./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:04:31,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:04:31,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:04:31,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:04:31,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:04:31,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:04:31,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:04:31,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:04:31,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:04:31,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:04:31,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:04:31,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:04:31,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:04:31,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:04:31,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:04:31,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:04:31,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:04:31,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:04:31,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:04:31,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:04:31,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:04:31,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:04:31,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:04:31,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:04:31,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:04:31,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:04:31,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:04:31,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:04:31,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:04:31,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:04:31,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:04:31,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:04:31,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:04:31,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:04:31,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:04:31,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:04:31,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:04:31,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:04:31,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:04:31,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:04:31,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:04:31,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:04:31,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:04:31,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:04:31,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:04:31,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:04:31,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:04:31,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:04:31,576 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:04:31,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:04:31,577 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:04:31,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:04:31,578 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:04:31,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:04:31,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:04:31,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:04:31,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:04:31,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:04:31,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:04:31,580 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:04:31,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:04:31,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:04:31,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:04:31,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:04:31,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:04:31,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:04:31,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:04:31,582 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:04:31,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:04:31,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:04:31,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:04:31,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:04:31,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:04:31,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:04:31,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:04:31,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:04:31,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:04:31,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:04:31,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:04:31,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:04:31,587 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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-25 18:04:31,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:04:31,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:04:31,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:04:31,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:04:31,862 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:04:31,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-25 18:04:31,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/data/a798252bb/f84f38bd2a644024a406f0e63eecae20/FLAG32d310e8c [2021-11-25 18:04:32,846 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:04:32,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-25 18:04:32,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/data/a798252bb/f84f38bd2a644024a406f0e63eecae20/FLAG32d310e8c [2021-11-25 18:04:33,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/data/a798252bb/f84f38bd2a644024a406f0e63eecae20 [2021-11-25 18:04:33,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:04:33,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:04:33,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:04:33,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:04:33,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:04:33,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:33" (1/1) ... [2021-11-25 18:04:33,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ceda1e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:33, skipping insertion in model container [2021-11-25 18:04:33,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:33" (1/1) ... [2021-11-25 18:04:33,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:04:33,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:04:35,993 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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-25 18:04:35,996 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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-25 18:04:36,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:04:36,068 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:04:36,431 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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-25 18:04:36,431 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_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-25 18:04:36,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:04:36,664 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:04:36,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36 WrapperNode [2021-11-25 18:04:36,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:04:36,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:04:36,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:04:36,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:04:36,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:36,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,021 INFO L137 Inliner]: procedures = 391, calls = 2618, calls flagged for inlining = 190, calls inlined = 155, statements flattened = 4319 [2021-11-25 18:04:37,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:04:37,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:04:37,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:04:37,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:04:37,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:04:37,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:04:37,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:04:37,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:04:37,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (1/1) ... [2021-11-25 18:04:37,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:04:37,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:37,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:04:37,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:04:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_95 [2021-11-25 18:04:37,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_95 [2021-11-25 18:04:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:04:37,346 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:04:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 18:04:37,346 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 18:04:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:04:37,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:04:37,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_91 [2021-11-25 18:04:37,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_91 [2021-11-25 18:04:37,347 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_open [2021-11-25 18:04:37,347 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_open [2021-11-25 18:04:37,347 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:04:37,347 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-25 18:04:37,348 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-25 18:04:37,348 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resume [2021-11-25 18:04:37,348 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resume [2021-11-25 18:04:37,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 18:04:37,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 18:04:37,348 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 18:04:37,349 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 18:04:37,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 18:04:37,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 18:04:37,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:04:37,349 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 18:04:37,350 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 18:04:37,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:04:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-25 18:04:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-25 18:04:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_rx_urb [2021-11-25 18:04:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_rx_urb [2021-11-25 18:04:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:04:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 18:04:37,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 18:04:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-25 18:04:37,401 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-25 18:04:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:04:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-25 18:04:37,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-25 18:04:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:04:37,402 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:04:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 18:04:37,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 18:04:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-25 18:04:37,402 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-25 18:04:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-25 18:04:37,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-25 18:04:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_close [2021-11-25 18:04:37,403 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_close [2021-11-25 18:04:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_download_firmware [2021-11-25 18:04:37,403 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_download_firmware [2021-11-25 18:04:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:04:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 18:04:37,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 18:04:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:04:37,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 18:04:37,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 18:04:37,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:04:37,404 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 18:04:37,404 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 18:04:37,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 18:04:37,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-25 18:04:37,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-25 18:04:37,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-25 18:04:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-25 18:04:37,405 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-25 18:04:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-25 18:04:37,405 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 18:04:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 18:04:37,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 18:04:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 18:04:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-11-25 18:04:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-11-25 18:04:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-25 18:04:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-25 18:04:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_tx_timeout [2021-11-25 18:04:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_tx_timeout [2021-11-25 18:04:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:04:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:04:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-25 18:04:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-25 18:04:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-25 18:04:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-25 18:04:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:04:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:04:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:04:37,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:04:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-25 18:04:37,408 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-25 18:04:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_async_set_rx_mode [2021-11-25 18:04:37,408 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_async_set_rx_mode [2021-11-25 18:04:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 18:04:37,408 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 18:04:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-25 18:04:37,408 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-25 18:04:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:04:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 18:04:37,409 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 18:04:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:04:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:04:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 18:04:37,409 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 18:04:37,409 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-25 18:04:37,409 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-25 18:04:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 18:04:37,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 18:04:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-25 18:04:37,410 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-25 18:04:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-25 18:04:37,410 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-25 18:04:37,410 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 18:04:37,410 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 18:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 18:04:37,411 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 18:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_set_rx_mode [2021-11-25 18:04:37,411 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_set_rx_mode [2021-11-25 18:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-25 18:04:37,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-25 18:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:04:37,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_int_urb [2021-11-25 18:04:37,412 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_int_urb [2021-11-25 18:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_control [2021-11-25 18:04:37,412 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_control [2021-11-25 18:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 18:04:37,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 18:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-25 18:04:37,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-25 18:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-25 18:04:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_kill_urbs [2021-11-25 18:04:37,413 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_kill_urbs [2021-11-25 18:04:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2021-11-25 18:04:37,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2021-11-25 18:04:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_disconnect [2021-11-25 18:04:37,413 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_disconnect [2021-11-25 18:04:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:04:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 18:04:37,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 18:04:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-25 18:04:37,414 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-25 18:04:38,059 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:04:38,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:04:38,255 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:04:44,666 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 18:04:44,707 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:04:45,307 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:04:45,307 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:04:45,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:45 BoogieIcfgContainer [2021-11-25 18:04:45,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:04:45,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:04:45,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:04:45,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:04:45,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:04:33" (1/3) ... [2021-11-25 18:04:45,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b48e8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:45, skipping insertion in model container [2021-11-25 18:04:45,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:36" (2/3) ... [2021-11-25 18:04:45,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b48e8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:45, skipping insertion in model container [2021-11-25 18:04:45,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:45" (3/3) ... [2021-11-25 18:04:45,320 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-25 18:04:45,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:04:45,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:04:45,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:04:45,401 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 18:04:45,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:04:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 783 states, 442 states have (on average 1.257918552036199) internal successors, (556), 447 states have internal predecessors, (556), 280 states have call successors, (280), 61 states have call predecessors, (280), 60 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2021-11-25 18:04:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 18:04:45,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:45,481 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:45,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:45,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2121611204, now seen corresponding path program 1 times [2021-11-25 18:04:45,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301838785] [2021-11-25 18:04:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:45,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 18:04:46,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301838785] [2021-11-25 18:04:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301838785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:46,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:46,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:46,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300256931] [2021-11-25 18:04:46,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:46,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:46,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:46,321 INFO L87 Difference]: Start difference. First operand has 783 states, 442 states have (on average 1.257918552036199) internal successors, (556), 447 states have internal predecessors, (556), 280 states have call successors, (280), 61 states have call predecessors, (280), 60 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:04:48,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:50,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:52,170 INFO L93 Difference]: Finished difference Result 1878 states and 2703 transitions. [2021-11-25 18:04:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 132 [2021-11-25 18:04:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:52,198 INFO L225 Difference]: With dead ends: 1878 [2021-11-25 18:04:52,198 INFO L226 Difference]: Without dead ends: 1050 [2021-11-25 18:04:52,212 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 18:04:52,216 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 449 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:52,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1920 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 18:04:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-25 18:04:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1046. [2021-11-25 18:04:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 621 states have (on average 1.2560386473429952) internal successors, (780), 629 states have internal predecessors, (780), 333 states have call successors, (333), 91 states have call predecessors, (333), 91 states have return successors, (333), 330 states have call predecessors, (333), 333 states have call successors, (333) [2021-11-25 18:04:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1446 transitions. [2021-11-25 18:04:52,408 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1446 transitions. Word has length 132 [2021-11-25 18:04:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:52,410 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1446 transitions. [2021-11-25 18:04:52,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:04:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1446 transitions. [2021-11-25 18:04:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 18:04:52,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:52,420 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:52,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:04:52,421 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2003354126, now seen corresponding path program 1 times [2021-11-25 18:04:52,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520380315] [2021-11-25 18:04:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:52,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-25 18:04:52,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520380315] [2021-11-25 18:04:52,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520380315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:52,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:52,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:52,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901949598] [2021-11-25 18:04:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:52,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:52,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:52,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:52,740 INFO L87 Difference]: Start difference. First operand 1046 states and 1446 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 18:04:54,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:57,373 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 18:04:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:58,327 INFO L93 Difference]: Finished difference Result 2771 states and 3838 transitions. [2021-11-25 18:04:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:58,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 144 [2021-11-25 18:04:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:58,345 INFO L225 Difference]: With dead ends: 2771 [2021-11-25 18:04:58,346 INFO L226 Difference]: Without dead ends: 1742 [2021-11-25 18:04:58,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:58,352 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 865 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:58,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1901 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 388 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-25 18:04:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-11-25 18:04:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1738. [2021-11-25 18:04:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1034 states have (on average 1.2446808510638299) internal successors, (1287), 1047 states have internal predecessors, (1287), 557 states have call successors, (557), 146 states have call predecessors, (557), 146 states have return successors, (560), 549 states have call predecessors, (560), 557 states have call successors, (560) [2021-11-25 18:04:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2404 transitions. [2021-11-25 18:04:58,462 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2404 transitions. Word has length 144 [2021-11-25 18:04:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 2404 transitions. [2021-11-25 18:04:58,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 18:04:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2404 transitions. [2021-11-25 18:04:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 18:04:58,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:58,468 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:58,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:04:58,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2057792692, now seen corresponding path program 1 times [2021-11-25 18:04:58,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:58,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775852952] [2021-11-25 18:04:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:58,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-25 18:04:58,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775852952] [2021-11-25 18:04:58,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775852952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:58,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829451506] [2021-11-25 18:04:58,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:58,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:58,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:58,853 INFO L87 Difference]: Start difference. First operand 1738 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 18:05:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:02,382 INFO L93 Difference]: Finished difference Result 3837 states and 5284 transitions. [2021-11-25 18:05:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:05:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 150 [2021-11-25 18:05:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:02,400 INFO L225 Difference]: With dead ends: 3837 [2021-11-25 18:05:02,401 INFO L226 Difference]: Without dead ends: 2116 [2021-11-25 18:05:02,409 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 18:05:02,413 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 387 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:02,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1963 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 18:05:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-25 18:05:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2112. [2021-11-25 18:05:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 1279 states have (on average 1.2470680218921033) internal successors, (1595), 1296 states have internal predecessors, (1595), 650 states have call successors, (650), 182 states have call predecessors, (650), 182 states have return successors, (653), 640 states have call predecessors, (653), 650 states have call successors, (653) [2021-11-25 18:05:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 2898 transitions. [2021-11-25 18:05:02,545 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 2898 transitions. Word has length 150 [2021-11-25 18:05:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:02,546 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 2898 transitions. [2021-11-25 18:05:02,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 18:05:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 2898 transitions. [2021-11-25 18:05:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-25 18:05:02,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:02,551 INFO L514 BasicCegarLoop]: trace histogram [13, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:02,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:05:02,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -135756040, now seen corresponding path program 1 times [2021-11-25 18:05:02,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:02,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609569221] [2021-11-25 18:05:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:02,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-11-25 18:05:02,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609569221] [2021-11-25 18:05:02,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609569221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:02,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:02,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:05:02,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547424064] [2021-11-25 18:05:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:02,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:05:02,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:05:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:05:02,881 INFO L87 Difference]: Start difference. First operand 2112 states and 2898 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:05:05,765 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 18:05:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:06,710 INFO L93 Difference]: Finished difference Result 4796 states and 6545 transitions. [2021-11-25 18:05:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:05:06,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 197 [2021-11-25 18:05:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:06,738 INFO L225 Difference]: With dead ends: 4796 [2021-11-25 18:05:06,738 INFO L226 Difference]: Without dead ends: 2701 [2021-11-25 18:05:06,747 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 18:05:06,753 INFO L933 BasicCegarLoop]: 1173 mSDtfsCounter, 760 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:06,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1757 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 434 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 18:05:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-25 18:05:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2693. [2021-11-25 18:05:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 1637 states have (on average 1.2449602932193036) internal successors, (2038), 1662 states have internal predecessors, (2038), 801 states have call successors, (801), 254 states have call predecessors, (801), 254 states have return successors, (806), 785 states have call predecessors, (806), 801 states have call successors, (806) [2021-11-25 18:05:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 3645 transitions. [2021-11-25 18:05:06,907 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 3645 transitions. Word has length 197 [2021-11-25 18:05:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:06,908 INFO L470 AbstractCegarLoop]: Abstraction has 2693 states and 3645 transitions. [2021-11-25 18:05:06,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:05:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 3645 transitions. [2021-11-25 18:05:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-25 18:05:06,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:06,949 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 12, 9, 9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:06,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:05:06,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash 408761307, now seen corresponding path program 1 times [2021-11-25 18:05:06,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:06,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345346004] [2021-11-25 18:05:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:06,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-25 18:05:07,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345346004] [2021-11-25 18:05:07,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345346004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:07,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:07,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:05:07,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207789415] [2021-11-25 18:05:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:07,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:05:07,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:05:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:05:07,506 INFO L87 Difference]: Start difference. First operand 2693 states and 3645 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 18:05:11,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:12,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:14,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:16,232 INFO L93 Difference]: Finished difference Result 6287 states and 8679 transitions. [2021-11-25 18:05:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:05:16,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 282 [2021-11-25 18:05:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:16,264 INFO L225 Difference]: With dead ends: 6287 [2021-11-25 18:05:16,264 INFO L226 Difference]: Without dead ends: 3611 [2021-11-25 18:05:16,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:05:16,277 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 347 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 138 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:16,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 2879 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 600 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2021-11-25 18:05:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-25 18:05:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2697. [2021-11-25 18:05:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 1641 states have (on average 1.2443631931748933) internal successors, (2042), 1666 states have internal predecessors, (2042), 801 states have call successors, (801), 254 states have call predecessors, (801), 254 states have return successors, (806), 785 states have call predecessors, (806), 801 states have call successors, (806) [2021-11-25 18:05:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 3649 transitions. [2021-11-25 18:05:16,549 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 3649 transitions. Word has length 282 [2021-11-25 18:05:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:16,550 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 3649 transitions. [2021-11-25 18:05:16,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 18:05:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 3649 transitions. [2021-11-25 18:05:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-25 18:05:16,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:16,557 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:16,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:05:16,558 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:16,559 INFO L85 PathProgramCache]: Analyzing trace with hash 689927914, now seen corresponding path program 1 times [2021-11-25 18:05:16,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:16,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044206383] [2021-11-25 18:05:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:16,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-25 18:05:17,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044206383] [2021-11-25 18:05:17,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044206383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:17,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:17,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:05:17,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902117264] [2021-11-25 18:05:17,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:17,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:05:17,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:05:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:05:17,006 INFO L87 Difference]: Start difference. First operand 2697 states and 3649 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-25 18:05:20,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:21,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:23,186 INFO L93 Difference]: Finished difference Result 5383 states and 7281 transitions. [2021-11-25 18:05:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:05:23,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 299 [2021-11-25 18:05:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:23,207 INFO L225 Difference]: With dead ends: 5383 [2021-11-25 18:05:23,207 INFO L226 Difference]: Without dead ends: 2703 [2021-11-25 18:05:23,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:05:23,217 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 1 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:23,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2583 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-25 18:05:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-11-25 18:05:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2701. [2021-11-25 18:05:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 1645 states have (on average 1.2437689969604864) internal successors, (2046), 1670 states have internal predecessors, (2046), 801 states have call successors, (801), 254 states have call predecessors, (801), 254 states have return successors, (806), 785 states have call predecessors, (806), 801 states have call successors, (806) [2021-11-25 18:05:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3653 transitions. [2021-11-25 18:05:23,364 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3653 transitions. Word has length 299 [2021-11-25 18:05:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:23,368 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3653 transitions. [2021-11-25 18:05:23,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-25 18:05:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3653 transitions. [2021-11-25 18:05:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-25 18:05:23,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:23,376 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:23,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:05:23,377 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash -469736136, now seen corresponding path program 1 times [2021-11-25 18:05:23,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:23,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063009961] [2021-11-25 18:05:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:23,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-25 18:05:23,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063009961] [2021-11-25 18:05:23,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063009961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462176096] [2021-11-25 18:05:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:23,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:23,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:23,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:05:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 5438 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 18:05:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2021-11-25 18:05:37,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462176096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:37,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:05:37,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-25 18:05:37,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023444329] [2021-11-25 18:05:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:37,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:05:37,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:05:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:05:37,856 INFO L87 Difference]: Start difference. First operand 2701 states and 3653 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-25 18:05:41,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:42,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:44,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:45,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:49,046 INFO L93 Difference]: Finished difference Result 4927 states and 6712 transitions. [2021-11-25 18:05:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:05:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) Word has length 301 [2021-11-25 18:05:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:49,084 INFO L225 Difference]: With dead ends: 4927 [2021-11-25 18:05:49,084 INFO L226 Difference]: Without dead ends: 4925 [2021-11-25 18:05:49,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:05:49,089 INFO L933 BasicCegarLoop]: 1089 mSDtfsCounter, 770 mSDsluCounter, 4036 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 4423 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:49,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 4423 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1361 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-25 18:05:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2021-11-25 18:05:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 4912. [2021-11-25 18:05:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 3013 states have (on average 1.247261865250581) internal successors, (3758), 3069 states have internal predecessors, (3758), 1448 states have call successors, (1448), 457 states have call predecessors, (1448), 450 states have return successors, (1462), 1399 states have call predecessors, (1462), 1448 states have call successors, (1462) [2021-11-25 18:05:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 6668 transitions. [2021-11-25 18:05:49,473 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 6668 transitions. Word has length 301 [2021-11-25 18:05:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:49,474 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 6668 transitions. [2021-11-25 18:05:49,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-25 18:05:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 6668 transitions. [2021-11-25 18:05:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-25 18:05:49,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:49,484 INFO L514 BasicCegarLoop]: trace histogram [17, 15, 15, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:49,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:49,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:49,700 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash 546560232, now seen corresponding path program 1 times [2021-11-25 18:05:49,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:49,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313439344] [2021-11-25 18:05:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:49,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-25 18:05:50,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313439344] [2021-11-25 18:05:50,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313439344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:50,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:50,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:05:50,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674693508] [2021-11-25 18:05:50,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:50,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:05:50,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:05:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:05:50,047 INFO L87 Difference]: Start difference. First operand 4912 states and 6668 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-25 18:05:53,229 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 18:05:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:54,862 INFO L93 Difference]: Finished difference Result 10454 states and 14197 transitions. [2021-11-25 18:05:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:05:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 341 [2021-11-25 18:05:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:54,901 INFO L225 Difference]: With dead ends: 10454 [2021-11-25 18:05:54,902 INFO L226 Difference]: Without dead ends: 5559 [2021-11-25 18:05:54,920 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 18:05:54,920 INFO L933 BasicCegarLoop]: 1082 mSDtfsCounter, 417 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:54,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 2783 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 881 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 18:05:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5559 states. [2021-11-25 18:05:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5559 to 5549. [2021-11-25 18:05:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 3432 states have (on average 1.252039627039627) internal successors, (4297), 3500 states have internal predecessors, (4297), 1601 states have call successors, (1601), 523 states have call predecessors, (1601), 515 states have return successors, (1615), 1542 states have call predecessors, (1615), 1601 states have call successors, (1615) [2021-11-25 18:05:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 7513 transitions. [2021-11-25 18:05:55,293 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 7513 transitions. Word has length 341 [2021-11-25 18:05:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:55,294 INFO L470 AbstractCegarLoop]: Abstraction has 5549 states and 7513 transitions. [2021-11-25 18:05:55,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-25 18:05:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 7513 transitions. [2021-11-25 18:05:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-25 18:05:55,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:55,307 INFO L514 BasicCegarLoop]: trace histogram [19, 16, 16, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:55,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:05:55,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:55,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1015465238, now seen corresponding path program 1 times [2021-11-25 18:05:55,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:55,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068128752] [2021-11-25 18:05:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:55,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-25 18:05:55,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:55,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068128752] [2021-11-25 18:05:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068128752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:55,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:55,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:05:55,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822907118] [2021-11-25 18:05:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:55,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:05:55,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:05:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:05:55,734 INFO L87 Difference]: Start difference. First operand 5549 states and 7513 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:05:58,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:01,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:03,863 INFO L93 Difference]: Finished difference Result 14420 states and 19983 transitions. [2021-11-25 18:06:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:03,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 378 [2021-11-25 18:06:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:03,921 INFO L225 Difference]: With dead ends: 14420 [2021-11-25 18:06:03,921 INFO L226 Difference]: Without dead ends: 8888 [2021-11-25 18:06:03,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:03,942 INFO L933 BasicCegarLoop]: 1494 mSDtfsCounter, 1025 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 3891 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:03,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 3891 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-25 18:06:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-11-25 18:06:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 6349. [2021-11-25 18:06:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6349 states, 3941 states have (on average 1.2522202486678509) internal successors, (4935), 4021 states have internal predecessors, (4935), 1800 states have call successors, (1800), 616 states have call predecessors, (1800), 607 states have return successors, (1814), 1731 states have call predecessors, (1814), 1800 states have call successors, (1814) [2021-11-25 18:06:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6349 states to 6349 states and 8549 transitions. [2021-11-25 18:06:04,492 INFO L78 Accepts]: Start accepts. Automaton has 6349 states and 8549 transitions. Word has length 378 [2021-11-25 18:06:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:04,493 INFO L470 AbstractCegarLoop]: Abstraction has 6349 states and 8549 transitions. [2021-11-25 18:06:04,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6349 states and 8549 transitions. [2021-11-25 18:06:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-25 18:06:04,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:04,501 INFO L514 BasicCegarLoop]: trace histogram [19, 16, 16, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:04,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:06:04,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:04,502 INFO L85 PathProgramCache]: Analyzing trace with hash -439333119, now seen corresponding path program 1 times [2021-11-25 18:06:04,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:04,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835483075] [2021-11-25 18:06:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:04,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-25 18:06:04,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835483075] [2021-11-25 18:06:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835483075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:04,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:04,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:06:04,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377756764] [2021-11-25 18:06:04,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:04,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:04,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:04,831 INFO L87 Difference]: Start difference. First operand 6349 states and 8549 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:08,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:10,570 INFO L93 Difference]: Finished difference Result 15794 states and 21749 transitions. [2021-11-25 18:06:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 379 [2021-11-25 18:06:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:10,613 INFO L225 Difference]: With dead ends: 15794 [2021-11-25 18:06:10,613 INFO L226 Difference]: Without dead ends: 9473 [2021-11-25 18:06:10,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:10,731 INFO L933 BasicCegarLoop]: 1427 mSDtfsCounter, 705 mSDsluCounter, 2846 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 3794 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:10,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 3794 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 901 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 18:06:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9473 states. [2021-11-25 18:06:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9473 to 6942. [2021-11-25 18:06:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6942 states, 4328 states have (on average 1.2564695009242144) internal successors, (5438), 4420 states have internal predecessors, (5438), 1953 states have call successors, (1953), 670 states have call predecessors, (1953), 660 states have return successors, (1967), 1874 states have call predecessors, (1967), 1953 states have call successors, (1967) [2021-11-25 18:06:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6942 states to 6942 states and 9358 transitions. [2021-11-25 18:06:11,309 INFO L78 Accepts]: Start accepts. Automaton has 6942 states and 9358 transitions. Word has length 379 [2021-11-25 18:06:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:11,310 INFO L470 AbstractCegarLoop]: Abstraction has 6942 states and 9358 transitions. [2021-11-25 18:06:11,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6942 states and 9358 transitions. [2021-11-25 18:06:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-11-25 18:06:11,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:11,318 INFO L514 BasicCegarLoop]: trace histogram [19, 16, 16, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:11,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:06:11,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1096926441, now seen corresponding path program 1 times [2021-11-25 18:06:11,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842494160] [2021-11-25 18:06:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:11,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-25 18:06:11,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842494160] [2021-11-25 18:06:11,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842494160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:11,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:11,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:06:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024680611] [2021-11-25 18:06:11,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:11,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:11,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:11,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:11,853 INFO L87 Difference]: Start difference. First operand 6942 states and 9358 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:14,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:16,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:19,113 INFO L93 Difference]: Finished difference Result 16932 states and 23319 transitions. [2021-11-25 18:06:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 373 [2021-11-25 18:06:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:19,154 INFO L225 Difference]: With dead ends: 16932 [2021-11-25 18:06:19,155 INFO L226 Difference]: Without dead ends: 10018 [2021-11-25 18:06:19,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:19,173 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 881 mSDsluCounter, 2969 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3888 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:19,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 3888 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-25 18:06:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10018 states. [2021-11-25 18:06:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10018 to 7551. [2021-11-25 18:06:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 4731 states have (on average 1.259141830479814) internal successors, (5957), 4835 states have internal predecessors, (5957), 2106 states have call successors, (2106), 724 states have call predecessors, (2106), 713 states have return successors, (2120), 2017 states have call predecessors, (2120), 2106 states have call successors, (2120) [2021-11-25 18:06:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 10183 transitions. [2021-11-25 18:06:19,676 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 10183 transitions. Word has length 373 [2021-11-25 18:06:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:19,677 INFO L470 AbstractCegarLoop]: Abstraction has 7551 states and 10183 transitions. [2021-11-25 18:06:19,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 10183 transitions. [2021-11-25 18:06:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-25 18:06:19,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:19,686 INFO L514 BasicCegarLoop]: trace histogram [19, 16, 16, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:19,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:06:19,686 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1174312444, now seen corresponding path program 1 times [2021-11-25 18:06:19,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:19,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462364353] [2021-11-25 18:06:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:19,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-25 18:06:20,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462364353] [2021-11-25 18:06:20,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462364353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:20,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:20,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:06:20,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477386642] [2021-11-25 18:06:20,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:20,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:20,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:20,012 INFO L87 Difference]: Start difference. First operand 7551 states and 10183 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:23,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:24,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:27,320 INFO L93 Difference]: Finished difference Result 17892 states and 24553 transitions. [2021-11-25 18:06:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:27,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 381 [2021-11-25 18:06:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:27,358 INFO L225 Difference]: With dead ends: 17892 [2021-11-25 18:06:27,359 INFO L226 Difference]: Without dead ends: 10369 [2021-11-25 18:06:27,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:27,374 INFO L933 BasicCegarLoop]: 1425 mSDtfsCounter, 787 mSDsluCounter, 2809 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:27,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 3764 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-25 18:06:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2021-11-25 18:06:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 7829. [2021-11-25 18:06:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 4914 states have (on average 1.2545787545787546) internal successors, (6165), 5018 states have internal predecessors, (6165), 2160 states have call successors, (2160), 763 states have call predecessors, (2160), 754 states have return successors, (2168), 2075 states have call predecessors, (2168), 2160 states have call successors, (2168) [2021-11-25 18:06:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 10493 transitions. [2021-11-25 18:06:28,085 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 10493 transitions. Word has length 381 [2021-11-25 18:06:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 7829 states and 10493 transitions. [2021-11-25 18:06:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-25 18:06:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 10493 transitions. [2021-11-25 18:06:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-25 18:06:28,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:28,098 INFO L514 BasicCegarLoop]: trace histogram [20, 18, 18, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:28,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:06:28,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1035272491, now seen corresponding path program 1 times [2021-11-25 18:06:28,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:28,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192538898] [2021-11-25 18:06:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:28,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2021-11-25 18:06:28,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:28,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192538898] [2021-11-25 18:06:28,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192538898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:28,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:28,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:28,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782635084] [2021-11-25 18:06:28,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:28,543 INFO L87 Difference]: Start difference. First operand 7829 states and 10493 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2021-11-25 18:06:31,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:33,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:34,220 INFO L93 Difference]: Finished difference Result 12551 states and 16760 transitions. [2021-11-25 18:06:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 455 [2021-11-25 18:06:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:34,249 INFO L225 Difference]: With dead ends: 12551 [2021-11-25 18:06:34,250 INFO L226 Difference]: Without dead ends: 7829 [2021-11-25 18:06:34,260 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 18:06:34,260 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 450 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:34,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 1911 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-25 18:06:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2021-11-25 18:06:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7809. [2021-11-25 18:06:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 4899 states have (on average 1.2506634006940192) internal successors, (6127), 5001 states have internal predecessors, (6127), 2143 states have call successors, (2143), 775 states have call predecessors, (2143), 766 states have return successors, (2149), 2060 states have call predecessors, (2149), 2143 states have call successors, (2149) [2021-11-25 18:06:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 10419 transitions. [2021-11-25 18:06:34,831 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 10419 transitions. Word has length 455 [2021-11-25 18:06:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:34,833 INFO L470 AbstractCegarLoop]: Abstraction has 7809 states and 10419 transitions. [2021-11-25 18:06:34,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2021-11-25 18:06:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 10419 transitions. [2021-11-25 18:06:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-25 18:06:34,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:34,847 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:34,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:06:34,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1226109936, now seen corresponding path program 1 times [2021-11-25 18:06:34,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:34,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804660527] [2021-11-25 18:06:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:34,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2021-11-25 18:06:36,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:36,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804660527] [2021-11-25 18:06:36,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804660527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:36,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:36,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:06:36,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758473193] [2021-11-25 18:06:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:36,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:06:36,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:06:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:06:36,398 INFO L87 Difference]: Start difference. First operand 7809 states and 10419 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (62), 5 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-25 18:06:41,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:44,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:45,702 INFO L93 Difference]: Finished difference Result 8149 states and 10815 transitions. [2021-11-25 18:06:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:06:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (62), 5 states have call predecessors, (62), 3 states have call successors, (62) Word has length 477 [2021-11-25 18:06:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:45,730 INFO L225 Difference]: With dead ends: 8149 [2021-11-25 18:06:45,730 INFO L226 Difference]: Without dead ends: 8147 [2021-11-25 18:06:45,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:06:45,734 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 1620 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:45,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 3123 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 18:06:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8147 states. [2021-11-25 18:06:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8147 to 8109. [2021-11-25 18:06:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8109 states, 5064 states have (on average 1.2436808846761453) internal successors, (6298), 5166 states have internal predecessors, (6298), 2190 states have call successors, (2190), 863 states have call predecessors, (2190), 854 states have return successors, (2196), 2107 states have call predecessors, (2196), 2190 states have call successors, (2196) [2021-11-25 18:06:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8109 states to 8109 states and 10684 transitions. [2021-11-25 18:06:46,548 INFO L78 Accepts]: Start accepts. Automaton has 8109 states and 10684 transitions. Word has length 477 [2021-11-25 18:06:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:46,549 INFO L470 AbstractCegarLoop]: Abstraction has 8109 states and 10684 transitions. [2021-11-25 18:06:46,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (62), 5 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-25 18:06:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8109 states and 10684 transitions. [2021-11-25 18:06:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-11-25 18:06:46,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:46,569 INFO L514 BasicCegarLoop]: trace histogram [24, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:46,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:06:46,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1596614629, now seen corresponding path program 1 times [2021-11-25 18:06:46,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:46,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603545495] [2021-11-25 18:06:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:46,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 2431 trivial. 0 not checked. [2021-11-25 18:06:47,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:47,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603545495] [2021-11-25 18:06:47,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603545495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:47,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:47,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:47,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338036252] [2021-11-25 18:06:47,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:47,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:47,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:47,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:47,347 INFO L87 Difference]: Start difference. First operand 8109 states and 10684 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 3 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2021-11-25 18:06:50,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:53,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:53,816 INFO L93 Difference]: Finished difference Result 19024 states and 25208 transitions. [2021-11-25 18:06:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 3 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 651 [2021-11-25 18:06:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:53,862 INFO L225 Difference]: With dead ends: 19024 [2021-11-25 18:06:53,862 INFO L226 Difference]: Without dead ends: 10943 [2021-11-25 18:06:53,880 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 18:06:53,881 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 817 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:53,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 2318 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 18:06:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10943 states. [2021-11-25 18:06:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10943 to 10939. [2021-11-25 18:06:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10939 states, 6931 states have (on average 1.2491703938825567) internal successors, (8658), 7068 states have internal predecessors, (8658), 2911 states have call successors, (2911), 1106 states have call predecessors, (2911), 1096 states have return successors, (2923), 2792 states have call predecessors, (2923), 2911 states have call successors, (2923) [2021-11-25 18:06:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10939 states to 10939 states and 14492 transitions. [2021-11-25 18:06:54,857 INFO L78 Accepts]: Start accepts. Automaton has 10939 states and 14492 transitions. Word has length 651 [2021-11-25 18:06:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:54,859 INFO L470 AbstractCegarLoop]: Abstraction has 10939 states and 14492 transitions. [2021-11-25 18:06:54,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 3 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2021-11-25 18:06:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10939 states and 14492 transitions. [2021-11-25 18:06:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2021-11-25 18:06:54,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:54,881 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:54,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:06:54,882 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1915381733, now seen corresponding path program 1 times [2021-11-25 18:06:54,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780455127] [2021-11-25 18:06:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:54,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-25 18:06:55,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:55,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780455127] [2021-11-25 18:06:55,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780455127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:55,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:55,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:06:55,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828155357] [2021-11-25 18:06:55,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:55,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:06:55,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:06:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:55,480 INFO L87 Difference]: Start difference. First operand 10939 states and 14492 transitions. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:07:00,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:01,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:05,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:07,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:09,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:09,361 INFO L93 Difference]: Finished difference Result 24497 states and 32450 transitions. [2021-11-25 18:07:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:07:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 673 [2021-11-25 18:07:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:09,411 INFO L225 Difference]: With dead ends: 24497 [2021-11-25 18:07:09,411 INFO L226 Difference]: Without dead ends: 13586 [2021-11-25 18:07:09,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:09,437 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 804 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:09,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 5325 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1147 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2021-11-25 18:07:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13586 states. [2021-11-25 18:07:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13586 to 13548. [2021-11-25 18:07:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13548 states, 8594 states have (on average 1.2424947637886898) internal successors, (10678), 8766 states have internal predecessors, (10678), 3615 states have call successors, (3615), 1332 states have call predecessors, (3615), 1338 states have return successors, (3650), 3477 states have call predecessors, (3650), 3615 states have call successors, (3650) [2021-11-25 18:07:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13548 states to 13548 states and 17943 transitions. [2021-11-25 18:07:10,497 INFO L78 Accepts]: Start accepts. Automaton has 13548 states and 17943 transitions. Word has length 673 [2021-11-25 18:07:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:10,498 INFO L470 AbstractCegarLoop]: Abstraction has 13548 states and 17943 transitions. [2021-11-25 18:07:10,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:07:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 13548 states and 17943 transitions. [2021-11-25 18:07:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-11-25 18:07:10,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:10,523 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:10,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:07:10,523 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 218099440, now seen corresponding path program 1 times [2021-11-25 18:07:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213183502] [2021-11-25 18:07:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:10,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-25 18:07:11,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213183502] [2021-11-25 18:07:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213183502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:11,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:11,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:07:11,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540701306] [2021-11-25 18:07:11,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:11,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:11,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:11,284 INFO L87 Difference]: Start difference. First operand 13548 states and 17943 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:07:14,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:16,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:22,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:24,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:24,124 INFO L93 Difference]: Finished difference Result 29775 states and 39433 transitions. [2021-11-25 18:07:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:07:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 674 [2021-11-25 18:07:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:24,186 INFO L225 Difference]: With dead ends: 29775 [2021-11-25 18:07:24,186 INFO L226 Difference]: Without dead ends: 16255 [2021-11-25 18:07:24,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:24,218 INFO L933 BasicCegarLoop]: 1508 mSDtfsCounter, 806 mSDsluCounter, 4608 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 5338 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:24,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 5338 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2021-11-25 18:07:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16255 states. [2021-11-25 18:07:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16255 to 16217. [2021-11-25 18:07:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16217 states, 10304 states have (on average 1.2368982919254659) internal successors, (12745), 10511 states have internal predecessors, (12745), 4319 states have call successors, (4319), 1571 states have call predecessors, (4319), 1593 states have return successors, (4377), 4162 states have call predecessors, (4377), 4319 states have call successors, (4377) [2021-11-25 18:07:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16217 states to 16217 states and 21441 transitions. [2021-11-25 18:07:25,808 INFO L78 Accepts]: Start accepts. Automaton has 16217 states and 21441 transitions. Word has length 674 [2021-11-25 18:07:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:25,809 INFO L470 AbstractCegarLoop]: Abstraction has 16217 states and 21441 transitions. [2021-11-25 18:07:25,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:07:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 16217 states and 21441 transitions. [2021-11-25 18:07:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-11-25 18:07:25,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:25,834 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:25,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:07:25,835 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 225869159, now seen corresponding path program 1 times [2021-11-25 18:07:25,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92579039] [2021-11-25 18:07:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:25,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-25 18:07:26,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:26,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92579039] [2021-11-25 18:07:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92579039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:26,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:26,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:07:26,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756411969] [2021-11-25 18:07:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:26,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:26,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:26,451 INFO L87 Difference]: Start difference. First operand 16217 states and 21441 transitions. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-25 18:07:30,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:33,291 INFO L93 Difference]: Finished difference Result 34904 states and 46240 transitions. [2021-11-25 18:07:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:07:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 674 [2021-11-25 18:07:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:33,365 INFO L225 Difference]: With dead ends: 34904 [2021-11-25 18:07:33,365 INFO L226 Difference]: Without dead ends: 18715 [2021-11-25 18:07:33,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:33,404 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 760 mSDsluCounter, 4519 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:33,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 5220 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1146 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-25 18:07:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18715 states. [2021-11-25 18:07:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18715 to 18675. [2021-11-25 18:07:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18675 states, 11912 states have (on average 1.2327065144392209) internal successors, (14684), 12156 states have internal predecessors, (14684), 4965 states have call successors, (4965), 1759 states have call predecessors, (4965), 1797 states have return successors, (5048), 4787 states have call predecessors, (5048), 4965 states have call successors, (5048) [2021-11-25 18:07:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18675 states to 18675 states and 24697 transitions. [2021-11-25 18:07:35,370 INFO L78 Accepts]: Start accepts. Automaton has 18675 states and 24697 transitions. Word has length 674 [2021-11-25 18:07:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:35,371 INFO L470 AbstractCegarLoop]: Abstraction has 18675 states and 24697 transitions. [2021-11-25 18:07:35,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-25 18:07:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18675 states and 24697 transitions. [2021-11-25 18:07:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-11-25 18:07:35,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:35,399 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:35,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 18:07:35,399 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1691200633, now seen corresponding path program 1 times [2021-11-25 18:07:35,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682600447] [2021-11-25 18:07:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:35,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-25 18:07:36,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682600447] [2021-11-25 18:07:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682600447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:36,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:36,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:07:36,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705458214] [2021-11-25 18:07:36,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:36,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:36,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:36,004 INFO L87 Difference]: Start difference. First operand 18675 states and 24697 transitions. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:07:41,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:42,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:47,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:49,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:49,680 INFO L93 Difference]: Finished difference Result 40097 states and 53077 transitions. [2021-11-25 18:07:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:07:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 676 [2021-11-25 18:07:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:49,744 INFO L225 Difference]: With dead ends: 40097 [2021-11-25 18:07:49,744 INFO L226 Difference]: Without dead ends: 21450 [2021-11-25 18:07:49,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:49,778 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 806 mSDsluCounter, 4606 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 5335 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:49,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 5335 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1163 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2021-11-25 18:07:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21450 states. [2021-11-25 18:07:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21450 to 21412. [2021-11-25 18:07:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 13690 states have (on average 1.2285609934258583) internal successors, (16819), 13969 states have internal predecessors, (16819), 5669 states have call successors, (5669), 1998 states have call predecessors, (5669), 2052 states have return successors, (5775), 5472 states have call predecessors, (5775), 5669 states have call successors, (5775) [2021-11-25 18:07:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 28263 transitions. [2021-11-25 18:07:51,567 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 28263 transitions. Word has length 676 [2021-11-25 18:07:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:51,568 INFO L470 AbstractCegarLoop]: Abstraction has 21412 states and 28263 transitions. [2021-11-25 18:07:51,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:07:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 28263 transitions. [2021-11-25 18:07:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-11-25 18:07:51,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:51,599 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:51,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:07:51,600 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1746055294, now seen corresponding path program 1 times [2021-11-25 18:07:51,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:51,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374900004] [2021-11-25 18:07:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:51,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-25 18:07:52,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374900004] [2021-11-25 18:07:52,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374900004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:52,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:52,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:07:52,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632497063] [2021-11-25 18:07:52,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:52,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:52,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:52,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:52,281 INFO L87 Difference]: Start difference. First operand 21412 states and 28263 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-25 18:07:56,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:57,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:07:58,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:05,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:05,372 INFO L93 Difference]: Finished difference Result 45562 states and 60230 transitions. [2021-11-25 18:08:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:08:05,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 676 [2021-11-25 18:08:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:05,440 INFO L225 Difference]: With dead ends: 45562 [2021-11-25 18:08:05,440 INFO L226 Difference]: Without dead ends: 24178 [2021-11-25 18:08:05,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:05,479 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 803 mSDsluCounter, 4608 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 5337 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:05,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 5337 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-25 18:08:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24178 states. [2021-11-25 18:08:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24178 to 24140. [2021-11-25 18:08:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24140 states, 15472 states have (on average 1.2253102378490175) internal successors, (18958), 15786 states have internal predecessors, (18958), 6373 states have call successors, (6373), 2224 states have call predecessors, (6373), 2294 states have return successors, (6502), 6157 states have call predecessors, (6502), 6373 states have call successors, (6502) [2021-11-25 18:08:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24140 states to 24140 states and 31833 transitions. [2021-11-25 18:08:07,391 INFO L78 Accepts]: Start accepts. Automaton has 24140 states and 31833 transitions. Word has length 676 [2021-11-25 18:08:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:07,392 INFO L470 AbstractCegarLoop]: Abstraction has 24140 states and 31833 transitions. [2021-11-25 18:08:07,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-25 18:08:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 24140 states and 31833 transitions. [2021-11-25 18:08:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-11-25 18:08:07,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:07,418 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:07,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:08:07,418 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -916047182, now seen corresponding path program 1 times [2021-11-25 18:08:07,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:07,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152929090] [2021-11-25 18:08:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:07,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-25 18:08:07,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:07,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152929090] [2021-11-25 18:08:07,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152929090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:07,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:07,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:08:07,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447594398] [2021-11-25 18:08:07,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:07,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:08:07,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:08:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:07,998 INFO L87 Difference]: Start difference. First operand 24140 states and 31833 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:08:13,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:15,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:16,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:18,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:23,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:23,799 INFO L93 Difference]: Finished difference Result 50827 states and 67139 transitions. [2021-11-25 18:08:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:08:23,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 678 [2021-11-25 18:08:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:23,865 INFO L225 Difference]: With dead ends: 50827 [2021-11-25 18:08:23,865 INFO L226 Difference]: Without dead ends: 26715 [2021-11-25 18:08:23,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:23,906 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 786 mSDsluCounter, 4500 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 5202 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:23,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 5202 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1153 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2021-11-25 18:08:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-11-25 18:08:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 26675. [2021-11-25 18:08:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26675 states, 17144 states have (on average 1.2226434904339711) internal successors, (20961), 17495 states have internal predecessors, (20961), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2511 states have return successors, (7173), 6782 states have call predecessors, (7173), 7019 states have call successors, (7173) [2021-11-25 18:08:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26675 states to 26675 states and 35153 transitions. [2021-11-25 18:08:26,019 INFO L78 Accepts]: Start accepts. Automaton has 26675 states and 35153 transitions. Word has length 678 [2021-11-25 18:08:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:26,020 INFO L470 AbstractCegarLoop]: Abstraction has 26675 states and 35153 transitions. [2021-11-25 18:08:26,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-25 18:08:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 26675 states and 35153 transitions. [2021-11-25 18:08:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-11-25 18:08:26,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:26,044 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:26,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 18:08:26,044 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1450815549, now seen corresponding path program 1 times [2021-11-25 18:08:26,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:26,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637860000] [2021-11-25 18:08:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:26,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 2531 trivial. 0 not checked. [2021-11-25 18:08:26,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637860000] [2021-11-25 18:08:26,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637860000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013459382] [2021-11-25 18:08:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:26,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:26,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:26,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:26,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:08:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 8874 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:08:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 1220 proven. 0 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2021-11-25 18:08:30,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:08:30,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013459382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:30,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:08:30,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 18:08:30,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617033618] [2021-11-25 18:08:30,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:30,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:08:30,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:08:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:30,199 INFO L87 Difference]: Start difference. First operand 26675 states and 35153 transitions. Second operand has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (98), 3 states have call predecessors, (98), 2 states have call successors, (98) [2021-11-25 18:08:33,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:37,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:38,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:40,857 WARN L534 Checker$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 18:08:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:44,284 INFO L93 Difference]: Finished difference Result 65603 states and 88465 transitions. [2021-11-25 18:08:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:08:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (98), 3 states have call predecessors, (98), 2 states have call successors, (98) Word has length 678 [2021-11-25 18:08:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:44,370 INFO L225 Difference]: With dead ends: 65603 [2021-11-25 18:08:44,371 INFO L226 Difference]: Without dead ends: 38956 [2021-11-25 18:08:44,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:44,407 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 163 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:44,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4117 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 880 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2021-11-25 18:08:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38956 states. [2021-11-25 18:08:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38956 to 26747. [2021-11-25 18:08:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26747 states, 17198 states have (on average 1.2219444121409466) internal successors, (21015), 17549 states have internal predecessors, (21015), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2529 states have return successors, (7281), 6800 states have call predecessors, (7281), 7019 states have call successors, (7281) [2021-11-25 18:08:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26747 states to 26747 states and 35315 transitions. [2021-11-25 18:08:47,047 INFO L78 Accepts]: Start accepts. Automaton has 26747 states and 35315 transitions. Word has length 678 [2021-11-25 18:08:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:47,048 INFO L470 AbstractCegarLoop]: Abstraction has 26747 states and 35315 transitions. [2021-11-25 18:08:47,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (98), 3 states have call predecessors, (98), 2 states have call successors, (98) [2021-11-25 18:08:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 26747 states and 35315 transitions. [2021-11-25 18:08:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2021-11-25 18:08:47,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:47,073 INFO L514 BasicCegarLoop]: trace histogram [27, 22, 21, 21, 15, 15, 15, 15, 15, 15, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:47,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:47,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:47,281 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash 459018135, now seen corresponding path program 1 times [2021-11-25 18:08:47,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:47,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645525333] [2021-11-25 18:08:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:47,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2695 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 2655 trivial. 0 not checked. [2021-11-25 18:08:47,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645525333] [2021-11-25 18:08:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645525333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138225459] [2021-11-25 18:08:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:47,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:47,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:47,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:47,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:08:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 8810 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:08:49,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2695 backedges. 1266 proven. 0 refuted. 0 times theorem prover too weak. 1429 trivial. 0 not checked. [2021-11-25 18:08:50,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:08:50,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138225459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:50,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:08:50,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 18:08:50,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015901081] [2021-11-25 18:08:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:50,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:08:50,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:08:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:50,921 INFO L87 Difference]: Start difference. First operand 26747 states and 35315 transitions. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 4 states have internal predecessors, (233), 2 states have call successors, (104), 2 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-25 18:08:54,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:58,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:08:59,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:03,277 INFO L93 Difference]: Finished difference Result 65747 states and 88789 transitions. [2021-11-25 18:09:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 4 states have internal predecessors, (233), 2 states have call successors, (104), 2 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) Word has length 695 [2021-11-25 18:09:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:03,372 INFO L225 Difference]: With dead ends: 65747 [2021-11-25 18:09:03,372 INFO L226 Difference]: Without dead ends: 39028 [2021-11-25 18:09:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:03,414 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 163 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:03,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4117 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 879 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-25 18:09:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39028 states. [2021-11-25 18:09:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39028 to 26747. [2021-11-25 18:09:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26747 states, 17198 states have (on average 1.2219444121409466) internal successors, (21015), 17549 states have internal predecessors, (21015), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2529 states have return successors, (7281), 6800 states have call predecessors, (7281), 7019 states have call successors, (7281) [2021-11-25 18:09:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26747 states to 26747 states and 35315 transitions. [2021-11-25 18:09:05,894 INFO L78 Accepts]: Start accepts. Automaton has 26747 states and 35315 transitions. Word has length 695 [2021-11-25 18:09:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 26747 states and 35315 transitions. [2021-11-25 18:09:05,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 4 states have internal predecessors, (233), 2 states have call successors, (104), 2 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-25 18:09:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 26747 states and 35315 transitions. [2021-11-25 18:09:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2021-11-25 18:09:05,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:05,920 INFO L514 BasicCegarLoop]: trace histogram [28, 21, 21, 21, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:05,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:09:06,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:09:06,148 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2007283190, now seen corresponding path program 1 times [2021-11-25 18:09:06,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947723434] [2021-11-25 18:09:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:06,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2874 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 2807 trivial. 0 not checked. [2021-11-25 18:09:06,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947723434] [2021-11-25 18:09:06,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947723434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454213447] [2021-11-25 18:09:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:06,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:06,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:06,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:09:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 9091 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:09:09,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2874 backedges. 1337 proven. 0 refuted. 0 times theorem prover too weak. 1537 trivial. 0 not checked. [2021-11-25 18:09:10,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:10,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454213447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:10,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:09:10,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-25 18:09:10,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782356545] [2021-11-25 18:09:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:10,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:09:10,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:09:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:10,056 INFO L87 Difference]: Start difference. First operand 26747 states and 35315 transitions. Second operand has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 5 states have internal predecessors, (230), 2 states have call successors, (105), 2 states have call predecessors, (105), 3 states have return successors, (102), 3 states have call predecessors, (102), 2 states have call successors, (102) [2021-11-25 18:09:13,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:17,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:20,999 INFO L93 Difference]: Finished difference Result 65834 states and 88876 transitions. [2021-11-25 18:09:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:09:20,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 5 states have internal predecessors, (230), 2 states have call successors, (105), 2 states have call predecessors, (105), 3 states have return successors, (102), 3 states have call predecessors, (102), 2 states have call successors, (102) Word has length 711 [2021-11-25 18:09:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:21,116 INFO L225 Difference]: With dead ends: 65834 [2021-11-25 18:09:21,117 INFO L226 Difference]: Without dead ends: 39115 [2021-11-25 18:09:21,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:09:21,162 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 165 mSDsluCounter, 4987 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 5230 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:21,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 5230 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1105 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-25 18:09:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39115 states. [2021-11-25 18:09:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39115 to 26765. [2021-11-25 18:09:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26765 states, 17216 states have (on average 1.2217123605947955) internal successors, (21033), 17567 states have internal predecessors, (21033), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2529 states have return successors, (7281), 6800 states have call predecessors, (7281), 7019 states have call successors, (7281) [2021-11-25 18:09:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26765 states to 26765 states and 35333 transitions. [2021-11-25 18:09:23,633 INFO L78 Accepts]: Start accepts. Automaton has 26765 states and 35333 transitions. Word has length 711 [2021-11-25 18:09:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:23,634 INFO L470 AbstractCegarLoop]: Abstraction has 26765 states and 35333 transitions. [2021-11-25 18:09:23,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 5 states have internal predecessors, (230), 2 states have call successors, (105), 2 states have call predecessors, (105), 3 states have return successors, (102), 3 states have call predecessors, (102), 2 states have call successors, (102) [2021-11-25 18:09:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26765 states and 35333 transitions. [2021-11-25 18:09:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2021-11-25 18:09:23,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:23,660 INFO L514 BasicCegarLoop]: trace histogram [28, 22, 21, 21, 16, 16, 16, 16, 16, 16, 9, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:23,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 18:09:23,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:09:23,870 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:23,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:23,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1416263229, now seen corresponding path program 1 times [2021-11-25 18:09:23,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:23,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78993472] [2021-11-25 18:09:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:23,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2897 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 2853 trivial. 0 not checked. [2021-11-25 18:09:24,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78993472] [2021-11-25 18:09:24,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78993472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708776303] [2021-11-25 18:09:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:24,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:24,816 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:24,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:09:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 9301 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:09:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2897 backedges. 1398 proven. 0 refuted. 0 times theorem prover too weak. 1499 trivial. 0 not checked. [2021-11-25 18:09:28,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:28,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708776303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:28,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:09:28,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 18:09:28,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194361831] [2021-11-25 18:09:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:28,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:28,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:28,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:28,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:28,176 INFO L87 Difference]: Start difference. First operand 26765 states and 35333 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 3 states have call predecessors, (109), 2 states have call successors, (109) [2021-11-25 18:09:33,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:35,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:37,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:40,959 INFO L93 Difference]: Finished difference Result 65819 states and 88879 transitions. [2021-11-25 18:09:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 3 states have call predecessors, (109), 2 states have call successors, (109) Word has length 728 [2021-11-25 18:09:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:41,047 INFO L225 Difference]: With dead ends: 65819 [2021-11-25 18:09:41,047 INFO L226 Difference]: Without dead ends: 39082 [2021-11-25 18:09:41,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:41,087 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 164 mSDsluCounter, 3691 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:41,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 4147 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 867 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-25 18:09:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39082 states. [2021-11-25 18:09:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39082 to 26837. [2021-11-25 18:09:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26837 states, 17270 states have (on average 1.2210191082802548) internal successors, (21087), 17621 states have internal predecessors, (21087), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2547 states have return successors, (7389), 6818 states have call predecessors, (7389), 7019 states have call successors, (7389) [2021-11-25 18:09:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26837 states to 26837 states and 35495 transitions. [2021-11-25 18:09:43,998 INFO L78 Accepts]: Start accepts. Automaton has 26837 states and 35495 transitions. Word has length 728 [2021-11-25 18:09:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:43,998 INFO L470 AbstractCegarLoop]: Abstraction has 26837 states and 35495 transitions. [2021-11-25 18:09:43,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 3 states have call predecessors, (109), 2 states have call successors, (109) [2021-11-25 18:09:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 26837 states and 35495 transitions. [2021-11-25 18:09:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2021-11-25 18:09:44,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:44,017 INFO L514 BasicCegarLoop]: trace histogram [29, 21, 21, 20, 17, 17, 17, 17, 17, 17, 10, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:44,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:44,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:44,225 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash -236349097, now seen corresponding path program 1 times [2021-11-25 18:09:44,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:44,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325486969] [2021-11-25 18:09:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:44,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3057 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 2985 trivial. 0 not checked. [2021-11-25 18:09:44,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325486969] [2021-11-25 18:09:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325486969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610453552] [2021-11-25 18:09:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:44,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:44,974 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:44,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:09:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 9381 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:09:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3057 backedges. 1452 proven. 0 refuted. 0 times theorem prover too weak. 1605 trivial. 0 not checked. [2021-11-25 18:09:48,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:48,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610453552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:48,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:09:48,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 18:09:48,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810804197] [2021-11-25 18:09:48,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:48,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:48,576 INFO L87 Difference]: Start difference. First operand 26837 states and 35495 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 4 states have internal predecessors, (238), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-25 18:09:54,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:57,937 INFO L93 Difference]: Finished difference Result 65963 states and 89203 transitions. [2021-11-25 18:09:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 4 states have internal predecessors, (238), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) Word has length 743 [2021-11-25 18:09:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:58,033 INFO L225 Difference]: With dead ends: 65963 [2021-11-25 18:09:58,033 INFO L226 Difference]: Without dead ends: 39154 [2021-11-25 18:09:58,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:58,074 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 164 mSDsluCounter, 3688 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:58,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 4147 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 863 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 18:09:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39154 states. [2021-11-25 18:10:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39154 to 26837. [2021-11-25 18:10:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26837 states, 17270 states have (on average 1.2210191082802548) internal successors, (21087), 17621 states have internal predecessors, (21087), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2547 states have return successors, (7389), 6818 states have call predecessors, (7389), 7019 states have call successors, (7389) [2021-11-25 18:10:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26837 states to 26837 states and 35495 transitions. [2021-11-25 18:10:00,907 INFO L78 Accepts]: Start accepts. Automaton has 26837 states and 35495 transitions. Word has length 743 [2021-11-25 18:10:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:00,907 INFO L470 AbstractCegarLoop]: Abstraction has 26837 states and 35495 transitions. [2021-11-25 18:10:00,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 4 states have internal predecessors, (238), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-25 18:10:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 26837 states and 35495 transitions. [2021-11-25 18:10:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2021-11-25 18:10:00,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:00,926 INFO L514 BasicCegarLoop]: trace histogram [30, 21, 21, 20, 18, 18, 18, 18, 18, 18, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:00,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:01,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:10:01,127 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:01,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:01,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1143750166, now seen corresponding path program 1 times [2021-11-25 18:10:01,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:01,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468205361] [2021-11-25 18:10:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:01,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3260 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 3185 trivial. 0 not checked. [2021-11-25 18:10:01,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468205361] [2021-11-25 18:10:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468205361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741294801] [2021-11-25 18:10:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:01,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:01,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:01,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:10:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 9590 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:10:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3260 backedges. 1527 proven. 0 refuted. 0 times theorem prover too weak. 1733 trivial. 0 not checked. [2021-11-25 18:10:05,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:05,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741294801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:05,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:10:05,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-25 18:10:05,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903393208] [2021-11-25 18:10:05,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:05,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:10:05,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:10:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:10:05,367 INFO L87 Difference]: Start difference. First operand 26837 states and 35495 transitions. Second operand has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 5 states have internal predecessors, (239), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-25 18:10:12,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:14,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:15,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:20,467 INFO L93 Difference]: Finished difference Result 65996 states and 89146 transitions. [2021-11-25 18:10:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:10:20,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 5 states have internal predecessors, (239), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) Word has length 760 [2021-11-25 18:10:20,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:20,561 INFO L225 Difference]: With dead ends: 65996 [2021-11-25 18:10:20,561 INFO L226 Difference]: Without dead ends: 39187 [2021-11-25 18:10:20,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:10:20,608 INFO L933 BasicCegarLoop]: 1091 mSDtfsCounter, 166 mSDsluCounter, 5024 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 5265 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:20,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 5265 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1096 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2021-11-25 18:10:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39187 states. [2021-11-25 18:10:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39187 to 26801. [2021-11-25 18:10:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26801 states, 17252 states have (on average 1.22124971017853) internal successors, (21069), 17585 states have internal predecessors, (21069), 7019 states have call successors, (7019), 2425 states have call predecessors, (7019), 2529 states have return successors, (7281), 6818 states have call predecessors, (7281), 7019 states have call successors, (7281) [2021-11-25 18:10:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26801 states to 26801 states and 35369 transitions. [2021-11-25 18:10:23,454 INFO L78 Accepts]: Start accepts. Automaton has 26801 states and 35369 transitions. Word has length 760 [2021-11-25 18:10:23,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:23,455 INFO L470 AbstractCegarLoop]: Abstraction has 26801 states and 35369 transitions. [2021-11-25 18:10:23,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 5 states have internal predecessors, (239), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-25 18:10:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 26801 states and 35369 transitions. [2021-11-25 18:10:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-11-25 18:10:23,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:23,474 INFO L514 BasicCegarLoop]: trace histogram [30, 21, 21, 21, 18, 18, 18, 18, 18, 18, 12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:23,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:23,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 18:10:23,685 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash -330530767, now seen corresponding path program 2 times [2021-11-25 18:10:23,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:23,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619857251] [2021-11-25 18:10:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:23,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3304 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 3254 trivial. 0 not checked. [2021-11-25 18:10:24,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:24,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619857251] [2021-11-25 18:10:24,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619857251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:24,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972353241] [2021-11-25 18:10:24,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:10:24,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:24,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:24,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:24,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:10:26,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 18:10:26,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:10:26,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:10:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3304 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3282 trivial. 0 not checked. [2021-11-25 18:10:27,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:27,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972353241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:27,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:10:27,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 18:10:27,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588226517] [2021-11-25 18:10:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:27,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:27,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:10:27,422 INFO L87 Difference]: Start difference. First operand 26801 states and 35369 transitions. Second operand has 5 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 3 states have call successors, (104), 3 states have call predecessors, (104), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-25 18:10:31,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:33,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:35,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:36,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:40,555 INFO L93 Difference]: Finished difference Result 49776 states and 66917 transitions. [2021-11-25 18:10:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 3 states have call successors, (104), 3 states have call predecessors, (104), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 777 [2021-11-25 18:10:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:40,640 INFO L225 Difference]: With dead ends: 49776 [2021-11-25 18:10:40,640 INFO L226 Difference]: Without dead ends: 34722 [2021-11-25 18:10:40,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:10:40,666 INFO L933 BasicCegarLoop]: 1265 mSDtfsCounter, 272 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 4721 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:40,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 4721 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 994 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2021-11-25 18:10:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34722 states. [2021-11-25 18:10:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34722 to 26837. [2021-11-25 18:10:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26837 states, 17279 states have (on average 1.2209039874992766) internal successors, (21096), 17612 states have internal predecessors, (21096), 7019 states have call successors, (7019), 2434 states have call predecessors, (7019), 2538 states have return successors, (7281), 6818 states have call predecessors, (7281), 7019 states have call successors, (7281) [2021-11-25 18:10:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26837 states to 26837 states and 35396 transitions. [2021-11-25 18:10:43,318 INFO L78 Accepts]: Start accepts. Automaton has 26837 states and 35396 transitions. Word has length 777 [2021-11-25 18:10:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:43,319 INFO L470 AbstractCegarLoop]: Abstraction has 26837 states and 35396 transitions. [2021-11-25 18:10:43,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 3 states have call successors, (104), 3 states have call predecessors, (104), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-25 18:10:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26837 states and 35396 transitions. [2021-11-25 18:10:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2021-11-25 18:10:43,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:43,337 INFO L514 BasicCegarLoop]: trace histogram [30, 21, 21, 20, 18, 18, 18, 18, 18, 18, 12, 11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:43,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 18:10:43,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:10:43,538 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash 513505699, now seen corresponding path program 1 times [2021-11-25 18:10:43,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:43,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619906983] [2021-11-25 18:10:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:43,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3316 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-11-25 18:10:44,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619906983] [2021-11-25 18:10:44,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619906983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:44,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476889349] [2021-11-25 18:10:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:44,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:44,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:44,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:44,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa82d3b7-63ea-4d5e-8b8f-9fa5a8bfe5b7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:10:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 9872 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:10:47,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3316 backedges. 1534 proven. 0 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2021-11-25 18:10:48,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:48,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476889349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:48,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:10:48,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-25 18:10:48,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785353923] [2021-11-25 18:10:48,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:48,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:48,528 INFO L87 Difference]: Start difference. First operand 26837 states and 35396 transitions. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (106), 3 states have call predecessors, (106), 2 states have call successors, (106) [2021-11-25 18:10:53,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:54,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:58,740 INFO L93 Difference]: Finished difference Result 65927 states and 88951 transitions. [2021-11-25 18:10:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (106), 3 states have call predecessors, (106), 2 states have call successors, (106) Word has length 776 [2021-11-25 18:10:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:58,864 INFO L225 Difference]: With dead ends: 65927 [2021-11-25 18:10:58,864 INFO L226 Difference]: Without dead ends: 39118 [2021-11-25 18:10:58,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:58,930 INFO L933 BasicCegarLoop]: 1082 mSDtfsCounter, 163 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4144 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:58,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4144 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-25 18:10:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states.