./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--infiniband--ulp--isert--ib_isert.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_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/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_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--infiniband--ulp--isert--ib_isert.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/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_f239381b-c81d-4d85-98ea-ecfe5a5416e6/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 d57db9f03a5170fd6970a4ac4989029ee35a0e85ad6a1c5337395bb7ff185d1b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:47:03,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:47:03,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:47:03,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:47:03,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:47:03,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:47:03,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:47:03,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:47:03,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:47:03,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:47:03,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:47:03,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:47:03,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:47:03,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:47:03,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:47:03,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:47:03,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:47:03,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:47:03,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:47:03,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:47:03,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:47:03,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:47:03,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:47:03,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:47:03,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:47:03,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:47:03,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:47:03,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:47:03,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:47:03,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:47:03,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:47:03,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:47:03,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:47:03,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:47:03,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:47:03,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:47:03,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:47:03,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:47:03,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:47:03,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:47:03,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:47:03,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:47:03,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:47:03,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:47:03,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:47:03,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:47:03,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:47:03,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:47:03,601 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:47:03,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:47:03,601 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:47:03,601 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:47:03,602 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:47:03,603 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:47:03,603 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:47:03,603 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:47:03,603 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:47:03,604 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:47:03,604 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:47:03,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:47:03,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:47:03,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:47:03,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:47:03,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:47:03,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:47:03,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:47:03,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:47:03,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:47:03,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:47:03,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:47:03,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:47:03,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:03,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:47:03,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:47:03,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:47:03,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:47:03,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:47:03,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:47:03,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:47:03,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:47:03,610 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_f239381b-c81d-4d85-98ea-ecfe5a5416e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d57db9f03a5170fd6970a4ac4989029ee35a0e85ad6a1c5337395bb7ff185d1b [2021-11-23 03:47:03,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:47:03,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:47:03,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:47:03,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:47:03,938 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:47:03,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--infiniband--ulp--isert--ib_isert.ko-entry_point.cil.out.i [2021-11-23 03:47:04,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/data/b53d1db94/c8e500863b7d462db4438f9e81672b4a/FLAGf85469b8c [2021-11-23 03:47:05,049 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:47:05,050 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--infiniband--ulp--isert--ib_isert.ko-entry_point.cil.out.i [2021-11-23 03:47:05,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/data/b53d1db94/c8e500863b7d462db4438f9e81672b4a/FLAGf85469b8c [2021-11-23 03:47:05,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/data/b53d1db94/c8e500863b7d462db4438f9e81672b4a [2021-11-23 03:47:05,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:47:05,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:47:05,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:05,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:47:05,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:47:05,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:05" (1/1) ... [2021-11-23 03:47:05,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59decc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:05, skipping insertion in model container [2021-11-23 03:47:05,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:05" (1/1) ... [2021-11-23 03:47:05,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:47:05,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:09,600 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_f239381b-c81d-4d85-98ea-ecfe5a5416e6/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--infiniband--ulp--isert--ib_isert.ko-entry_point.cil.out.i[477998,478011] [2021-11-23 03:47:09,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:09,983 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:47:11,037 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_f239381b-c81d-4d85-98ea-ecfe5a5416e6/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--infiniband--ulp--isert--ib_isert.ko-entry_point.cil.out.i[477998,478011] [2021-11-23 03:47:11,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:11,235 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:47:11,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11 WrapperNode [2021-11-23 03:47:11,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:11,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:11,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:47:11,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:47:11,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:11,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:11,729 INFO L137 Inliner]: procedures = 483, calls = 2853, calls flagged for inlining = 237, calls inlined = 184, statements flattened = 6899 [2021-11-23 03:47:11,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:11,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:47:11,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:47:11,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:47:11,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:11,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:11,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:11,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:11,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:12,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:12,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:12,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:47:12,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:47:12,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:47:12,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:47:12,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (1/1) ... [2021-11-23 03:47:12,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:12,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:47:12,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:47:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure ib_wc_status_msg [2021-11-23 03:47:12,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_wc_status_msg [2021-11-23 03:47:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:47:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:47:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure isert_setup_id [2021-11-23 03:47:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_setup_id [2021-11-23 03:47:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:47:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:47:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_isert_conn [2021-11-23 03:47:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_isert_conn [2021-11-23 03:47:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 03:47:12,243 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 03:47:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure dump_stack [2021-11-23 03:47:12,243 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_stack [2021-11-23 03:47:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure iscsit_stop_dataout_timer [2021-11-23 03:47:12,243 INFO L138 BoogieDeclarations]: Found implementation of procedure iscsit_stop_dataout_timer [2021-11-23 03:47:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure rdma_destroy_id [2021-11-23 03:47:12,243 INFO L138 BoogieDeclarations]: Found implementation of procedure rdma_destroy_id [2021-11-23 03:47:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:47:12,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:47:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure isert_cq_work [2021-11-23 03:47:12,244 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_cq_work [2021-11-23 03:47:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 03:47:12,244 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 03:47:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure ib_post_recv [2021-11-23 03:47:12,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_post_recv [2021-11-23 03:47:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dma_sync_single_for_device [2021-11-23 03:47:12,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dma_sync_single_for_device [2021-11-23 03:47:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:47:12,245 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:47:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_isert_conn [2021-11-23 03:47:12,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_isert_conn [2021-11-23 03:47:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dma_unmap_single [2021-11-23 03:47:12,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dma_unmap_single [2021-11-23 03:47:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure isert_init_send_wr [2021-11-23 03:47:12,246 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_init_send_wr [2021-11-23 03:47:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_np_accept_mutex_of_isert_np [2021-11-23 03:47:12,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_np_accept_mutex_of_isert_np [2021-11-23 03:47:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:47:12,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:47:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:47:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:47:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_np_accept_mutex_of_isert_np [2021-11-23 03:47:12,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_np_accept_mutex_of_isert_np [2021-11-23 03:47:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:47:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure ib_sg_dma_address [2021-11-23 03:47:12,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_sg_dma_address [2021-11-23 03:47:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure isert_wait_conn [2021-11-23 03:47:12,248 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_wait_conn [2021-11-23 03:47:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u64~0~X~int~X~int~TO~VOID [2021-11-23 03:47:12,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u64~0~X~int~X~int~TO~VOID [2021-11-23 03:47:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 03:47:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 03:47:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-23 03:47:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-23 03:47:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dma_map_single [2021-11-23 03:47:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dma_map_single [2021-11-23 03:47:12,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:47:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure isert_conn_terminate [2021-11-23 03:47:12,251 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_conn_terminate [2021-11-23 03:47:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 03:47:12,252 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 03:47:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:47:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure isert_prot_cmd [2021-11-23 03:47:12,252 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_prot_cmd [2021-11-23 03:47:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:47:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 03:47:12,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 03:47:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion_interruptible [2021-11-23 03:47:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion_interruptible [2021-11-23 03:47:12,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:47:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:47:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure isert_release_work [2021-11-23 03:47:12,254 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_release_work [2021-11-23 03:47:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure isert_free_np [2021-11-23 03:47:12,254 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_free_np [2021-11-23 03:47:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure isert_comp_put [2021-11-23 03:47:12,254 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_comp_put [2021-11-23 03:47:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-23 03:47:12,255 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-23 03:47:12,255 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 03:47:12,255 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 03:47:12,255 INFO L130 BoogieDeclarations]: Found specification of procedure sg_next [2021-11-23 03:47:12,255 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_next [2021-11-23 03:47:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure sg_copy_from_buffer [2021-11-23 03:47:12,256 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_copy_from_buffer [2021-11-23 03:47:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:47:12,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:47:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:47:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2021-11-23 03:47:12,257 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2021-11-23 03:47:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:47:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-23 03:47:12,258 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-23 03:47:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:47:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:47:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:47:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:47:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure isert_completion_put [2021-11-23 03:47:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_completion_put [2021-11-23 03:47:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 03:47:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 03:47:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure isert_unmap_data_buf [2021-11-23 03:47:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_unmap_data_buf [2021-11-23 03:47:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure isert_inv_rkey [2021-11-23 03:47:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_inv_rkey [2021-11-23 03:47:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 03:47:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 03:47:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dma_sync_single_for_cpu [2021-11-23 03:47:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dma_sync_single_for_cpu [2021-11-23 03:47:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 03:47:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 03:47:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure isert_allocate_cmd [2021-11-23 03:47:12,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_allocate_cmd [2021-11-23 03:47:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure isert_do_control_comp [2021-11-23 03:47:12,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_do_control_comp [2021-11-23 03:47:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure isert_put_conn [2021-11-23 03:47:12,267 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_put_conn [2021-11-23 03:47:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure isert_connect_release [2021-11-23 03:47:12,267 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_connect_release [2021-11-23 03:47:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure isert_free_comps [2021-11-23 03:47:12,273 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_free_comps [2021-11-23 03:47:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:47:12,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:47:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-23 03:47:12,274 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-23 03:47:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:47:12,274 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:47:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-23 03:47:12,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-23 03:47:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 03:47:12,275 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 03:47:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:47:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:47:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure isert_device_put [2021-11-23 03:47:12,275 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_device_put [2021-11-23 03:47:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:47:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:47:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure isert_map_data_buf [2021-11-23 03:47:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_map_data_buf [2021-11-23 03:47:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 03:47:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 03:47:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure isert_free_conn [2021-11-23 03:47:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_free_conn [2021-11-23 03:47:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure ib_post_send [2021-11-23 03:47:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_post_send [2021-11-23 03:47:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure isert_init_tx_hdrs [2021-11-23 03:47:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_init_tx_hdrs [2021-11-23 03:47:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-23 03:47:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-23 03:47:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-23 03:47:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-23 03:47:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure ib_free_fast_reg_page_list [2021-11-23 03:47:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_free_fast_reg_page_list [2021-11-23 03:47:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-23 03:47:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-23 03:47:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:47:12,278 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:47:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure isert_aborted_task [2021-11-23 03:47:12,278 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_aborted_task [2021-11-23 03:47:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:47:12,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:47:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2021-11-23 03:47:12,278 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2021-11-23 03:47:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure isert_put_response [2021-11-23 03:47:12,278 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_put_response [2021-11-23 03:47:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure isert_wait4flush [2021-11-23 03:47:12,279 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_wait4flush [2021-11-23 03:47:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:47:12,279 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:47:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:47:12,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:47:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:47:12,279 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:47:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure isert_free_login_buf [2021-11-23 03:47:12,279 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_free_login_buf [2021-11-23 03:47:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-23 03:47:12,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-23 03:47:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-23 03:47:12,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-23 03:47:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:47:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:47:12,280 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:47:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure iscsit_priv_cmd [2021-11-23 03:47:12,280 INFO L138 BoogieDeclarations]: Found implementation of procedure iscsit_priv_cmd [2021-11-23 03:47:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure isert_put_nopin [2021-11-23 03:47:12,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_put_nopin [2021-11-23 03:47:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:47:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-23 03:47:12,281 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-23 03:47:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure isert_reg_rdma [2021-11-23 03:47:12,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_reg_rdma [2021-11-23 03:47:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:47:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure isert_post_recv [2021-11-23 03:47:12,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_post_recv [2021-11-23 03:47:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 03:47:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 03:47:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:47:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:47:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 03:47:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 03:47:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 03:47:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 03:47:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:47:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:47:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure isert_rdma_post_recvl [2021-11-23 03:47:12,283 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_rdma_post_recvl [2021-11-23 03:47:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure isert_conn_free_fastreg_pool [2021-11-23 03:47:12,283 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_conn_free_fastreg_pool [2021-11-23 03:47:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure transport_send_check_condition_and_sense [2021-11-23 03:47:12,284 INFO L138 BoogieDeclarations]: Found implementation of procedure transport_send_check_condition_and_sense [2021-11-23 03:47:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 03:47:12,284 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 03:47:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure isert_reg_sig_mr [2021-11-23 03:47:12,284 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_reg_sig_mr [2021-11-23 03:47:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure transport_generic_free_cmd [2021-11-23 03:47:12,284 INFO L138 BoogieDeclarations]: Found implementation of procedure transport_generic_free_cmd [2021-11-23 03:47:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure isert_unmap_tx_desc [2021-11-23 03:47:12,284 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_unmap_tx_desc [2021-11-23 03:47:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 03:47:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 03:47:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_device_list_mutex [2021-11-23 03:47:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_device_list_mutex [2021-11-23 03:47:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_device_list_mutex [2021-11-23 03:47:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_device_list_mutex [2021-11-23 03:47:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_weight [2021-11-23 03:47:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_weight [2021-11-23 03:47:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure isert_handle_prot_cmd [2021-11-23 03:47:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_handle_prot_cmd [2021-11-23 03:47:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dereg_mr [2021-11-23 03:47:12,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dereg_mr [2021-11-23 03:47:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure ib_req_notify_cq [2021-11-23 03:47:12,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_req_notify_cq [2021-11-23 03:47:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:47:12,286 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:47:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure isert_check_pi_status [2021-11-23 03:47:12,286 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_check_pi_status [2021-11-23 03:47:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2021-11-23 03:47:12,287 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2021-11-23 03:47:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:47:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure isert_create_send_desc [2021-11-23 03:47:12,291 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_create_send_desc [2021-11-23 03:47:12,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:47:12,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:47:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure ib_sg_dma_len [2021-11-23 03:47:12,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_sg_dma_len [2021-11-23 03:47:12,292 INFO L130 BoogieDeclarations]: Found specification of procedure isert_fast_reg_mr [2021-11-23 03:47:12,292 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_fast_reg_mr [2021-11-23 03:47:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:47:12,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:47:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab64 [2021-11-23 03:47:12,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab64 [2021-11-23 03:47:12,293 INFO L130 BoogieDeclarations]: Found specification of procedure isert_post_response [2021-11-23 03:47:12,294 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_post_response [2021-11-23 03:47:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure ib_alloc_fast_reg_mr [2021-11-23 03:47:12,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_alloc_fast_reg_mr [2021-11-23 03:47:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 03:47:12,294 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 03:47:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure isert_rx_login_req [2021-11-23 03:47:12,294 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_rx_login_req [2021-11-23 03:47:12,294 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-23 03:47:12,294 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-23 03:47:12,295 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dma_mapping_error [2021-11-23 03:47:12,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dma_mapping_error [2021-11-23 03:47:12,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:47:12,295 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 03:47:12,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 03:47:12,295 INFO L130 BoogieDeclarations]: Found specification of procedure target_put_sess_cmd [2021-11-23 03:47:12,295 INFO L138 BoogieDeclarations]: Found implementation of procedure target_put_sess_cmd [2021-11-23 03:47:12,295 INFO L130 BoogieDeclarations]: Found specification of procedure isert_set_dif_domain [2021-11-23 03:47:12,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isert_set_dif_domain [2021-11-23 03:47:12,295 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-23 03:47:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-23 03:47:12,296 INFO L130 BoogieDeclarations]: Found specification of procedure ib_dealloc_pd [2021-11-23 03:47:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_dealloc_pd [2021-11-23 03:47:12,296 INFO L130 BoogieDeclarations]: Found specification of procedure ib_alloc_fast_reg_page_list [2021-11-23 03:47:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ib_alloc_fast_reg_page_list [2021-11-23 03:47:12,296 INFO L130 BoogieDeclarations]: Found specification of procedure iscsit_build_rsp_pdu [2021-11-23 03:47:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure iscsit_build_rsp_pdu [2021-11-23 03:47:13,516 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:47:13,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:47:13,721 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:47:24,084 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:47:25,983 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:47:25,983 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:47:25,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:25 BoogieIcfgContainer [2021-11-23 03:47:25,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:47:25,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:47:25,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:47:25,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:47:25,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:47:05" (1/3) ... [2021-11-23 03:47:25,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ad017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:25, skipping insertion in model container [2021-11-23 03:47:25,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:11" (2/3) ... [2021-11-23 03:47:25,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ad017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:25, skipping insertion in model container [2021-11-23 03:47:25,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:25" (3/3) ... [2021-11-23 03:47:25,999 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--infiniband--ulp--isert--ib_isert.ko-entry_point.cil.out.i [2021-11-23 03:47:26,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:47:26,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:47:26,082 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:47:26,098 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:47:26,098 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:47:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 1807 states, 1085 states have (on average 1.3105990783410137) internal successors, (1422), 1145 states have internal predecessors, (1422), 590 states have call successors, (590), 131 states have call predecessors, (590), 130 states have return successors, (584), 573 states have call predecessors, (584), 584 states have call successors, (584) [2021-11-23 03:47:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 03:47:26,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:26,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:26,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 509387961, now seen corresponding path program 1 times [2021-11-23 03:47:26,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251696212] [2021-11-23 03:47:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:26,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:47:27,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251696212] [2021-11-23 03:47:27,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251696212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:27,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:27,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:27,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733901339] [2021-11-23 03:47:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:27,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:27,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:27,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:27,194 INFO L87 Difference]: Start difference. First operand has 1807 states, 1085 states have (on average 1.3105990783410137) internal successors, (1422), 1145 states have internal predecessors, (1422), 590 states have call successors, (590), 131 states have call predecessors, (590), 130 states have return successors, (584), 573 states have call predecessors, (584), 584 states have call successors, (584) 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 03:47:28,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:30,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:32,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:33,495 INFO L93 Difference]: Finished difference Result 3608 states and 5230 transitions. [2021-11-23 03:47:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:33,498 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 65 [2021-11-23 03:47:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:33,532 INFO L225 Difference]: With dead ends: 3608 [2021-11-23 03:47:33,533 INFO L226 Difference]: Without dead ends: 1797 [2021-11-23 03:47:33,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:33,565 INFO L933 BasicCegarLoop]: 2267 mSDtfsCounter, 2509 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:33,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 2305 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 03:47:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-11-23 03:47:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1795. [2021-11-23 03:47:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1078 states have (on average 1.2940630797773656) internal successors, (1395), 1128 states have internal predecessors, (1395), 582 states have call successors, (582), 135 states have call predecessors, (582), 134 states have return successors, (572), 561 states have call predecessors, (572), 572 states have call successors, (572) [2021-11-23 03:47:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2549 transitions. [2021-11-23 03:47:33,816 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2549 transitions. Word has length 65 [2021-11-23 03:47:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:33,817 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 2549 transitions. [2021-11-23 03:47:33,818 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 03:47:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2549 transitions. [2021-11-23 03:47:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 03:47:33,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:33,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:33,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:47:33,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1389816972, now seen corresponding path program 1 times [2021-11-23 03:47:33,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246653127] [2021-11-23 03:47:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:33,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:47:34,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:34,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246653127] [2021-11-23 03:47:34,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246653127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:34,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:34,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:34,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780146824] [2021-11-23 03:47:34,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:34,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:34,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:34,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:34,284 INFO L87 Difference]: Start difference. First operand 1795 states and 2549 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 03:47:36,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:39,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:41,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:43,476 WARN L534 Checker$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 03:47:44,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:46,938 INFO L93 Difference]: Finished difference Result 2747 states and 3858 transitions. [2021-11-23 03:47:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:46,938 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 66 [2021-11-23 03:47:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:46,968 INFO L225 Difference]: With dead ends: 2747 [2021-11-23 03:47:46,968 INFO L226 Difference]: Without dead ends: 2744 [2021-11-23 03:47:46,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:46,973 INFO L933 BasicCegarLoop]: 2540 mSDtfsCounter, 2505 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2514 SdHoareTripleChecker+Valid, 3653 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:46,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2514 Valid, 3653 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2021-11-23 03:47:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-11-23 03:47:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2733. [2021-11-23 03:47:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 1641 states have (on average 1.2845825716026813) internal successors, (2108), 1714 states have internal predecessors, (2108), 869 states have call successors, (869), 223 states have call predecessors, (869), 222 states have return successors, (860), 843 states have call predecessors, (860), 860 states have call successors, (860) [2021-11-23 03:47:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3837 transitions. [2021-11-23 03:47:47,185 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3837 transitions. Word has length 66 [2021-11-23 03:47:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:47,186 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 3837 transitions. [2021-11-23 03:47:47,186 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 03:47:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3837 transitions. [2021-11-23 03:47:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:47:47,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:47,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:47,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:47:47,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash -135622884, now seen corresponding path program 1 times [2021-11-23 03:47:47,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236217817] [2021-11-23 03:47:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:47,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:47:47,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236217817] [2021-11-23 03:47:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236217817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:47,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:47,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:47,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454612949] [2021-11-23 03:47:47,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:47,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:47,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:47,450 INFO L87 Difference]: Start difference. First operand 2733 states and 3837 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 03:47:49,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:53,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:55,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:56,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:58,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:00,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:01,485 INFO L93 Difference]: Finished difference Result 2746 states and 3856 transitions. [2021-11-23 03:48:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:01,486 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 67 [2021-11-23 03:48:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:01,509 INFO L225 Difference]: With dead ends: 2746 [2021-11-23 03:48:01,509 INFO L226 Difference]: Without dead ends: 2743 [2021-11-23 03:48:01,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:01,513 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 2502 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:01,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 3651 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 03:48:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-11-23 03:48:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2732. [2021-11-23 03:48:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 1641 states have (on average 1.2839731870810482) internal successors, (2107), 1713 states have internal predecessors, (2107), 868 states have call successors, (868), 223 states have call predecessors, (868), 222 states have return successors, (860), 843 states have call predecessors, (860), 860 states have call successors, (860) [2021-11-23 03:48:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3835 transitions. [2021-11-23 03:48:01,782 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3835 transitions. Word has length 67 [2021-11-23 03:48:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3835 transitions. [2021-11-23 03:48:01,783 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 03:48:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3835 transitions. [2021-11-23 03:48:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 03:48:01,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:01,787 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:48:01,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 984461906, now seen corresponding path program 1 times [2021-11-23 03:48:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177345264] [2021-11-23 03:48:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:01,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:48:01,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177345264] [2021-11-23 03:48:01,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177345264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:01,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:01,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:01,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645795105] [2021-11-23 03:48:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:01,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:01,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:01,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:01,988 INFO L87 Difference]: Start difference. First operand 2732 states and 3835 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 03:48:04,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:06,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:09,036 WARN L534 Checker$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 03:48:11,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:13,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:16,079 INFO L93 Difference]: Finished difference Result 6801 states and 9530 transitions. [2021-11-23 03:48:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:16,080 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), 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 69 [2021-11-23 03:48:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:16,120 INFO L225 Difference]: With dead ends: 6801 [2021-11-23 03:48:16,120 INFO L226 Difference]: Without dead ends: 4084 [2021-11-23 03:48:16,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:16,146 INFO L933 BasicCegarLoop]: 2690 mSDtfsCounter, 1854 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1867 SdHoareTripleChecker+Valid, 4878 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:16,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1867 Valid, 4878 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 668 Invalid, 5 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 03:48:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2021-11-23 03:48:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 4064. [2021-11-23 03:48:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4064 states, 2445 states have (on average 1.2858895705521471) internal successors, (3144), 2558 states have internal predecessors, (3144), 1272 states have call successors, (1272), 347 states have call predecessors, (1272), 346 states have return successors, (1277), 1233 states have call predecessors, (1277), 1264 states have call successors, (1277) [2021-11-23 03:48:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 5693 transitions. [2021-11-23 03:48:16,415 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 5693 transitions. Word has length 69 [2021-11-23 03:48:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:16,419 INFO L470 AbstractCegarLoop]: Abstraction has 4064 states and 5693 transitions. [2021-11-23 03:48:16,419 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), 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 03:48:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 5693 transitions. [2021-11-23 03:48:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:48:16,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:16,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:16,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:48:16,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash 89693047, now seen corresponding path program 1 times [2021-11-23 03:48:16,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:16,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431567241] [2021-11-23 03:48:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:16,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:48:16,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431567241] [2021-11-23 03:48:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431567241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:16,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:16,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:16,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291322829] [2021-11-23 03:48:16,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:16,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:16,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:16,671 INFO L87 Difference]: Start difference. First operand 4064 states and 5693 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 03:48:19,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:21,801 WARN L534 Checker$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 03:48:24,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:25,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:27,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:31,408 WARN L534 Checker$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 03:48:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:31,667 INFO L93 Difference]: Finished difference Result 5001 states and 6982 transitions. [2021-11-23 03:48:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:31,668 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 68 [2021-11-23 03:48:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:31,711 INFO L225 Difference]: With dead ends: 5001 [2021-11-23 03:48:31,711 INFO L226 Difference]: Without dead ends: 4998 [2021-11-23 03:48:31,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:31,717 INFO L933 BasicCegarLoop]: 2565 mSDtfsCounter, 2475 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 3678 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:31,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2486 Valid, 3678 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 5 Unknown, 0 Unchecked, 14.8s Time] [2021-11-23 03:48:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2021-11-23 03:48:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4992. [2021-11-23 03:48:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 3002 states have (on average 1.282145236508994) internal successors, (3849), 3139 states have internal predecessors, (3849), 1554 states have call successors, (1554), 435 states have call predecessors, (1554), 435 states have return successors, (1571), 1509 states have call predecessors, (1571), 1547 states have call successors, (1571) [2021-11-23 03:48:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 6974 transitions. [2021-11-23 03:48:32,067 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 6974 transitions. Word has length 68 [2021-11-23 03:48:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:32,068 INFO L470 AbstractCegarLoop]: Abstraction has 4992 states and 6974 transitions. [2021-11-23 03:48:32,068 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 03:48:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 6974 transitions. [2021-11-23 03:48:32,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 03:48:32,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:32,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:32,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:48:32,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1998644962, now seen corresponding path program 1 times [2021-11-23 03:48:32,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:32,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488054948] [2021-11-23 03:48:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:32,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:48:32,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:32,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488054948] [2021-11-23 03:48:32,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488054948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:32,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:32,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:32,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645608669] [2021-11-23 03:48:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:32,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:32,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:32,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:32,414 INFO L87 Difference]: Start difference. First operand 4992 states and 6974 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, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:48:34,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:36,813 WARN L534 Checker$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 03:48:41,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:43,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:45,609 INFO L93 Difference]: Finished difference Result 9534 states and 13454 transitions. [2021-11-23 03:48:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:45,618 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, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 75 [2021-11-23 03:48:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:45,708 INFO L225 Difference]: With dead ends: 9534 [2021-11-23 03:48:45,708 INFO L226 Difference]: Without dead ends: 9530 [2021-11-23 03:48:45,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:45,716 INFO L933 BasicCegarLoop]: 2937 mSDtfsCounter, 2440 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2444 SdHoareTripleChecker+Valid, 5132 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:45,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2444 Valid, 5132 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 641 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2021-11-23 03:48:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9530 states. [2021-11-23 03:48:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9530 to 9524. [2021-11-23 03:48:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 5751 states have (on average 1.2848200312989044) internal successors, (7389), 6012 states have internal predecessors, (7389), 2941 states have call successors, (2941), 830 states have call predecessors, (2941), 831 states have return successors, (3111), 2860 states have call predecessors, (3111), 2934 states have call successors, (3111) [2021-11-23 03:48:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 13441 transitions. [2021-11-23 03:48:46,356 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 13441 transitions. Word has length 75 [2021-11-23 03:48:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:46,357 INFO L470 AbstractCegarLoop]: Abstraction has 9524 states and 13441 transitions. [2021-11-23 03:48:46,357 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, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:48:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 13441 transitions. [2021-11-23 03:48:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:48:46,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:46,360 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:46,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:48:46,361 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 264957818, now seen corresponding path program 1 times [2021-11-23 03:48:46,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:46,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450156539] [2021-11-23 03:48:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:46,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:48:46,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450156539] [2021-11-23 03:48:46,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450156539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:46,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:46,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:46,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551205157] [2021-11-23 03:48:46,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:46,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:46,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:46,587 INFO L87 Difference]: Start difference. First operand 9524 states and 13441 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 03:48:48,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:51,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:53,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:56,168 WARN L534 Checker$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 03:48:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:56,784 INFO L93 Difference]: Finished difference Result 12525 states and 17364 transitions. [2021-11-23 03:48:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 03:48:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:56,876 INFO L225 Difference]: With dead ends: 12525 [2021-11-23 03:48:56,876 INFO L226 Difference]: Without dead ends: 12509 [2021-11-23 03:48:56,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:56,890 INFO L933 BasicCegarLoop]: 2377 mSDtfsCounter, 2418 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2425 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:56,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2425 Valid, 2959 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 4 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 03:48:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12509 states. [2021-11-23 03:48:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12509 to 12494. [2021-11-23 03:48:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12494 states, 7492 states have (on average 1.2693539775760811) internal successors, (9510), 7817 states have internal predecessors, (9510), 3804 states have call successors, (3804), 1196 states have call predecessors, (3804), 1197 states have return successors, (4009), 3692 states have call predecessors, (4009), 3799 states have call successors, (4009) [2021-11-23 03:48:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12494 states to 12494 states and 17323 transitions. [2021-11-23 03:48:57,835 INFO L78 Accepts]: Start accepts. Automaton has 12494 states and 17323 transitions. Word has length 70 [2021-11-23 03:48:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:57,837 INFO L470 AbstractCegarLoop]: Abstraction has 12494 states and 17323 transitions. [2021-11-23 03:48:57,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 03:48:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 12494 states and 17323 transitions. [2021-11-23 03:48:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:48:57,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:57,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:57,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:48:57,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:57,849 INFO L85 PathProgramCache]: Analyzing trace with hash 88082067, now seen corresponding path program 1 times [2021-11-23 03:48:57,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:57,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141057690] [2021-11-23 03:48:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:57,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:48:58,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141057690] [2021-11-23 03:48:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141057690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:58,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:58,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881988548] [2021-11-23 03:48:58,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:58,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:58,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:58,034 INFO L87 Difference]: Start difference. First operand 12494 states and 17323 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:49:00,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:02,434 WARN L534 Checker$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 03:49:06,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:08,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:11,398 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 03:49:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:49:11,930 INFO L93 Difference]: Finished difference Result 12508 states and 17330 transitions. [2021-11-23 03:49:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:49:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 85 [2021-11-23 03:49:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:49:12,006 INFO L225 Difference]: With dead ends: 12508 [2021-11-23 03:49:12,007 INFO L226 Difference]: Without dead ends: 12505 [2021-11-23 03:49:12,019 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 03:49:12,020 INFO L933 BasicCegarLoop]: 2221 mSDtfsCounter, 49 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4393 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:49:12,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 4393 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 613 Invalid, 3 Unknown, 0 Unchecked, 13.6s Time] [2021-11-23 03:49:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12505 states. [2021-11-23 03:49:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12505 to 12505. [2021-11-23 03:49:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12505 states, 7498 states have (on average 1.2686049613230195) internal successors, (9512), 7822 states have internal predecessors, (9512), 3803 states have call successors, (3803), 1202 states have call predecessors, (3803), 1203 states have return successors, (4009), 3692 states have call predecessors, (4009), 3799 states have call successors, (4009) [2021-11-23 03:49:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12505 states to 12505 states and 17324 transitions. [2021-11-23 03:49:13,047 INFO L78 Accepts]: Start accepts. Automaton has 12505 states and 17324 transitions. Word has length 85 [2021-11-23 03:49:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:49:13,047 INFO L470 AbstractCegarLoop]: Abstraction has 12505 states and 17324 transitions. [2021-11-23 03:49:13,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:49:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 12505 states and 17324 transitions. [2021-11-23 03:49:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 03:49:13,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:49:13,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 03:49:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:49:13,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:49:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:49:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2087967521, now seen corresponding path program 1 times [2021-11-23 03:49:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:49:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439602218] [2021-11-23 03:49:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:13,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:49:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 03:49:13,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:49:13,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439602218] [2021-11-23 03:49:13,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439602218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:49:13,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:49:13,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:49:13,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683429982] [2021-11-23 03:49:13,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:49:13,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:49:13,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:49:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:49:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:49:13,553 INFO L87 Difference]: Start difference. First operand 12505 states and 17324 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 03:49:15,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:17,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:21,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:23,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:25,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:49:26,667 INFO L93 Difference]: Finished difference Result 12558 states and 17357 transitions. [2021-11-23 03:49:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:49:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 136 [2021-11-23 03:49:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:49:26,739 INFO L225 Difference]: With dead ends: 12558 [2021-11-23 03:49:26,739 INFO L226 Difference]: Without dead ends: 12555 [2021-11-23 03:49:26,750 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 03:49:26,751 INFO L933 BasicCegarLoop]: 2364 mSDtfsCounter, 222 mSDsluCounter, 2484 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 4547 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:49:26,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 4547 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 635 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2021-11-23 03:49:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12555 states. [2021-11-23 03:49:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12555 to 12552. [2021-11-23 03:49:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12552 states, 7522 states have (on average 1.2673491092794469) internal successors, (9533), 7845 states have internal predecessors, (9533), 3805 states have call successors, (3805), 1223 states have call predecessors, (3805), 1224 states have return successors, (4012), 3695 states have call predecessors, (4012), 3802 states have call successors, (4012) [2021-11-23 03:49:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12552 states to 12552 states and 17350 transitions. [2021-11-23 03:49:27,593 INFO L78 Accepts]: Start accepts. Automaton has 12552 states and 17350 transitions. Word has length 136 [2021-11-23 03:49:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:49:27,594 INFO L470 AbstractCegarLoop]: Abstraction has 12552 states and 17350 transitions. [2021-11-23 03:49:27,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 03:49:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12552 states and 17350 transitions. [2021-11-23 03:49:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 03:49:27,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:49:27,618 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 03:49:27,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:49:27,619 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:49:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:49:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1373769535, now seen corresponding path program 1 times [2021-11-23 03:49:27,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:49:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915471199] [2021-11-23 03:49:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:27,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:49:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-23 03:49:27,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:49:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915471199] [2021-11-23 03:49:27,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915471199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:49:27,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:49:27,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:49:27,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668475218] [2021-11-23 03:49:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:49:27,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:49:27,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:49:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:49:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:49:27,858 INFO L87 Difference]: Start difference. First operand 12552 states and 17350 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, (31), 3 states have call predecessors, (31), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 03:49:29,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:32,179 WARN L534 Checker$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 03:49:35,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:37,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:38,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:40,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:49:42,010 INFO L93 Difference]: Finished difference Result 12554 states and 17351 transitions. [2021-11-23 03:49:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:49:42,011 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, (31), 3 states have call predecessors, (31), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 153 [2021-11-23 03:49:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:49:42,070 INFO L225 Difference]: With dead ends: 12554 [2021-11-23 03:49:42,070 INFO L226 Difference]: Without dead ends: 12551 [2021-11-23 03:49:42,076 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 03:49:42,077 INFO L933 BasicCegarLoop]: 2217 mSDtfsCounter, 42 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4396 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:49:42,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 4396 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 615 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2021-11-23 03:49:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12551 states. [2021-11-23 03:49:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12551 to 12551. [2021-11-23 03:49:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12551 states, 7522 states have (on average 1.2665514490826908) internal successors, (9527), 7844 states have internal predecessors, (9527), 3804 states have call successors, (3804), 1223 states have call predecessors, (3804), 1224 states have return successors, (4012), 3695 states have call predecessors, (4012), 3802 states have call successors, (4012) [2021-11-23 03:49:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12551 states to 12551 states and 17343 transitions. [2021-11-23 03:49:42,812 INFO L78 Accepts]: Start accepts. Automaton has 12551 states and 17343 transitions. Word has length 153 [2021-11-23 03:49:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:49:42,815 INFO L470 AbstractCegarLoop]: Abstraction has 12551 states and 17343 transitions. [2021-11-23 03:49:42,815 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, (31), 3 states have call predecessors, (31), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 03:49:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12551 states and 17343 transitions. [2021-11-23 03:49:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 03:49:42,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:49:42,850 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 03:49:42,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:49:42,850 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:49:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:49:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -10108978, now seen corresponding path program 1 times [2021-11-23 03:49:42,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:49:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920012977] [2021-11-23 03:49:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:42,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:49:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:49:43,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:49:43,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920012977] [2021-11-23 03:49:43,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920012977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:49:43,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:49:43,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:49:43,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353632865] [2021-11-23 03:49:43,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:49:43,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:49:43,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:49:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:49:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:49:43,271 INFO L87 Difference]: Start difference. First operand 12551 states and 17343 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:49:45,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:51,686 WARN L534 Checker$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 03:49:57,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:04,034 WARN L534 Checker$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 03:50:06,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:09,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:11,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:13,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:15,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:19,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:21,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:27,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:32,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:35,861 WARN L534 Checker$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 03:50:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:43,038 INFO L93 Difference]: Finished difference Result 40635 states and 57165 transitions. [2021-11-23 03:50:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:50:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 170 [2021-11-23 03:50:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:43,185 INFO L225 Difference]: With dead ends: 40635 [2021-11-23 03:50:43,186 INFO L226 Difference]: Without dead ends: 28099 [2021-11-23 03:50:43,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:50:43,292 INFO L933 BasicCegarLoop]: 3389 mSDtfsCounter, 3779 mSDsluCounter, 5053 mSDsCounter, 0 mSdLazyCounter, 12512 mSolverCounterSat, 3215 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4361 SdHoareTripleChecker+Valid, 7630 SdHoareTripleChecker+Invalid, 15737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3215 IncrementalHoareTripleChecker+Valid, 12512 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:43,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4361 Valid, 7630 Invalid, 15737 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3215 Valid, 12512 Invalid, 10 Unknown, 0 Unchecked, 58.2s Time] [2021-11-23 03:50:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28099 states. [2021-11-23 03:50:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28099 to 27902. [2021-11-23 03:50:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27902 states, 16849 states have (on average 1.2796605139770907) internal successors, (21561), 17652 states have internal predecessors, (21561), 8448 states have call successors, (8448), 2491 states have call predecessors, (8448), 2604 states have return successors, (9472), 8251 states have call predecessors, (9472), 8446 states have call successors, (9472) [2021-11-23 03:50:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27902 states to 27902 states and 39481 transitions. [2021-11-23 03:50:45,447 INFO L78 Accepts]: Start accepts. Automaton has 27902 states and 39481 transitions. Word has length 170 [2021-11-23 03:50:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:45,448 INFO L470 AbstractCegarLoop]: Abstraction has 27902 states and 39481 transitions. [2021-11-23 03:50:45,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:50:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 27902 states and 39481 transitions. [2021-11-23 03:50:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 03:50:45,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:45,652 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:45,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:50:45,653 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash -233988829, now seen corresponding path program 1 times [2021-11-23 03:50:45,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:45,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018320758] [2021-11-23 03:50:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:45,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 03:50:45,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018320758] [2021-11-23 03:50:45,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018320758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:45,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:45,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:50:45,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657076885] [2021-11-23 03:50:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:45,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:45,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:45,970 INFO L87 Difference]: Start difference. First operand 27902 states and 39481 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-23 03:50:54,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:59,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:01,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:03,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:08,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:10,563 WARN L534 Checker$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 03:51:12,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:14,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:18,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:22,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:26,874 INFO L93 Difference]: Finished difference Result 64154 states and 91220 transitions. [2021-11-23 03:51:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:51:26,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 180 [2021-11-23 03:51:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:27,075 INFO L225 Difference]: With dead ends: 64154 [2021-11-23 03:51:27,082 INFO L226 Difference]: Without dead ends: 36255 [2021-11-23 03:51:27,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:51:27,449 INFO L933 BasicCegarLoop]: 2233 mSDtfsCounter, 3131 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 8644 mSolverCounterSat, 2392 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3642 SdHoareTripleChecker+Valid, 5103 SdHoareTripleChecker+Invalid, 11044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2392 IncrementalHoareTripleChecker+Valid, 8644 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:27,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3642 Valid, 5103 Invalid, 11044 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2392 Valid, 8644 Invalid, 8 Unknown, 0 Unchecked, 39.1s Time] [2021-11-23 03:51:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36255 states. [2021-11-23 03:51:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36255 to 35981. [2021-11-23 03:51:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35981 states, 21676 states have (on average 1.2765731684812696) internal successors, (27671), 22709 states have internal predecessors, (27671), 10887 states have call successors, (10887), 3259 states have call predecessors, (10887), 3417 states have return successors, (12451), 10652 states have call predecessors, (12451), 10881 states have call successors, (12451) [2021-11-23 03:51:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 51009 transitions. [2021-11-23 03:51:31,122 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 51009 transitions. Word has length 180 [2021-11-23 03:51:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:31,123 INFO L470 AbstractCegarLoop]: Abstraction has 35981 states and 51009 transitions. [2021-11-23 03:51:31,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 4 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-23 03:51:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 51009 transitions. [2021-11-23 03:51:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 03:51:31,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:31,177 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 03:51:31,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:51:31,178 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1948820560, now seen corresponding path program 1 times [2021-11-23 03:51:31,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481270487] [2021-11-23 03:51:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:31,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:51:31,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:31,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481270487] [2021-11-23 03:51:31,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481270487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:31,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:31,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:51:31,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690220936] [2021-11-23 03:51:31,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:31,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:51:31,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:51:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:51:31,578 INFO L87 Difference]: Start difference. First operand 35981 states and 51009 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:51:32,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:34,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:36,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:38,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:46,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:51,975 WARN L534 Checker$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 03:51:54,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:56,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:00,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:02,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:04,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:11,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:13,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:15,424 WARN L534 Checker$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 03:52:20,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:23,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:26,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:29,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:33,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:42,299 INFO L93 Difference]: Finished difference Result 114984 states and 162845 transitions. [2021-11-23 03:52:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:52:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 173 [2021-11-23 03:52:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:42,857 INFO L225 Difference]: With dead ends: 114984 [2021-11-23 03:52:42,858 INFO L226 Difference]: Without dead ends: 79018 [2021-11-23 03:52:43,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:52:43,060 INFO L933 BasicCegarLoop]: 3399 mSDtfsCounter, 3804 mSDsluCounter, 4985 mSDsCounter, 0 mSdLazyCounter, 12577 mSolverCounterSat, 3223 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 7599 SdHoareTripleChecker+Invalid, 15811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3223 IncrementalHoareTripleChecker+Valid, 12577 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:43,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 7599 Invalid, 15811 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3223 Valid, 12577 Invalid, 11 Unknown, 0 Unchecked, 67.0s Time] [2021-11-23 03:52:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79018 states. [2021-11-23 03:52:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79018 to 78659. [2021-11-23 03:52:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78659 states, 47372 states have (on average 1.273853753271975) internal successors, (60345), 49599 states have internal predecessors, (60345), 23725 states have call successors, (23725), 7291 states have call predecessors, (23725), 7561 states have return successors, (26973), 23116 states have call predecessors, (26973), 23715 states have call successors, (26973) [2021-11-23 03:52:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78659 states to 78659 states and 111043 transitions. [2021-11-23 03:52:48,155 INFO L78 Accepts]: Start accepts. Automaton has 78659 states and 111043 transitions. Word has length 173 [2021-11-23 03:52:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:48,155 INFO L470 AbstractCegarLoop]: Abstraction has 78659 states and 111043 transitions. [2021-11-23 03:52:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:52:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 78659 states and 111043 transitions. [2021-11-23 03:52:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-23 03:52:48,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:48,225 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 03:52:48,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:52:48,225 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1776131860, now seen corresponding path program 1 times [2021-11-23 03:52:48,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215687947] [2021-11-23 03:52:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:48,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:52:48,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:48,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215687947] [2021-11-23 03:52:48,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215687947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:48,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:48,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:52:48,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510566992] [2021-11-23 03:52:48,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:48,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:52:48,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:52:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:52:48,499 INFO L87 Difference]: Start difference. First operand 78659 states and 111043 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:52:50,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:58,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:01,198 WARN L534 Checker$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 03:53:03,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:11,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:15,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:20,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:23,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:24,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:27,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:29,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:38,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:40,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:51,344 INFO L93 Difference]: Finished difference Result 289052 states and 411107 transitions. [2021-11-23 03:53:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:53:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 172 [2021-11-23 03:53:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:52,835 INFO L225 Difference]: With dead ends: 289052 [2021-11-23 03:53:52,836 INFO L226 Difference]: Without dead ends: 210408 [2021-11-23 03:53:53,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:53:53,304 INFO L933 BasicCegarLoop]: 3437 mSDtfsCounter, 3786 mSDsluCounter, 5101 mSDsCounter, 0 mSdLazyCounter, 12693 mSolverCounterSat, 3225 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 7716 SdHoareTripleChecker+Invalid, 15927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3225 IncrementalHoareTripleChecker+Valid, 12693 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:53,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4379 Valid, 7716 Invalid, 15927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3225 Valid, 12693 Invalid, 9 Unknown, 0 Unchecked, 52.4s Time] [2021-11-23 03:53:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210408 states. [2021-11-23 03:54:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210408 to 209435. [2021-11-23 03:54:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209435 states, 126103 states have (on average 1.2733479774470076) internal successors, (160573), 132117 states have internal predecessors, (160573), 63086 states have call successors, (63086), 19590 states have call predecessors, (63086), 20245 states have return successors, (73949), 61312 states have call predecessors, (73949), 63066 states have call successors, (73949) [2021-11-23 03:54:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209435 states to 209435 states and 297608 transitions. [2021-11-23 03:54:08,031 INFO L78 Accepts]: Start accepts. Automaton has 209435 states and 297608 transitions. Word has length 172 [2021-11-23 03:54:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:08,031 INFO L470 AbstractCegarLoop]: Abstraction has 209435 states and 297608 transitions. [2021-11-23 03:54:08,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 4 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:54:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 209435 states and 297608 transitions. [2021-11-23 03:54:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 03:54:08,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:08,186 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 03:54:08,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:54:08,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 232648421, now seen corresponding path program 1 times [2021-11-23 03:54:08,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:08,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606124318] [2021-11-23 03:54:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:08,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-23 03:54:08,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606124318] [2021-11-23 03:54:08,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606124318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:08,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606165111] [2021-11-23 03:54:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:08,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:08,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:08,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f239381b-c81d-4d85-98ea-ecfe5a5416e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:54:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 3319 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:54:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-23 03:54:10,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-23 03:54:11,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606165111] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:11,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:54:11,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2021-11-23 03:54:11,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568339864] [2021-11-23 03:54:11,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:11,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:11,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:54:11,150 INFO L87 Difference]: Start difference. First operand 209435 states and 297608 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-23 03:54:13,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []