,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:41,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:41,692 INFO L87 Difference]: Start difference. First operand 2187 states and 3109 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:10:43,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:10:47,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:10:49,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:10:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:49,686 INFO L93 Difference]: Finished difference Result 6469 states and 9202 transitions. [2021-11-23 02:10:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2021-11-23 02:10:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:49,745 INFO L225 Difference]: With dead ends: 6469 [2021-11-23 02:10:49,746 INFO L226 Difference]: Without dead ends: 4297 [2021-11-23 02:10:49,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:49,773 INFO L933 BasicCegarLoop]: 1756 mSDtfsCounter, 1520 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:49,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 3139 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 427 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 02:10:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-11-23 02:10:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 4288. [2021-11-23 02:10:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 2693 states have (on average 1.3301151132565912) internal successors, (3582), 2811 states have internal predecessors, (3582), 1260 states have call successors, (1260), 335 states have call predecessors, (1260), 334 states have return successors, (1257), 1226 states have call predecessors, (1257), 1251 states have call successors, (1257) [2021-11-23 02:10:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 6099 transitions. [2021-11-23 02:10:50,144 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 6099 transitions. Word has length 67 [2021-11-23 02:10:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:50,148 INFO L470 AbstractCegarLoop]: Abstraction has 4288 states and 6099 transitions. [2021-11-23 02:10:50,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:10:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 6099 transitions. [2021-11-23 02:10:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:10:50,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:50,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:10:50,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:10:50,158 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1944821062, now seen corresponding path program 1 times [2021-11-23 02:10:50,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:50,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457909677] [2021-11-23 02:10:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:50,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:10:50,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:50,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457909677] [2021-11-23 02:10:50,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457909677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:50,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:50,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:50,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841504475] [2021-11-23 02:10:50,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:50,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:50,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:50,441 INFO L87 Difference]: Start difference. First operand 4288 states and 6099 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:10:53,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:10:55,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:10:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:56,455 INFO L93 Difference]: Finished difference Result 8543 states and 12151 transitions. [2021-11-23 02:10:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-11-23 02:10:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:56,532 INFO L225 Difference]: With dead ends: 8543 [2021-11-23 02:10:56,532 INFO L226 Difference]: Without dead ends: 8540 [2021-11-23 02:10:56,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:56,540 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 1557 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:56,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 3084 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 02:10:56,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2021-11-23 02:10:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8534. [2021-11-23 02:10:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 5366 states have (on average 1.3302273574357062) internal successors, (7138), 5593 states have internal predecessors, (7138), 2500 states have call successors, (2500), 668 states have call predecessors, (2500), 667 states have return successors, (2505), 2441 states have call predecessors, (2505), 2491 states have call successors, (2505) [2021-11-23 02:10:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 12143 transitions. [2021-11-23 02:10:57,046 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 12143 transitions. Word has length 68 [2021-11-23 02:10:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:57,046 INFO L470 AbstractCegarLoop]: Abstraction has 8534 states and 12143 transitions. [2021-11-23 02:10:57,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:10:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 12143 transitions. [2021-11-23 02:10:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:10:57,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:57,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:57,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:10:57,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash 159416656, now seen corresponding path program 1 times [2021-11-23 02:10:57,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:57,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737013403] [2021-11-23 02:10:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:57,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:10:57,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:57,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737013403] [2021-11-23 02:10:57,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737013403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:57,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:57,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:57,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464990968] [2021-11-23 02:10:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:57,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:57,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:57,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:57,229 INFO L87 Difference]: Start difference. First operand 8534 states and 12143 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:00,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:02,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:03,711 INFO L93 Difference]: Finished difference Result 8544 states and 12152 transitions. [2021-11-23 02:11:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:03,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2021-11-23 02:11:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:03,789 INFO L225 Difference]: With dead ends: 8544 [2021-11-23 02:11:03,790 INFO L226 Difference]: Without dead ends: 8541 [2021-11-23 02:11:03,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:03,802 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 1554 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 3087 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:03,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 3087 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:11:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2021-11-23 02:11:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 8535. [2021-11-23 02:11:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8535 states, 5367 states have (on average 1.330165828209428) internal successors, (7139), 5594 states have internal predecessors, (7139), 2500 states have call successors, (2500), 668 states have call predecessors, (2500), 667 states have return successors, (2505), 2441 states have call predecessors, (2505), 2491 states have call successors, (2505) [2021-11-23 02:11:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8535 states to 8535 states and 12144 transitions. [2021-11-23 02:11:04,319 INFO L78 Accepts]: Start accepts. Automaton has 8535 states and 12144 transitions. Word has length 69 [2021-11-23 02:11:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:04,322 INFO L470 AbstractCegarLoop]: Abstraction has 8535 states and 12144 transitions. [2021-11-23 02:11:04,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 8535 states and 12144 transitions. [2021-11-23 02:11:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:11:04,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:04,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:11:04,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:11:04,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:04,327 INFO L85 PathProgramCache]: Analyzing trace with hash 646459785, now seen corresponding path program 1 times [2021-11-23 02:11:04,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:04,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198916608] [2021-11-23 02:11:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:04,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:11:04,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:04,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198916608] [2021-11-23 02:11:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198916608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:04,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:04,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:04,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584597144] [2021-11-23 02:11:04,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:04,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:04,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:04,520 INFO L87 Difference]: Start difference. First operand 8535 states and 12144 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:07,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:10,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:10,683 INFO L93 Difference]: Finished difference Result 14405 states and 20337 transitions. [2021-11-23 02:11:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:10,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2021-11-23 02:11:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:10,783 INFO L225 Difference]: With dead ends: 14405 [2021-11-23 02:11:10,784 INFO L226 Difference]: Without dead ends: 14401 [2021-11-23 02:11:10,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:10,792 INFO L933 BasicCegarLoop]: 1924 mSDtfsCounter, 1478 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 3293 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:10,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 3293 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 02:11:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14401 states. [2021-11-23 02:11:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14401 to 14395. [2021-11-23 02:11:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14395 states, 9062 states have (on average 1.3263076583535642) internal successors, (12019), 9426 states have internal predecessors, (12019), 4140 states have call successors, (4140), 1197 states have call predecessors, (4140), 1192 states have return successors, (4161), 4040 states have call predecessors, (4161), 4131 states have call successors, (4161) [2021-11-23 02:11:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14395 states to 14395 states and 20320 transitions. [2021-11-23 02:11:11,621 INFO L78 Accepts]: Start accepts. Automaton has 14395 states and 20320 transitions. Word has length 70 [2021-11-23 02:11:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 14395 states and 20320 transitions. [2021-11-23 02:11:11,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 14395 states and 20320 transitions. [2021-11-23 02:11:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:11:11,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:11,626 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:11:11,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:11:11,626 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1435067533, now seen corresponding path program 1 times [2021-11-23 02:11:11,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:11,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083174353] [2021-11-23 02:11:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:11,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:11:11,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083174353] [2021-11-23 02:11:11,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083174353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:11,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:11,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:11,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093269330] [2021-11-23 02:11:11,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:11,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:11,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:11,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:11,758 INFO L87 Difference]: Start difference. First operand 14395 states and 20320 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:14,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:16,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:17,836 INFO L93 Difference]: Finished difference Result 22225 states and 31443 transitions. [2021-11-23 02:11:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-23 02:11:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:17,975 INFO L225 Difference]: With dead ends: 22225 [2021-11-23 02:11:17,976 INFO L226 Difference]: Without dead ends: 22221 [2021-11-23 02:11:17,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:17,993 INFO L933 BasicCegarLoop]: 1696 mSDtfsCounter, 1505 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:17,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 3032 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:11:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22221 states. [2021-11-23 02:11:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22221 to 22214. [2021-11-23 02:11:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22214 states, 14063 states have (on average 1.3300149328023891) internal successors, (18704), 14653 states have internal predecessors, (18704), 6340 states have call successors, (6340), 1839 states have call predecessors, (6340), 1810 states have return successors, (6377), 6142 states have call predecessors, (6377), 6331 states have call successors, (6377) [2021-11-23 02:11:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22214 states to 22214 states and 31421 transitions. [2021-11-23 02:11:19,234 INFO L78 Accepts]: Start accepts. Automaton has 22214 states and 31421 transitions. Word has length 71 [2021-11-23 02:11:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:19,235 INFO L470 AbstractCegarLoop]: Abstraction has 22214 states and 31421 transitions. [2021-11-23 02:11:19,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 22214 states and 31421 transitions. [2021-11-23 02:11:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:11:19,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:19,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:11:19,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:11:19,238 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1537900084, now seen corresponding path program 1 times [2021-11-23 02:11:19,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:19,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364868963] [2021-11-23 02:11:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:19,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:11:19,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:19,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364868963] [2021-11-23 02:11:19,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364868963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:19,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:19,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:19,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514053471] [2021-11-23 02:11:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:19,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:19,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:19,361 INFO L87 Difference]: Start difference. First operand 22214 states and 31421 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:22,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:24,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:26,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:27,223 INFO L93 Difference]: Finished difference Result 22224 states and 31429 transitions. [2021-11-23 02:11:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 72 [2021-11-23 02:11:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:27,353 INFO L225 Difference]: With dead ends: 22224 [2021-11-23 02:11:27,354 INFO L226 Difference]: Without dead ends: 22211 [2021-11-23 02:11:27,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:27,367 INFO L933 BasicCegarLoop]: 1716 mSDtfsCounter, 1541 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:27,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 3097 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 3 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 02:11:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22211 states. [2021-11-23 02:11:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22211 to 22207. [2021-11-23 02:11:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22207 states, 14058 states have (on average 1.3297766396357946) internal successors, (18694), 14648 states have internal predecessors, (18694), 6339 states have call successors, (6339), 1838 states have call predecessors, (6339), 1809 states have return successors, (6376), 6141 states have call predecessors, (6376), 6330 states have call successors, (6376) [2021-11-23 02:11:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22207 states to 22207 states and 31409 transitions. [2021-11-23 02:11:29,094 INFO L78 Accepts]: Start accepts. Automaton has 22207 states and 31409 transitions. Word has length 72 [2021-11-23 02:11:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:29,095 INFO L470 AbstractCegarLoop]: Abstraction has 22207 states and 31409 transitions. [2021-11-23 02:11:29,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 22207 states and 31409 transitions. [2021-11-23 02:11:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 02:11:29,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:29,104 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:11:29,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:11:29,104 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2106524904, now seen corresponding path program 1 times [2021-11-23 02:11:29,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:29,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915990428] [2021-11-23 02:11:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:29,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 02:11:29,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:29,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915990428] [2021-11-23 02:11:29,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915990428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:29,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:29,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:29,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420557247] [2021-11-23 02:11:29,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:29,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:29,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:29,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:29,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:29,403 INFO L87 Difference]: Start difference. First operand 22207 states and 31409 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:30,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:34,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:36,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:36,714 INFO L93 Difference]: Finished difference Result 22313 states and 31526 transitions. [2021-11-23 02:11:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 109 [2021-11-23 02:11:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:36,828 INFO L225 Difference]: With dead ends: 22313 [2021-11-23 02:11:36,828 INFO L226 Difference]: Without dead ends: 22310 [2021-11-23 02:11:36,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:36,840 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 57 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:36,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 2757 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-11-23 02:11:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22310 states. [2021-11-23 02:11:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22310 to 22310. [2021-11-23 02:11:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22310 states, 14110 states have (on average 1.3277108433734939) internal successors, (18734), 14699 states have internal predecessors, (18734), 6370 states have call successors, (6370), 1858 states have call predecessors, (6370), 1829 states have return successors, (6408), 6173 states have call predecessors, (6408), 6362 states have call successors, (6408) [2021-11-23 02:11:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22310 states to 22310 states and 31512 transitions. [2021-11-23 02:11:37,959 INFO L78 Accepts]: Start accepts. Automaton has 22310 states and 31512 transitions. Word has length 109 [2021-11-23 02:11:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:37,960 INFO L470 AbstractCegarLoop]: Abstraction has 22310 states and 31512 transitions. [2021-11-23 02:11:37,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 22310 states and 31512 transitions. [2021-11-23 02:11:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:11:37,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:37,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-23 02:11:37,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:11:37,973 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1056481041, now seen corresponding path program 1 times [2021-11-23 02:11:37,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:37,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376632179] [2021-11-23 02:11:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:37,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:11:38,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376632179] [2021-11-23 02:11:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376632179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:38,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:38,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935649647] [2021-11-23 02:11:38,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:38,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:38,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:38,231 INFO L87 Difference]: Start difference. First operand 22310 states and 31512 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:11:41,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:44,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:44,742 INFO L93 Difference]: Finished difference Result 57016 states and 80113 transitions. [2021-11-23 02:11:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 125 [2021-11-23 02:11:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:44,956 INFO L225 Difference]: With dead ends: 57016 [2021-11-23 02:11:44,956 INFO L226 Difference]: Without dead ends: 34721 [2021-11-23 02:11:45,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:45,097 INFO L933 BasicCegarLoop]: 1644 mSDtfsCounter, 944 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 3009 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:45,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 3009 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 440 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 02:11:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34721 states. [2021-11-23 02:11:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34721 to 34678. [2021-11-23 02:11:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34678 states, 22272 states have (on average 1.333423132183908) internal successors, (29698), 23131 states have internal predecessors, (29698), 9406 states have call successors, (9406), 3036 states have call predecessors, (9406), 2999 states have return successors, (9444), 9117 states have call predecessors, (9444), 9398 states have call successors, (9444) [2021-11-23 02:11:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34678 states to 34678 states and 48548 transitions. [2021-11-23 02:11:46,926 INFO L78 Accepts]: Start accepts. Automaton has 34678 states and 48548 transitions. Word has length 125 [2021-11-23 02:11:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:46,927 INFO L470 AbstractCegarLoop]: Abstraction has 34678 states and 48548 transitions. [2021-11-23 02:11:46,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:11:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 34678 states and 48548 transitions. [2021-11-23 02:11:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 02:11:46,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:46,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-23 02:11:46,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:11:46,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:46,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:46,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1908370995, now seen corresponding path program 1 times [2021-11-23 02:11:46,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:46,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553867592] [2021-11-23 02:11:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:46,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 02:11:47,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:47,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553867592] [2021-11-23 02:11:47,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553867592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:47,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:47,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:47,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246636140] [2021-11-23 02:11:47,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:47,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:47,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:47,147 INFO L87 Difference]: Start difference. First operand 34678 states and 48548 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-23 02:11:52,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:54,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:11:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:55,305 INFO L93 Difference]: Finished difference Result 83821 states and 117247 transitions. [2021-11-23 02:11:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 161 [2021-11-23 02:11:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:55,807 INFO L225 Difference]: With dead ends: 83821 [2021-11-23 02:11:55,807 INFO L226 Difference]: Without dead ends: 49166 [2021-11-23 02:11:55,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:55,920 INFO L933 BasicCegarLoop]: 2423 mSDtfsCounter, 1325 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 3746 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:55,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 3746 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 570 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:11:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49166 states. [2021-11-23 02:11:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49166 to 49121. [2021-11-23 02:11:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49121 states, 31828 states have (on average 1.3355536006032425) internal successors, (42508), 32994 states have internal predecessors, (42508), 12995 states have call successors, (12995), 4346 states have call predecessors, (12995), 4297 states have return successors, (13049), 12597 states have call predecessors, (13049), 12987 states have call successors, (13049) [2021-11-23 02:11:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49121 states to 49121 states and 68552 transitions. [2021-11-23 02:11:58,123 INFO L78 Accepts]: Start accepts. Automaton has 49121 states and 68552 transitions. Word has length 161 [2021-11-23 02:11:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:58,124 INFO L470 AbstractCegarLoop]: Abstraction has 49121 states and 68552 transitions. [2021-11-23 02:11:58,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-23 02:11:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 49121 states and 68552 transitions. [2021-11-23 02:11:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 02:11:58,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:58,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:58,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:11:58,183 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1486403432, now seen corresponding path program 1 times [2021-11-23 02:11:58,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:58,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408978206] [2021-11-23 02:11:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:58,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 02:11:58,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:58,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408978206] [2021-11-23 02:11:58,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408978206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:58,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:58,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:58,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538697204] [2021-11-23 02:11:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:58,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:58,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:58,351 INFO L87 Difference]: Start difference. First operand 49121 states and 68552 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:12:02,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:04,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:12:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:05,875 INFO L93 Difference]: Finished difference Result 51086 states and 70919 transitions. [2021-11-23 02:12:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 185 [2021-11-23 02:12:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:06,101 INFO L225 Difference]: With dead ends: 51086 [2021-11-23 02:12:06,101 INFO L226 Difference]: Without dead ends: 51083 [2021-11-23 02:12:06,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:06,130 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 666 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:06,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 3049 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-23 02:12:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51083 states. [2021-11-23 02:12:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51083 to 51083. [2021-11-23 02:12:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51083 states, 32998 states have (on average 1.3318382932298927) internal successors, (43948), 34197 states have internal predecessors, (43948), 13450 states have call successors, (13450), 4682 states have call predecessors, (13450), 4634 states have return successors, (13507), 13045 states have call predecessors, (13507), 13443 states have call successors, (13507) [2021-11-23 02:12:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51083 states to 51083 states and 70905 transitions. [2021-11-23 02:12:08,085 INFO L78 Accepts]: Start accepts. Automaton has 51083 states and 70905 transitions. Word has length 185 [2021-11-23 02:12:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 51083 states and 70905 transitions. [2021-11-23 02:12:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:12:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 51083 states and 70905 transitions. [2021-11-23 02:12:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-23 02:12:08,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:08,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:12:08,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:12:08,171 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash -749769586, now seen corresponding path program 1 times [2021-11-23 02:12:08,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:08,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437809200] [2021-11-23 02:12:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:08,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:08,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:12:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601637091] [2021-11-23 02:12:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:08,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:08,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:12:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:12:09,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-23 02:12:09,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:09,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437809200] [2021-11-23 02:12:09,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:12:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601637091] [2021-11-23 02:12:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601637091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:09,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:09,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:12:09,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579056962] [2021-11-23 02:12:09,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:12:09,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:12:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:09,709 INFO L87 Difference]: Start difference. First operand 51083 states and 70905 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:12:13,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:15,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:12:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:17,122 INFO L93 Difference]: Finished difference Result 126016 states and 174797 transitions. [2021-11-23 02:12:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:17,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 225 [2021-11-23 02:12:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:17,590 INFO L225 Difference]: With dead ends: 126016 [2021-11-23 02:12:17,590 INFO L226 Difference]: Without dead ends: 74956 [2021-11-23 02:12:17,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:17,711 INFO L933 BasicCegarLoop]: 1712 mSDtfsCounter, 1441 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:17,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 3067 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 420 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 02:12:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74956 states. [2021-11-23 02:12:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74956 to 74907. [2021-11-23 02:12:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74907 states, 48395 states have (on average 1.330963942556049) internal successors, (64412), 50133 states have internal predecessors, (64412), 19650 states have call successors, (19650), 6925 states have call predecessors, (19650), 6861 states have return successors, (19739), 19081 states have call predecessors, (19739), 19643 states have call successors, (19739) [2021-11-23 02:12:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74907 states to 74907 states and 103801 transitions. [2021-11-23 02:12:20,378 INFO L78 Accepts]: Start accepts. Automaton has 74907 states and 103801 transitions. Word has length 225 [2021-11-23 02:12:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:20,379 INFO L470 AbstractCegarLoop]: Abstraction has 74907 states and 103801 transitions. [2021-11-23 02:12:20,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:12:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 74907 states and 103801 transitions. [2021-11-23 02:12:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-23 02:12:20,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:20,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:12:20,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:21,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:21,013 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1216897152, now seen corresponding path program 1 times [2021-11-23 02:12:21,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:21,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699462664] [2021-11-23 02:12:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:21,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:21,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:12:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061380994] [2021-11-23 02:12:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:21,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:21,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:21,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:12:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:12:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:12:22,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:22,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:22,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699462664] [2021-11-23 02:12:22,232 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:12:22,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061380994] [2021-11-23 02:12:22,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061380994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:22,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:22,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:12:22,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522262154] [2021-11-23 02:12:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:22,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:12:22,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:12:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:12:22,235 INFO L87 Difference]: Start difference. First operand 74907 states and 103801 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:12:26,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:28,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:12:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:30,209 INFO L93 Difference]: Finished difference Result 149946 states and 207816 transitions. [2021-11-23 02:12:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:12:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 225 [2021-11-23 02:12:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:30,524 INFO L225 Difference]: With dead ends: 149946 [2021-11-23 02:12:30,524 INFO L226 Difference]: Without dead ends: 75035 [2021-11-23 02:12:30,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:30,918 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 26 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4193 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:30,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 4193 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 622 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:12:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75035 states. [2021-11-23 02:12:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75035 to 74919. [2021-11-23 02:12:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74919 states, 48407 states have (on average 1.3306959737228088) internal successors, (64415), 50145 states have internal predecessors, (64415), 19650 states have call successors, (19650), 6925 states have call predecessors, (19650), 6861 states have return successors, (19739), 19081 states have call predecessors, (19739), 19643 states have call successors, (19739) [2021-11-23 02:12:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74919 states to 74919 states and 103804 transitions. [2021-11-23 02:12:33,521 INFO L78 Accepts]: Start accepts. Automaton has 74919 states and 103804 transitions. Word has length 225 [2021-11-23 02:12:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:33,521 INFO L470 AbstractCegarLoop]: Abstraction has 74919 states and 103804 transitions. [2021-11-23 02:12:33,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:12:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 74919 states and 103804 transitions. [2021-11-23 02:12:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-23 02:12:33,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:33,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:12:33,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:12:33,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:12:33,799 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1217999091, now seen corresponding path program 1 times [2021-11-23 02:12:33,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:33,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643199482] [2021-11-23 02:12:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:33,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:33,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:12:33,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840100680] [2021-11-23 02:12:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:33,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:33,906 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:33,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:12:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:34,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:12:34,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-23 02:12:35,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:35,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643199482] [2021-11-23 02:12:35,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:12:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840100680] [2021-11-23 02:12:35,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840100680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:35,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:35,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:12:35,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199203147] [2021-11-23 02:12:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:35,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:12:35,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:35,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:12:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:35,369 INFO L87 Difference]: Start difference. First operand 74919 states and 103804 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 02:12:41,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:12:43,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:45,931 INFO L93 Difference]: Finished difference Result 157548 states and 220721 transitions. [2021-11-23 02:12:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:12:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) Word has length 227 [2021-11-23 02:12:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:46,357 INFO L225 Difference]: With dead ends: 157548 [2021-11-23 02:12:46,358 INFO L226 Difference]: Without dead ends: 82652 [2021-11-23 02:12:46,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:12:46,589 INFO L933 BasicCegarLoop]: 1619 mSDtfsCounter, 159 mSDsluCounter, 10791 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 11118 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:46,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 11118 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1581 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 02:12:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82652 states. [2021-11-23 02:12:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82652 to 75231. [2021-11-23 02:12:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75231 states, 48641 states have (on average 1.3291050759647212) internal successors, (64649), 50379 states have internal predecessors, (64649), 19650 states have call successors, (19650), 6925 states have call predecessors, (19650), 6939 states have return successors, (20083), 19159 states have call predecessors, (20083), 19643 states have call successors, (20083) [2021-11-23 02:12:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75231 states to 75231 states and 104382 transitions. [2021-11-23 02:12:50,020 INFO L78 Accepts]: Start accepts. Automaton has 75231 states and 104382 transitions. Word has length 227 [2021-11-23 02:12:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:50,021 INFO L470 AbstractCegarLoop]: Abstraction has 75231 states and 104382 transitions. [2021-11-23 02:12:50,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 02:12:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 75231 states and 104382 transitions. [2021-11-23 02:12:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-23 02:12:50,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:50,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:50,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 02:12:50,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b9348a-b6e0-4121-92c6-1fc9af5a6e87/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:12:50,299 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:50,299 INFO L85 PathProgramCache]: Analyzing trace with hash 382504243, now seen corresponding path program 1 times [2021-11-23 02:12:50,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:50,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977736439] [2021-11-23 02:12:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:50,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 02:12:50,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977736439] [2021-11-23 02:12:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977736439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:50,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:50,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:50,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235416593] [2021-11-23 02:12:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:50,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:50,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:50,492 INFO L87 Difference]: Start difference. First operand 75231 states and 104382 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:12:52,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:56,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:59,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:13:02,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []