./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7 --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 83231938a54e9ae94bbb1bd48018cfe01091365ca5db88cfd1292dc620f78e56 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:39:12,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:39:12,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:39:12,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:39:12,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:39:12,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:39:12,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:39:12,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:39:12,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:39:12,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:39:12,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:39:12,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:39:12,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:39:12,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:39:12,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:39:12,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:39:12,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:39:12,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:39:12,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:39:12,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:39:12,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:39:12,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:39:12,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:39:12,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:39:12,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:39:12,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:39:12,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:39:12,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:39:12,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:39:12,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:39:12,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:39:12,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:39:12,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:39:12,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:39:12,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:39:12,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:39:12,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:39:12,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:39:12,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:39:12,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:39:12,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:39:12,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:39:12,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:39:12,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:39:12,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:39:12,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:39:12,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:39:12,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:39:12,513 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:39:12,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:39:12,513 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:39:12,513 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:39:12,513 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:39:12,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:39:12,514 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:39:12,514 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:39:12,514 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:39:12,515 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:39:12,515 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:39:12,515 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:39:12,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:39:12,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:39:12,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:39:12,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:39:12,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:39:12,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:39:12,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:39:12,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:39:12,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:39:12,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:39:12,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:39:12,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:39:12,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:39:12,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:39:12,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:39:12,520 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:39:12,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:39:12,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:39:12,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:39:12,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:39:12,521 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_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83231938a54e9ae94bbb1bd48018cfe01091365ca5db88cfd1292dc620f78e56 [2021-11-25 20:39:12,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:39:12,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:39:12,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:39:12,857 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:39:12,864 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:39:12,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-25 20:39:12,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/data/43e917fc9/f05f458d9e2b450e84ac71aceef9ef02/FLAG36debda03 [2021-11-25 20:39:14,127 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:39:14,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-25 20:39:14,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/data/43e917fc9/f05f458d9e2b450e84ac71aceef9ef02/FLAG36debda03 [2021-11-25 20:39:14,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/data/43e917fc9/f05f458d9e2b450e84ac71aceef9ef02 [2021-11-25 20:39:14,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:39:14,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:39:14,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:39:14,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:39:14,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:39:14,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:39:14" (1/1) ... [2021-11-25 20:39:14,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7cb63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:14, skipping insertion in model container [2021-11-25 20:39:14,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:39:14" (1/1) ... [2021-11-25 20:39:14,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:39:14,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:39:17,226 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_69cf1821-b9df-46cb-8a52-109c267cccf2/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[419026,419039] [2021-11-25 20:39:17,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:39:17,461 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:39:18,180 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_69cf1821-b9df-46cb-8a52-109c267cccf2/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[419026,419039] [2021-11-25 20:39:18,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:39:18,422 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:39:18,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18 WrapperNode [2021-11-25 20:39:18,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:39:18,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:39:18,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:39:18,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:39:18,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:18,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,326 INFO L137 Inliner]: procedures = 170, calls = 6771, calls flagged for inlining = 68, calls inlined = 55, statements flattened = 16522 [2021-11-25 20:39:19,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:39:19,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:39:19,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:39:19,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:39:19,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:19,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:20,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:39:20,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:39:20,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:39:20,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:39:20,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (1/1) ... [2021-11-25 20:39:20,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:39:20,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:39:20,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:39:20,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69cf1821-b9df-46cb-8a52-109c267cccf2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:39:20,256 INFO L130 BoogieDeclarations]: Found specification of procedure find_dev [2021-11-25 20:39:20,271 INFO L138 BoogieDeclarations]: Found implementation of procedure find_dev [2021-11-25 20:39:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_vitclk_ctl [2021-11-25 20:39:20,272 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_vitclk_ctl [2021-11-25 20:39:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:39:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 20:39:20,272 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 20:39:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_burst [2021-11-25 20:39:20,273 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_burst [2021-11-25 20:39:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_i2c_gate_ctrl [2021-11-25 20:39:20,273 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_i2c_gate_ctrl [2021-11-25 20:39:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:39:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:39:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_srate [2021-11-25 20:39:20,274 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_srate [2021-11-25 20:39:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:39:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_per [2021-11-25 20:39:20,275 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_per [2021-11-25 20:39:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_demod_lock_of_stv090x_internal [2021-11-25 20:39:20,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_demod_lock_of_stv090x_internal [2021-11-25 20:39:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod [2021-11-25 20:39:20,275 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod [2021-11-25 20:39:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_dvbs_track_crl [2021-11-25 20:39:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_dvbs_track_crl [2021-11-25 20:39:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:39:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:39:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_viterbi [2021-11-25 20:39:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_viterbi [2021-11-25 20:39:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_signal_strength [2021-11-25 20:39:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_signal_strength [2021-11-25 20:39:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:39:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 20:39:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 20:39:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_msg [2021-11-25 20:39:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_msg [2021-11-25 20:39:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 20:39:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 20:39:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thacq [2021-11-25 20:39:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thacq [2021-11-25 20:39:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_car_width [2021-11-25 20:39:20,279 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_car_width [2021-11-25 20:39:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_recv_slave_reply [2021-11-25 20:39:20,279 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_recv_slave_reply [2021-11-25 20:39:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2021-11-25 20:39:20,279 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2021-11-25 20:39:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:39:20,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:39:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-25 20:39:20,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-25 20:39:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_init [2021-11-25 20:39:20,280 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_init [2021-11-25 20:39:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_demod_lock_of_stv090x_internal [2021-11-25 20:39:20,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_demod_lock_of_stv090x_internal [2021-11-25 20:39:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-25 20:39:20,281 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-25 20:39:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-25 20:39:20,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-25 20:39:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_dmdlock [2021-11-25 20:39:20,282 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_dmdlock [2021-11-25 20:39:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:39:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:39:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:39:20,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_tuner_lock_of_stv090x_internal [2021-11-25 20:39:20,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_tuner_lock_of_stv090x_internal [2021-11-25 20:39:20,283 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_sleep [2021-11-25 20:39:20,283 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_sleep [2021-11-25 20:39:20,283 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_reg [2021-11-25 20:39:20,283 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_reg [2021-11-25 20:39:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_signal [2021-11-25 20:39:20,284 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_signal [2021-11-25 20:39:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:39:20,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:39:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:39:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure comp2 [2021-11-25 20:39:20,285 INFO L138 BoogieDeclarations]: Found implementation of procedure comp2 [2021-11-25 20:39:20,285 INFO L130 BoogieDeclarations]: Found specification of procedure remove_dev [2021-11-25 20:39:20,285 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_dev [2021-11-25 20:39:20,285 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_search [2021-11-25 20:39:20,285 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_search [2021-11-25 20:39:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_write_reg [2021-11-25 20:39:20,286 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_write_reg [2021-11-25 20:39:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_frontend_algo [2021-11-25 20:39:20,286 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_frontend_algo [2021-11-25 20:39:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:39:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:39:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_status [2021-11-25 20:39:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_status [2021-11-25 20:39:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thtracq [2021-11-25 20:39:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thtracq [2021-11-25 20:39:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_tmg [2021-11-25 20:39:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_tmg [2021-11-25 20:39:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_cnr [2021-11-25 20:39:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_cnr [2021-11-25 20:39:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 20:39:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 20:39:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_srate [2021-11-25 20:39:20,289 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_srate [2021-11-25 20:39:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod_single [2021-11-25 20:39:20,289 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod_single [2021-11-25 20:39:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:39:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-25 20:39:20,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-25 20:39:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_viterbi [2021-11-25 20:39:20,290 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_viterbi [2021-11-25 20:39:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:39:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_mclk [2021-11-25 20:39:20,290 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_mclk [2021-11-25 20:39:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:39:20,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:39:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_lock_tmg [2021-11-25 20:39:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_lock_tmg [2021-11-25 20:39:21,786 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:39:21,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:39:39,101 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:39:49,267 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:39:49,267 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:39:49,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:39:49 BoogieIcfgContainer [2021-11-25 20:39:49,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:39:49,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:39:49,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:39:49,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:39:49,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:39:14" (1/3) ... [2021-11-25 20:39:49,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac73104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:39:49, skipping insertion in model container [2021-11-25 20:39:49,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:18" (2/3) ... [2021-11-25 20:39:49,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac73104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:39:49, skipping insertion in model container [2021-11-25 20:39:49,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:39:49" (3/3) ... [2021-11-25 20:39:49,293 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-25 20:39:49,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:39:49,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:39:49,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:39:49,397 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 [2021-11-25 20:39:49,398 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:39:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 4209 states, 2866 states have (on average 1.4410327983251918) internal successors, (4130), 2878 states have internal predecessors, (4130), 1293 states have call successors, (1293), 48 states have call predecessors, (1293), 48 states have return successors, (1293), 1292 states have call predecessors, (1293), 1293 states have call successors, (1293) [2021-11-25 20:39:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:39:49,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:49,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:39:49,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:39:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1078225845, now seen corresponding path program 1 times [2021-11-25 20:39:49,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:39:49,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143999932] [2021-11-25 20:39:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:49,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:39:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:50,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:39:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143999932] [2021-11-25 20:39:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143999932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:50,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:50,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:39:50,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282926641] [2021-11-25 20:39:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:50,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:39:50,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:39:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:39:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:50,553 INFO L87 Difference]: Start difference. First operand has 4209 states, 2866 states have (on average 1.4410327983251918) internal successors, (4130), 2878 states have internal predecessors, (4130), 1293 states have call successors, (1293), 48 states have call predecessors, (1293), 48 states have return successors, (1293), 1292 states have call predecessors, (1293), 1293 states have call successors, (1293) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:54,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:39:56,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:39:59,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:40:03,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:03,961 INFO L93 Difference]: Finished difference Result 11965 states and 19204 transitions. [2021-11-25 20:40:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:40:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:40:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:04,065 INFO L225 Difference]: With dead ends: 11965 [2021-11-25 20:40:04,065 INFO L226 Difference]: Without dead ends: 7755 [2021-11-25 20:40:04,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:04,307 INFO L933 BasicCegarLoop]: 7575 mSDtfsCounter, 6155 mSDsluCounter, 6199 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6155 SdHoareTripleChecker+Valid, 13546 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:04,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6155 Valid, 13546 Invalid, 485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 477 Invalid, 4 Unknown, 0 Unchecked, 12.7s Time] [2021-11-25 20:40:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7755 states. [2021-11-25 20:40:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7755 to 7751. [2021-11-25 20:40:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 5292 states have (on average 1.4404761904761905) internal successors, (7623), 5307 states have internal predecessors, (7623), 2366 states have call successors, (2366), 94 states have call predecessors, (2366), 92 states have return successors, (2378), 2353 states have call predecessors, (2378), 2358 states have call successors, (2378) [2021-11-25 20:40:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 12367 transitions. [2021-11-25 20:40:06,357 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 12367 transitions. Word has length 6 [2021-11-25 20:40:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:06,358 INFO L470 AbstractCegarLoop]: Abstraction has 7751 states and 12367 transitions. [2021-11-25 20:40:06,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 12367 transitions. [2021-11-25 20:40:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:40:06,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:06,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:06,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:40:06,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:40:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash -937236781, now seen corresponding path program 1 times [2021-11-25 20:40:06,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:06,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34956303] [2021-11-25 20:40:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:06,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:06,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34956303] [2021-11-25 20:40:06,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34956303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:06,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:06,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:40:06,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789541374] [2021-11-25 20:40:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:06,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:40:06,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:06,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:40:06,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:06,852 INFO L87 Difference]: Start difference. First operand 7751 states and 12367 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:08,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:11,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:40:14,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:15,518 INFO L93 Difference]: Finished difference Result 9674 states and 15382 transitions. [2021-11-25 20:40:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:40:15,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:40:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:15,627 INFO L225 Difference]: With dead ends: 9674 [2021-11-25 20:40:15,627 INFO L226 Difference]: Without dead ends: 9671 [2021-11-25 20:40:15,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:15,640 INFO L933 BasicCegarLoop]: 7060 mSDtfsCounter, 6425 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6427 SdHoareTripleChecker+Valid, 10210 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:15,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6427 Valid, 10210 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 373 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2021-11-25 20:40:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-11-25 20:40:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 9658. [2021-11-25 20:40:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9658 states, 6600 states have (on average 1.436060606060606) internal successors, (9478), 6619 states have internal predecessors, (9478), 2936 states have call successors, (2936), 123 states have call predecessors, (2936), 121 states have return successors, (2949), 2920 states have call predecessors, (2949), 2929 states have call successors, (2949) [2021-11-25 20:40:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9658 states to 9658 states and 15363 transitions. [2021-11-25 20:40:17,868 INFO L78 Accepts]: Start accepts. Automaton has 9658 states and 15363 transitions. Word has length 7 [2021-11-25 20:40:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:17,868 INFO L470 AbstractCegarLoop]: Abstraction has 9658 states and 15363 transitions. [2021-11-25 20:40:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 9658 states and 15363 transitions. [2021-11-25 20:40:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:40:17,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:17,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:17,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:40:17,871 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:40:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1007936120, now seen corresponding path program 1 times [2021-11-25 20:40:17,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884511688] [2021-11-25 20:40:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:17,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:18,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884511688] [2021-11-25 20:40:18,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884511688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:18,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:18,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:40:18,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113684963] [2021-11-25 20:40:18,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:18,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:40:18,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:40:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:18,310 INFO L87 Difference]: Start difference. First operand 9658 states and 15363 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:20,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:22,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:40:25,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:27,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:28,354 INFO L93 Difference]: Finished difference Result 16823 states and 26707 transitions. [2021-11-25 20:40:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:40:28,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 20:40:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:28,519 INFO L225 Difference]: With dead ends: 16823 [2021-11-25 20:40:28,520 INFO L226 Difference]: Without dead ends: 16820 [2021-11-25 20:40:28,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:28,537 INFO L933 BasicCegarLoop]: 7396 mSDtfsCounter, 6623 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6625 SdHoareTripleChecker+Valid, 12268 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:28,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6625 Valid, 12268 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2021-11-25 20:40:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-11-25 20:40:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 16795. [2021-11-25 20:40:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16795 states, 11501 states have (on average 1.435266498565342) internal successors, (16507), 11533 states have internal predecessors, (16507), 5074 states have call successors, (5074), 220 states have call predecessors, (5074), 219 states have return successors, (5091), 5049 states have call predecessors, (5091), 5068 states have call successors, (5091) [2021-11-25 20:40:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16795 states to 16795 states and 26672 transitions. [2021-11-25 20:40:31,897 INFO L78 Accepts]: Start accepts. Automaton has 16795 states and 26672 transitions. Word has length 8 [2021-11-25 20:40:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:31,897 INFO L470 AbstractCegarLoop]: Abstraction has 16795 states and 26672 transitions. [2021-11-25 20:40:31,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 16795 states and 26672 transitions. [2021-11-25 20:40:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:40:31,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:31,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:40:31,899 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:40:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1178758774, now seen corresponding path program 1 times [2021-11-25 20:40:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039316472] [2021-11-25 20:40:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:31,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:32,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:32,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039316472] [2021-11-25 20:40:32,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039316472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:32,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:32,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:40:32,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117875380] [2021-11-25 20:40:32,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:32,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:40:32,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:40:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:32,507 INFO L87 Difference]: Start difference. First operand 16795 states and 26672 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:34,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:36,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:38,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:40:40,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:40:43,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:40:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:44,894 INFO L93 Difference]: Finished difference Result 49888 states and 79759 transitions. [2021-11-25 20:40:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:40:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 20:40:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:45,112 INFO L225 Difference]: With dead ends: 49888 [2021-11-25 20:40:45,113 INFO L226 Difference]: Without dead ends: 33090 [2021-11-25 20:40:45,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:40:45,334 INFO L933 BasicCegarLoop]: 7802 mSDtfsCounter, 6380 mSDsluCounter, 6722 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6380 SdHoareTripleChecker+Valid, 14287 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:45,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6380 Valid, 14287 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 489 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2021-11-25 20:40:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33090 states. [2021-11-25 20:40:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33090 to 33064. [2021-11-25 20:40:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33064 states, 22649 states have (on average 1.4355600688772132) internal successors, (32514), 22707 states have internal predecessors, (32514), 9990 states have call successors, (9990), 426 states have call predecessors, (9990), 424 states have return successors, (10340), 9946 states have call predecessors, (10340), 9982 states have call successors, (10340) [2021-11-25 20:40:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33064 states to 33064 states and 52844 transitions. [2021-11-25 20:40:52,554 INFO L78 Accepts]: Start accepts. Automaton has 33064 states and 52844 transitions. Word has length 9 [2021-11-25 20:40:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:52,555 INFO L470 AbstractCegarLoop]: Abstraction has 33064 states and 52844 transitions. [2021-11-25 20:40:52,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 33064 states and 52844 transitions. [2021-11-25 20:40:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:40:52,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:52,578 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:40:52,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:40:52,579 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:40:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1558093789, now seen corresponding path program 1 times [2021-11-25 20:40:52,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140899432] [2021-11-25 20:40:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:52,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:40:53,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:53,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140899432] [2021-11-25 20:40:53,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140899432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:53,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:53,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:40:53,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651247806] [2021-11-25 20:40:53,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:53,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:40:53,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:40:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:40:53,545 INFO L87 Difference]: Start difference. First operand 33064 states and 52844 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:40:56,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:57,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:59,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:01,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:06,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:41:08,023 INFO L93 Difference]: Finished difference Result 66513 states and 106573 transitions. [2021-11-25 20:41:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:41:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-11-25 20:41:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:41:08,339 INFO L225 Difference]: With dead ends: 66513 [2021-11-25 20:41:08,339 INFO L226 Difference]: Without dead ends: 33450 [2021-11-25 20:41:08,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:41:08,834 INFO L933 BasicCegarLoop]: 6454 mSDtfsCounter, 61 mSDsluCounter, 13339 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 19311 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:41:08,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 19311 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 789 Invalid, 2 Unknown, 0 Unchecked, 12.9s Time] [2021-11-25 20:41:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33450 states. [2021-11-25 20:41:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33450 to 33448. [2021-11-25 20:41:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33448 states, 22931 states have (on average 1.4330818542584274) internal successors, (32862), 22989 states have internal predecessors, (32862), 10080 states have call successors, (10080), 438 states have call predecessors, (10080), 436 states have return successors, (10430), 10036 states have call predecessors, (10430), 10072 states have call successors, (10430) [2021-11-25 20:41:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33448 states to 33448 states and 53372 transitions. [2021-11-25 20:41:14,508 INFO L78 Accepts]: Start accepts. Automaton has 33448 states and 53372 transitions. Word has length 53 [2021-11-25 20:41:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:41:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 33448 states and 53372 transitions. [2021-11-25 20:41:14,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:41:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 33448 states and 53372 transitions. [2021-11-25 20:41:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:41:14,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:41:14,518 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:41:14,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:41:14,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:41:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:41:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 544504532, now seen corresponding path program 1 times [2021-11-25 20:41:14,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:41:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320513906] [2021-11-25 20:41:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:14,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:41:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:41:15,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:41:15,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320513906] [2021-11-25 20:41:15,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320513906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:41:15,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:41:15,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:41:15,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535744601] [2021-11-25 20:41:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:41:15,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:41:15,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:41:15,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:41:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:41:15,482 INFO L87 Difference]: Start difference. First operand 33448 states and 53372 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, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:41:18,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:20,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:22,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:25,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:28,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:41:29,104 INFO L93 Difference]: Finished difference Result 33546 states and 53487 transitions. [2021-11-25 20:41:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:41:29,105 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, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2021-11-25 20:41:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:41:29,305 INFO L225 Difference]: With dead ends: 33546 [2021-11-25 20:41:29,306 INFO L226 Difference]: Without dead ends: 33543 [2021-11-25 20:41:29,330 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 [2021-11-25 20:41:29,332 INFO L933 BasicCegarLoop]: 6459 mSDtfsCounter, 224 mSDsluCounter, 6483 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 12713 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:41:29,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 12713 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2021-11-25 20:41:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33543 states. [2021-11-25 20:41:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33543 to 33543. [2021-11-25 20:41:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33543 states, 22993 states have (on average 1.4326099247597095) internal successors, (32940), 23050 states have internal predecessors, (32940), 10095 states have call successors, (10095), 456 states have call predecessors, (10095), 454 states have return successors, (10446), 10052 states have call predecessors, (10446), 10088 states have call successors, (10446) [2021-11-25 20:41:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33543 states to 33543 states and 53481 transitions. [2021-11-25 20:41:34,935 INFO L78 Accepts]: Start accepts. Automaton has 33543 states and 53481 transitions. Word has length 54 [2021-11-25 20:41:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:41:34,936 INFO L470 AbstractCegarLoop]: Abstraction has 33543 states and 53481 transitions. [2021-11-25 20:41:34,937 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, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:41:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33543 states and 53481 transitions. [2021-11-25 20:41:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 20:41:34,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:41:34,942 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:41:34,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:41:34,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:41:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:41:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1689897456, now seen corresponding path program 1 times [2021-11-25 20:41:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:41:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634365871] [2021-11-25 20:41:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:34,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:41:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:41:39,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:41:39,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634365871] [2021-11-25 20:41:39,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634365871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:41:39,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:41:39,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:41:39,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919807989] [2021-11-25 20:41:39,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:41:39,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:41:39,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:41:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:41:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:41:39,354 INFO L87 Difference]: Start difference. First operand 33543 states and 53481 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:41:44,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:46,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:49,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:41:53,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:41:54,457 INFO L93 Difference]: Finished difference Result 67101 states and 113947 transitions. [2021-11-25 20:41:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:41:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-11-25 20:41:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:41:54,916 INFO L225 Difference]: With dead ends: 67101 [2021-11-25 20:41:54,917 INFO L226 Difference]: Without dead ends: 33559 [2021-11-25 20:41:55,372 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 [2021-11-25 20:41:55,374 INFO L933 BasicCegarLoop]: 6455 mSDtfsCounter, 0 mSDsluCounter, 6693 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12907 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:41:55,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12907 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 485 Invalid, 4 Unknown, 0 Unchecked, 13.8s Time] [2021-11-25 20:41:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-11-25 20:42:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 33559. [2021-11-25 20:42:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33559 states, 23009 states have (on average 1.4323090964405232) internal successors, (32956), 23066 states have internal predecessors, (32956), 10095 states have call successors, (10095), 456 states have call predecessors, (10095), 454 states have return successors, (10446), 10052 states have call predecessors, (10446), 10088 states have call successors, (10446) [2021-11-25 20:42:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33559 states to 33559 states and 53497 transitions. [2021-11-25 20:42:00,613 INFO L78 Accepts]: Start accepts. Automaton has 33559 states and 53497 transitions. Word has length 58 [2021-11-25 20:42:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:42:00,614 INFO L470 AbstractCegarLoop]: Abstraction has 33559 states and 53497 transitions. [2021-11-25 20:42:00,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:42:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33559 states and 53497 transitions. [2021-11-25 20:42:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 20:42:00,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:42:00,619 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:42:00,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:42:00,620 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:42:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:42:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1933143808, now seen corresponding path program 1 times [2021-11-25 20:42:00,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:42:00,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223016864] [2021-11-25 20:42:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:00,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:42:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:42:03,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:42:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223016864] [2021-11-25 20:42:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223016864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:42:03,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:42:03,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:42:03,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153330014] [2021-11-25 20:42:03,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:42:03,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:42:03,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:42:03,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:42:03,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:42:03,375 INFO L87 Difference]: Start difference. First operand 33559 states and 53497 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:42:06,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:07,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:10,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:42:12,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:42:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:42:15,206 INFO L93 Difference]: Finished difference Result 67133 states and 113979 transitions. [2021-11-25 20:42:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:42:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2021-11-25 20:42:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:42:15,478 INFO L225 Difference]: With dead ends: 67133 [2021-11-25 20:42:15,478 INFO L226 Difference]: Without dead ends: 33575 [2021-11-25 20:42:16,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:42:16,343 INFO L933 BasicCegarLoop]: 6453 mSDtfsCounter, 10 mSDsluCounter, 6690 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12903 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:42:16,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12903 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2021-11-25 20:42:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33575 states. [2021-11-25 20:42:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33575 to 33575. [2021-11-25 20:42:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33575 states, 23025 states have (on average 1.4320086862106407) internal successors, (32972), 23082 states have internal predecessors, (32972), 10095 states have call successors, (10095), 456 states have call predecessors, (10095), 454 states have return successors, (10446), 10052 states have call predecessors, (10446), 10088 states have call successors, (10446) [2021-11-25 20:42:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33575 states to 33575 states and 53513 transitions. [2021-11-25 20:42:21,360 INFO L78 Accepts]: Start accepts. Automaton has 33575 states and 53513 transitions. Word has length 59 [2021-11-25 20:42:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:42:21,361 INFO L470 AbstractCegarLoop]: Abstraction has 33575 states and 53513 transitions. [2021-11-25 20:42:21,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:42:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 33575 states and 53513 transitions. [2021-11-25 20:42:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:42:21,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:42:21,367 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:42:21,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:42:21,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:42:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:42:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1210544398, now seen corresponding path program 1 times [2021-11-25 20:42:21,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:42:21,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735845673] [2021-11-25 20:42:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:21,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms