./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.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_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/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_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/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_24f7ba4a-0757-42d0-87b0-f4064ad0222b/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 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:15:55,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:15:55,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:15:55,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:15:55,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:15:55,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:15:55,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:15:55,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:15:55,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:15:55,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:15:55,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:15:55,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:15:55,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:15:55,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:15:55,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:15:55,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:15:55,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:15:55,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:15:55,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:15:55,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:15:55,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:15:55,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:15:55,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:15:55,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:15:55,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:15:55,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:15:55,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:15:55,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:15:55,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:15:55,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:15:55,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:15:55,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:15:55,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:15:55,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:15:55,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:15:55,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:15:55,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:15:55,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:15:55,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:15:55,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:15:55,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:15:55,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:15:55,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:15:55,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:15:55,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:15:55,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:15:55,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:15:55,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:15:55,639 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:15:55,639 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:15:55,640 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:15:55,640 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:15:55,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:15:55,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:15:55,641 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:15:55,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:15:55,642 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:15:55,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:15:55,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:15:55,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:15:55,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:15:55,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:15:55,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:15:55,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:15:55,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:15:55,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:15:55,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:15:55,645 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:15:55,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:15:55,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:15:55,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:15:55,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:55,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:15:55,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:15:55,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:15:55,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:15:55,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:15:55,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:15:55,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:15:55,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:15:55,650 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_24f7ba4a-0757-42d0-87b0-f4064ad0222b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2021-11-25 19:15:55,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:15:55,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:15:55,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:15:55,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:15:55,985 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:15:55,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2021-11-25 19:15:56,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/data/2744c4b07/ef51e090978b401da6996633a2c93c26/FLAGcbcd7ce4d [2021-11-25 19:15:57,026 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:15:57,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2021-11-25 19:15:57,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/data/2744c4b07/ef51e090978b401da6996633a2c93c26/FLAGcbcd7ce4d [2021-11-25 19:15:57,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/data/2744c4b07/ef51e090978b401da6996633a2c93c26 [2021-11-25 19:15:57,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:15:57,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:15:57,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:57,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:15:57,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:15:57,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:57" (1/1) ... [2021-11-25 19:15:57,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1fe5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:57, skipping insertion in model container [2021-11-25 19:15:57,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:57" (1/1) ... [2021-11-25 19:15:57,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:15:57,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:15:59,087 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_24f7ba4a-0757-42d0-87b0-f4064ad0222b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2021-11-25 19:15:59,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:59,162 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:15:59,490 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_24f7ba4a-0757-42d0-87b0-f4064ad0222b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2021-11-25 19:15:59,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:59,653 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:15:59,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59 WrapperNode [2021-11-25 19:15:59,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:59,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:59,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:15:59,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:15:59,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:15:59,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:15:59,874 INFO L137 Inliner]: procedures = 176, calls = 1181, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2539 [2021-11-25 19:15:59,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:59,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:15:59,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:15:59,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:15:59,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:15:59,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:15:59,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:15:59,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:16:00,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:16:00,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:16:00,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:16:00,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:16:00,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:16:00,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:16:00,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:16:00,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (1/1) ... [2021-11-25 19:16:00,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:16:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:00,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:16:00,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:16:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2021-11-25 19:16:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2021-11-25 19:16:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 19:16:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 19:16:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:16:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 19:16:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 19:16:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-25 19:16:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-25 19:16:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-25 19:16:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-25 19:16:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 19:16:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 19:16:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-25 19:16:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-25 19:16:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:16:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:16:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-25 19:16:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-25 19:16:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-11-25 19:16:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-11-25 19:16:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:16:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:16:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:16:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-25 19:16:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-25 19:16:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:16:00,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:16:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:16:00,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:16:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 19:16:00,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 19:16:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:16:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:16:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 19:16:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 19:16:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:16:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2021-11-25 19:16:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2021-11-25 19:16:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:16:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-11-25 19:16:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-11-25 19:16:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2021-11-25 19:16:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2021-11-25 19:16:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:16:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:16:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-25 19:16:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-25 19:16:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2021-11-25 19:16:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2021-11-25 19:16:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-25 19:16:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-25 19:16:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:16:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-25 19:16:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-25 19:16:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 19:16:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 19:16:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2021-11-25 19:16:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2021-11-25 19:16:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2021-11-25 19:16:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2021-11-25 19:16:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-25 19:16:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-25 19:16:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 19:16:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 19:16:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-25 19:16:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-25 19:16:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2021-11-25 19:16:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2021-11-25 19:16:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 19:16:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 19:16:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2021-11-25 19:16:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2021-11-25 19:16:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2021-11-25 19:16:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2021-11-25 19:16:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:16:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:16:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2021-11-25 19:16:00,157 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2021-11-25 19:16:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-25 19:16:00,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-25 19:16:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-25 19:16:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-25 19:16:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-25 19:16:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-25 19:16:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-25 19:16:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-25 19:16:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 19:16:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 19:16:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-25 19:16:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-25 19:16:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 19:16:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 19:16:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2021-11-25 19:16:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2021-11-25 19:16:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:16:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-25 19:16:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-25 19:16:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:16:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:16:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2021-11-25 19:16:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2021-11-25 19:16:00,620 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:16:00,622 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:16:01,207 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 19:16:07,367 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:16:07,885 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:16:07,886 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:16:07,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:16:07 BoogieIcfgContainer [2021-11-25 19:16:07,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:16:07,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:16:07,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:16:07,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:16:07,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:15:57" (1/3) ... [2021-11-25 19:16:07,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71adfeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:16:07, skipping insertion in model container [2021-11-25 19:16:07,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:59" (2/3) ... [2021-11-25 19:16:07,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71adfeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:16:07, skipping insertion in model container [2021-11-25 19:16:07,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:16:07" (3/3) ... [2021-11-25 19:16:07,904 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2021-11-25 19:16:07,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:16:07,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:16:07,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:16:07,993 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 19:16:07,993 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:16:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 680 states, 397 states have (on average 1.3904282115869018) internal successors, (552), 435 states have internal predecessors, (552), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) [2021-11-25 19:16:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 19:16:08,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:08,083 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:08,084 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1455809590, now seen corresponding path program 1 times [2021-11-25 19:16:08,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308926412] [2021-11-25 19:16:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:08,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-25 19:16:09,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308926412] [2021-11-25 19:16:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308926412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:09,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:09,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:16:09,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306832658] [2021-11-25 19:16:09,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:09,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:16:10,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:16:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:16:10,044 INFO L87 Difference]: Start difference. First operand has 680 states, 397 states have (on average 1.3904282115869018) internal successors, (552), 435 states have internal predecessors, (552), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:12,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:14,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:16,902 INFO L93 Difference]: Finished difference Result 2591 states and 3909 transitions. [2021-11-25 19:16:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:16:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 150 [2021-11-25 19:16:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:16,942 INFO L225 Difference]: With dead ends: 2591 [2021-11-25 19:16:16,943 INFO L226 Difference]: Without dead ends: 1887 [2021-11-25 19:16:16,954 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 19:16:16,958 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 2314 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 426 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:16,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 2725 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 740 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-25 19:16:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-11-25 19:16:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1871. [2021-11-25 19:16:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1096 states have (on average 1.3613138686131387) internal successors, (1492), 1182 states have internal predecessors, (1492), 651 states have call successors, (651), 124 states have call predecessors, (651), 123 states have return successors, (650), 623 states have call predecessors, (650), 650 states have call successors, (650) [2021-11-25 19:16:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2793 transitions. [2021-11-25 19:16:17,318 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2793 transitions. Word has length 150 [2021-11-25 19:16:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:17,320 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2793 transitions. [2021-11-25 19:16:17,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2793 transitions. [2021-11-25 19:16:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 19:16:17,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:17,346 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:17,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:16:17,346 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash -768408791, now seen corresponding path program 1 times [2021-11-25 19:16:17,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899276505] [2021-11-25 19:16:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:17,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-25 19:16:18,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:18,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899276505] [2021-11-25 19:16:18,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899276505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:18,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:16:18,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306857483] [2021-11-25 19:16:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:16:18,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:16:18,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:16:18,341 INFO L87 Difference]: Start difference. First operand 1871 states and 2793 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:20,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:22,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:25,024 INFO L93 Difference]: Finished difference Result 7354 states and 10974 transitions. [2021-11-25 19:16:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:16:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 147 [2021-11-25 19:16:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:25,074 INFO L225 Difference]: With dead ends: 7354 [2021-11-25 19:16:25,074 INFO L226 Difference]: Without dead ends: 5495 [2021-11-25 19:16:25,085 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 19:16:25,087 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 2259 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 419 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2259 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:25,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2259 Valid, 2682 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 729 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-25 19:16:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-11-25 19:16:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5481. [2021-11-25 19:16:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 3210 states have (on average 1.3588785046728973) internal successors, (4362), 3460 states have internal predecessors, (4362), 1907 states have call successors, (1907), 364 states have call predecessors, (1907), 363 states have return successors, (1906), 1829 states have call predecessors, (1906), 1906 states have call successors, (1906) [2021-11-25 19:16:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8175 transitions. [2021-11-25 19:16:25,621 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8175 transitions. Word has length 147 [2021-11-25 19:16:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:25,622 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 8175 transitions. [2021-11-25 19:16:25,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8175 transitions. [2021-11-25 19:16:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-25 19:16:25,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:25,638 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:25,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:16:25,638 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1518956801, now seen corresponding path program 1 times [2021-11-25 19:16:25,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:25,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110541857] [2021-11-25 19:16:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:25,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-25 19:16:26,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110541857] [2021-11-25 19:16:26,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110541857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:26,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:26,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:16:26,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455954741] [2021-11-25 19:16:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:26,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:16:26,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:26,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:16:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:16:27,002 INFO L87 Difference]: Start difference. First operand 5481 states and 8175 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:29,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:31,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:34,219 INFO L93 Difference]: Finished difference Result 21782 states and 32478 transitions. [2021-11-25 19:16:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:16:34,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 149 [2021-11-25 19:16:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:34,364 INFO L225 Difference]: With dead ends: 21782 [2021-11-25 19:16:34,364 INFO L226 Difference]: Without dead ends: 16313 [2021-11-25 19:16:34,398 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 19:16:34,402 INFO L933 BasicCegarLoop]: 1419 mSDtfsCounter, 2254 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 418 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:34,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 2706 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 730 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-11-25 19:16:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2021-11-25 19:16:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 16299. [2021-11-25 19:16:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16299 states, 9552 states have (on average 1.356574539363484) internal successors, (12958), 10282 states have internal predecessors, (12958), 5663 states have call successors, (5663), 1084 states have call predecessors, (5663), 1083 states have return successors, (5662), 5447 states have call predecessors, (5662), 5662 states have call successors, (5662) [2021-11-25 19:16:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16299 states to 16299 states and 24283 transitions. [2021-11-25 19:16:35,906 INFO L78 Accepts]: Start accepts. Automaton has 16299 states and 24283 transitions. Word has length 149 [2021-11-25 19:16:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 16299 states and 24283 transitions. [2021-11-25 19:16:35,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16299 states and 24283 transitions. [2021-11-25 19:16:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 19:16:35,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:35,936 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:35,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:16:35,937 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1621563550, now seen corresponding path program 1 times [2021-11-25 19:16:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:35,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358154837] [2021-11-25 19:16:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:35,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-25 19:16:36,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358154837] [2021-11-25 19:16:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358154837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:36,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:36,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:16:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005295543] [2021-11-25 19:16:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:36,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:16:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:16:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:16:36,766 INFO L87 Difference]: Start difference. First operand 16299 states and 24283 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:38,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:41,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:44,899 INFO L93 Difference]: Finished difference Result 62426 states and 92806 transitions. [2021-11-25 19:16:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:16:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 148 [2021-11-25 19:16:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:45,179 INFO L225 Difference]: With dead ends: 62426 [2021-11-25 19:16:45,180 INFO L226 Difference]: Without dead ends: 46139 [2021-11-25 19:16:45,282 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 19:16:45,287 INFO L933 BasicCegarLoop]: 1664 mSDtfsCounter, 2151 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 363 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 2951 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:45,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2151 Valid, 2951 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 780 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-11-25 19:16:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46139 states. [2021-11-25 19:16:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46139 to 46125. [2021-11-25 19:16:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46125 states, 27122 states have (on average 1.3539561979205073) internal successors, (36722), 29016 states have internal predecessors, (36722), 15871 states have call successors, (15871), 3132 states have call predecessors, (15871), 3131 states have return successors, (15870), 15309 states have call predecessors, (15870), 15870 states have call successors, (15870) [2021-11-25 19:16:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46125 states to 46125 states and 68463 transitions. [2021-11-25 19:16:48,668 INFO L78 Accepts]: Start accepts. Automaton has 46125 states and 68463 transitions. Word has length 148 [2021-11-25 19:16:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 46125 states and 68463 transitions. [2021-11-25 19:16:48,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:16:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 46125 states and 68463 transitions. [2021-11-25 19:16:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 19:16:48,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:48,733 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:48,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:16:48,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash 830720821, now seen corresponding path program 1 times [2021-11-25 19:16:48,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:48,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770143859] [2021-11-25 19:16:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:48,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-25 19:16:49,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770143859] [2021-11-25 19:16:49,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770143859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:49,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:49,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:49,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131428880] [2021-11-25 19:16:49,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:49,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:49,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:49,721 INFO L87 Difference]: Start difference. First operand 46125 states and 68463 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:16:51,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:54,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:57,327 INFO L93 Difference]: Finished difference Result 134824 states and 200426 transitions. [2021-11-25 19:16:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2021-11-25 19:16:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:58,121 INFO L225 Difference]: With dead ends: 134824 [2021-11-25 19:16:58,122 INFO L226 Difference]: Without dead ends: 88711 [2021-11-25 19:16:58,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:58,334 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 843 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:58,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2120 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 19:16:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88711 states. [2021-11-25 19:17:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88711 to 88708. [2021-11-25 19:17:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88708 states, 51938 states have (on average 1.3522469097770418) internal successors, (70233), 55646 states have internal predecessors, (70233), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2021-11-25 19:17:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88708 states to 88708 states and 131898 transitions. [2021-11-25 19:17:03,776 INFO L78 Accepts]: Start accepts. Automaton has 88708 states and 131898 transitions. Word has length 183 [2021-11-25 19:17:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:03,777 INFO L470 AbstractCegarLoop]: Abstraction has 88708 states and 131898 transitions. [2021-11-25 19:17:03,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:17:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 88708 states and 131898 transitions. [2021-11-25 19:17:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-25 19:17:03,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:03,905 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:03,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:17:03,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash 532037431, now seen corresponding path program 1 times [2021-11-25 19:17:03,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:03,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069125432] [2021-11-25 19:17:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:03,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-25 19:17:05,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069125432] [2021-11-25 19:17:05,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069125432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:05,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:17:05,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:17:05,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501456491] [2021-11-25 19:17:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:05,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:17:05,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:17:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:17:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:05,360 INFO L87 Difference]: Start difference. First operand 88708 states and 131898 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 19:17:07,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:09,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:13,996 INFO L93 Difference]: Finished difference Result 113459 states and 169923 transitions. [2021-11-25 19:17:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:17:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 205 [2021-11-25 19:17:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:14,613 INFO L225 Difference]: With dead ends: 113459 [2021-11-25 19:17:14,613 INFO L226 Difference]: Without dead ends: 95168 [2021-11-25 19:17:14,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:14,732 INFO L933 BasicCegarLoop]: 1229 mSDtfsCounter, 272 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:14,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 2179 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 19:17:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95168 states. [2021-11-25 19:17:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95168 to 88709. [2021-11-25 19:17:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88709 states, 51939 states have (on average 1.3522401278422764) internal successors, (70234), 55647 states have internal predecessors, (70234), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2021-11-25 19:17:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88709 states to 88709 states and 131899 transitions. [2021-11-25 19:17:19,372 INFO L78 Accepts]: Start accepts. Automaton has 88709 states and 131899 transitions. Word has length 205 [2021-11-25 19:17:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:19,374 INFO L470 AbstractCegarLoop]: Abstraction has 88709 states and 131899 transitions. [2021-11-25 19:17:19,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 19:17:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 88709 states and 131899 transitions. [2021-11-25 19:17:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-25 19:17:19,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:19,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:19,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:17:19,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash 24535647, now seen corresponding path program 1 times [2021-11-25 19:17:19,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683256012] [2021-11-25 19:17:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:19,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-25 19:17:20,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:20,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683256012] [2021-11-25 19:17:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683256012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:20,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:17:20,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:17:20,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093404633] [2021-11-25 19:17:20,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:20,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:17:20,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:17:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:17:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:20,808 INFO L87 Difference]: Start difference. First operand 88709 states and 131899 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 19:17:22,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:24,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:27,900 INFO L93 Difference]: Finished difference Result 113445 states and 169898 transitions. [2021-11-25 19:17:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:17:27,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 207 [2021-11-25 19:17:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:28,301 INFO L225 Difference]: With dead ends: 113445 [2021-11-25 19:17:28,302 INFO L226 Difference]: Without dead ends: 95153 [2021-11-25 19:17:28,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:28,395 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 257 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:28,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 2162 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 19:17:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95153 states. [2021-11-25 19:17:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95153 to 88715. [2021-11-25 19:17:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88715 states, 51945 states have (on average 1.3522379439792087) internal successors, (70242), 55653 states have internal predecessors, (70242), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2021-11-25 19:17:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88715 states to 88715 states and 131907 transitions. [2021-11-25 19:17:32,973 INFO L78 Accepts]: Start accepts. Automaton has 88715 states and 131907 transitions. Word has length 207 [2021-11-25 19:17:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:32,974 INFO L470 AbstractCegarLoop]: Abstraction has 88715 states and 131907 transitions. [2021-11-25 19:17:32,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 19:17:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 88715 states and 131907 transitions. [2021-11-25 19:17:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-25 19:17:33,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:33,042 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:33,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:17:33,043 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash 770590465, now seen corresponding path program 1 times [2021-11-25 19:17:33,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:33,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441318636] [2021-11-25 19:17:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:33,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-25 19:17:33,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:33,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441318636] [2021-11-25 19:17:33,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441318636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:17:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349467007] [2021-11-25 19:17:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:33,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:17:33,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:17:33,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:17:33,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24f7ba4a-0757-42d0-87b0-f4064ad0222b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:17:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 7440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:17:36,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-25 19:17:37,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:17:37,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349467007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:37,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:17:37,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:17:37,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10257532] [2021-11-25 19:17:37,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:37,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:17:37,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:17:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:17:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:17:37,015 INFO L87 Difference]: Start difference. First operand 88715 states and 131907 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-25 19:17:39,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:41,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []