./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-pegasus.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_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/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_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/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-pegasus.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/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_4d053f37-800b-4d97-ade2-7b5b36caafbc/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 97d835cf94d1b164c94e454298c9901161d3451d2aec7fccfb9f6ea65c4976ed --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:21:33,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:21:33,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:21:33,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:21:33,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:21:33,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:21:33,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:21:33,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:21:33,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:21:33,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:21:33,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:21:33,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:21:33,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:21:33,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:21:33,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:21:33,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:21:33,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:21:33,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:21:33,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:21:33,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:21:33,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:21:33,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:21:33,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:21:33,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:21:33,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:21:33,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:21:33,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:21:33,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:21:33,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:21:33,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:21:33,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:21:33,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:21:33,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:21:33,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:21:33,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:21:33,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:21:33,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:21:33,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:21:33,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:21:33,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:21:33,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:21:33,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:21:33,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:21:33,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:21:33,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:21:33,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:21:33,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:21:33,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:21:33,625 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:21:33,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:21:33,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:21:33,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:21:33,626 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:21:33,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:21:33,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:21:33,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:21:33,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:21:33,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:21:33,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:21:33,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:21:33,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:21:33,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:21:33,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:21:33,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:21:33,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:21:33,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:21:33,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:21:33,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:21:33,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:21:33,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:21:33,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:21:33,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:33,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:21:33,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:21:33,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:21:33,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:21:33,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:21:33,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:21:33,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:21:33,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:21:33,635 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_4d053f37-800b-4d97-ade2-7b5b36caafbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97d835cf94d1b164c94e454298c9901161d3451d2aec7fccfb9f6ea65c4976ed [2021-11-25 20:21:33,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:21:33,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:21:33,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:21:33,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:21:33,910 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:21:33,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i [2021-11-25 20:21:33,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/data/38bf892b9/cdb44221816e42868f7401877b4d852f/FLAGf25478023 [2021-11-25 20:21:34,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:21:34,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i [2021-11-25 20:21:34,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/data/38bf892b9/cdb44221816e42868f7401877b4d852f/FLAGf25478023 [2021-11-25 20:21:35,296 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/data/38bf892b9/cdb44221816e42868f7401877b4d852f [2021-11-25 20:21:35,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:21:35,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:21:35,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:35,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:21:35,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:21:35,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:35" (1/1) ... [2021-11-25 20:21:35,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414af842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:35, skipping insertion in model container [2021-11-25 20:21:35,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:35" (1/1) ... [2021-11-25 20:21:35,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:21:35,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:21:38,063 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_4d053f37-800b-4d97-ade2-7b5b36caafbc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327451,327464] [2021-11-25 20:21:38,072 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_4d053f37-800b-4d97-ade2-7b5b36caafbc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327596,327609] [2021-11-25 20:21:38,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:38,172 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:21:38,597 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_4d053f37-800b-4d97-ade2-7b5b36caafbc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327451,327464] [2021-11-25 20:21:38,598 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_4d053f37-800b-4d97-ade2-7b5b36caafbc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327596,327609] [2021-11-25 20:21:38,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:38,874 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:21:38,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38 WrapperNode [2021-11-25 20:21:38,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:38,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:38,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:21:38,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:21:38,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,291 INFO L137 Inliner]: procedures = 393, calls = 3228, calls flagged for inlining = 185, calls inlined = 165, statements flattened = 5478 [2021-11-25 20:21:39,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:39,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:21:39,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:21:39,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:21:39,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:21:39,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:21:39,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:21:39,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:21:39,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (1/1) ... [2021-11-25 20:21:39,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:39,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:21:39,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:21:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:21:39,684 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:21:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-25 20:21:39,684 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-25 20:21:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:21:39,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:21:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2021-11-25 20:21:39,685 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2021-11-25 20:21:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure set_carrier [2021-11-25 20:21:39,685 INFO L138 BoogieDeclarations]: Found implementation of procedure set_carrier [2021-11-25 20:21:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure read_mii_word [2021-11-25 20:21:39,685 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mii_word [2021-11-25 20:21:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 20:21:39,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 20:21:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 20:21:39,686 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 20:21:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 20:21:39,686 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 20:21:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:21:39,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:21:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:21:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-25 20:21:39,687 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-25 20:21:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_dec_workqueue [2021-11-25 20:21:39,688 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_dec_workqueue [2021-11-25 20:21:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 20:21:39,688 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 20:21:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_disconnect [2021-11-25 20:21:39,688 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_disconnect [2021-11-25 20:21:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:21:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2021-11-25 20:21:39,689 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2021-11-25 20:21:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:21:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure __mii_op [2021-11-25 20:21:39,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __mii_op [2021-11-25 20:21:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 20:21:39,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 20:21:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:21:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-25 20:21:39,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-25 20:21:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:21:39,691 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:21:39,691 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_set_wol [2021-11-25 20:21:39,691 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_set_wol [2021-11-25 20:21:39,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 20:21:39,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 20:21:39,692 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-25 20:21:39,692 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-25 20:21:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-25 20:21:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-25 20:21:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_set_multicast [2021-11-25 20:21:39,694 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_set_multicast [2021-11-25 20:21:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure set_register [2021-11-25 20:21:39,694 INFO L138 BoogieDeclarations]: Found implementation of procedure set_register [2021-11-25 20:21:39,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:21:39,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 20:21:39,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 20:21:39,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:21:39,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 20:21:39,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 20:21:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:21:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:21:39,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:21:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-25 20:21:39,696 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-25 20:21:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-25 20:21:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-25 20:21:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-25 20:21:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-25 20:21:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-25 20:21:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-25 20:21:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-25 20:21:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-25 20:21:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 20:21:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 20:21:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2021-11-25 20:21:39,699 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2021-11-25 20:21:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:21:39,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:21:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure read_bulk_callback [2021-11-25 20:21:39,700 INFO L138 BoogieDeclarations]: Found implementation of procedure read_bulk_callback [2021-11-25 20:21:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-25 20:21:39,700 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-25 20:21:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:21:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:21:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:21:39,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:21:39,702 INFO L130 BoogieDeclarations]: Found specification of procedure write_mii_word [2021-11-25 20:21:39,702 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mii_word [2021-11-25 20:21:39,702 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-25 20:21:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-25 20:21:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-25 20:21:39,704 INFO L138 BoogieDeclarations]: Found implementation of procedure strsep [2021-11-25 20:21:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 20:21:39,704 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 20:21:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_open [2021-11-25 20:21:39,705 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_open [2021-11-25 20:21:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 20:21:39,705 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 20:21:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-25 20:21:39,705 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-25 20:21:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:21:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure read_eprom_word [2021-11-25 20:21:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure read_eprom_word [2021-11-25 20:21:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 20:21:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 20:21:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:21:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_nway_reset [2021-11-25 20:21:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_nway_reset [2021-11-25 20:21:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_resume [2021-11-25 20:21:39,710 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_resume [2021-11-25 20:21:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:21:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_tx_timeout [2021-11-25 20:21:39,711 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_tx_timeout [2021-11-25 20:21:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 20:21:39,713 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 20:21:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-25 20:21:39,713 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-25 20:21:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure free_all_urbs [2021-11-25 20:21:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure free_all_urbs [2021-11-25 20:21:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 20:21:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 20:21:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 20:21:39,721 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 20:21:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 20:21:39,721 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 20:21:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure intr_callback [2021-11-25 20:21:39,721 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_callback [2021-11-25 20:21:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb_ip_align [2021-11-25 20:21:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb_ip_align [2021-11-25 20:21:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-25 20:21:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-25 20:21:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 20:21:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 20:21:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_pegasus_exit_11_2 [2021-11-25 20:21:39,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_pegasus_exit_11_2 [2021-11-25 20:21:39,723 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:21:39,723 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:21:39,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:21:39,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:21:39,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:21:39,723 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 20:21:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 20:21:39,724 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2021-11-25 20:21:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2021-11-25 20:21:39,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 20:21:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 20:21:39,724 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_close [2021-11-25 20:21:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_close [2021-11-25 20:21:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure get_registers [2021-11-25 20:21:39,725 INFO L138 BoogieDeclarations]: Found implementation of procedure get_registers [2021-11-25 20:21:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-25 20:21:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2021-11-25 20:21:39,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2021-11-25 20:21:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:21:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure set_registers [2021-11-25 20:21:39,726 INFO L138 BoogieDeclarations]: Found implementation of procedure set_registers [2021-11-25 20:21:39,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 20:21:39,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 20:21:40,576 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:21:40,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:21:41,139 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:21:46,307 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 20:21:46,691 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:21:47,602 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:21:47,603 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:21:47,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:47 BoogieIcfgContainer [2021-11-25 20:21:47,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:21:47,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:21:47,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:21:47,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:21:47,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:21:35" (1/3) ... [2021-11-25 20:21:47,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98a3faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:47, skipping insertion in model container [2021-11-25 20:21:47,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:38" (2/3) ... [2021-11-25 20:21:47,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98a3faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:47, skipping insertion in model container [2021-11-25 20:21:47,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:47" (3/3) ... [2021-11-25 20:21:47,616 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i [2021-11-25 20:21:47,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:21:47,626 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:21:47,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:21:47,710 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:21:47,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:21:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 1028 states, 635 states have (on average 1.325984251968504) internal successors, (842), 643 states have internal predecessors, (842), 322 states have call successors, (322), 71 states have call predecessors, (322), 70 states have return successors, (316), 314 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-25 20:21:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:21:47,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:47,786 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:47,786 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1036566588, now seen corresponding path program 1 times [2021-11-25 20:21:47,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:47,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209411567] [2021-11-25 20:21:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:47,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-25 20:21:48,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209411567] [2021-11-25 20:21:48,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209411567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:48,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:48,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:48,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600874336] [2021-11-25 20:21:48,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:48,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:48,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:48,818 INFO L87 Difference]: Start difference. First operand has 1028 states, 635 states have (on average 1.325984251968504) internal successors, (842), 643 states have internal predecessors, (842), 322 states have call successors, (322), 71 states have call predecessors, (322), 70 states have return successors, (316), 314 states have call predecessors, (316), 316 states have call successors, (316) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:21:53,081 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 20:21:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:53,206 INFO L93 Difference]: Finished difference Result 2868 states and 4163 transitions. [2021-11-25 20:21:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 144 [2021-11-25 20:21:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:53,245 INFO L225 Difference]: With dead ends: 2868 [2021-11-25 20:21:53,245 INFO L226 Difference]: Without dead ends: 1800 [2021-11-25 20:21:53,265 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 20:21:53,269 INFO L933 BasicCegarLoop]: 1545 mSDtfsCounter, 1193 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:53,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 2785 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 20:21:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-11-25 20:21:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1796. [2021-11-25 20:21:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1134 states have (on average 1.3209876543209877) internal successors, (1498), 1144 states have internal predecessors, (1498), 528 states have call successors, (528), 133 states have call predecessors, (528), 133 states have return successors, (528), 524 states have call predecessors, (528), 528 states have call successors, (528) [2021-11-25 20:21:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2554 transitions. [2021-11-25 20:21:53,485 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2554 transitions. Word has length 144 [2021-11-25 20:21:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:53,486 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 2554 transitions. [2021-11-25 20:21:53,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:21:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2554 transitions. [2021-11-25 20:21:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-25 20:21:53,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:53,494 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:53,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:21:53,495 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash -210135046, now seen corresponding path program 1 times [2021-11-25 20:21:53,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087124107] [2021-11-25 20:21:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:53,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-25 20:21:54,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:54,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087124107] [2021-11-25 20:21:54,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087124107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:54,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:54,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:54,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312980664] [2021-11-25 20:21:54,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:54,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:54,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:54,041 INFO L87 Difference]: Start difference. First operand 1796 states and 2554 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:21:58,300 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 20:21:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:58,424 INFO L93 Difference]: Finished difference Result 4401 states and 6245 transitions. [2021-11-25 20:21:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2021-11-25 20:21:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:58,447 INFO L225 Difference]: With dead ends: 4401 [2021-11-25 20:21:58,448 INFO L226 Difference]: Without dead ends: 2630 [2021-11-25 20:21:58,456 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 20:21:58,458 INFO L933 BasicCegarLoop]: 1301 mSDtfsCounter, 591 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:58,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 2458 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 497 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:21:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-11-25 20:21:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2624. [2021-11-25 20:21:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 1685 states have (on average 1.3299703264094955) internal successors, (2241), 1705 states have internal predecessors, (2241), 730 states have call successors, (730), 208 states have call predecessors, (730), 208 states have return successors, (730), 719 states have call predecessors, (730), 730 states have call successors, (730) [2021-11-25 20:21:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3701 transitions. [2021-11-25 20:21:58,626 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3701 transitions. Word has length 161 [2021-11-25 20:21:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:58,627 INFO L470 AbstractCegarLoop]: Abstraction has 2624 states and 3701 transitions. [2021-11-25 20:21:58,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:21:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3701 transitions. [2021-11-25 20:21:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 20:21:58,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:58,632 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:58,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:21:58,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1802838622, now seen corresponding path program 1 times [2021-11-25 20:21:58,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:58,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163656285] [2021-11-25 20:21:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:58,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-25 20:21:59,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163656285] [2021-11-25 20:21:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163656285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:59,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920713404] [2021-11-25 20:21:59,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:59,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:59,012 INFO L87 Difference]: Start difference. First operand 2624 states and 3701 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:22:02,025 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 20:22:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:03,423 INFO L93 Difference]: Finished difference Result 6814 states and 9561 transitions. [2021-11-25 20:22:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 158 [2021-11-25 20:22:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:03,460 INFO L225 Difference]: With dead ends: 6814 [2021-11-25 20:22:03,460 INFO L226 Difference]: Without dead ends: 4215 [2021-11-25 20:22:03,472 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 20:22:03,476 INFO L933 BasicCegarLoop]: 1383 mSDtfsCounter, 929 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 2519 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:03,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 2519 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 494 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 20:22:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-11-25 20:22:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 4211. [2021-11-25 20:22:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 2698 states have (on average 1.3113417346182357) internal successors, (3538), 2732 states have internal predecessors, (3538), 1165 states have call successors, (1165), 347 states have call predecessors, (1165), 347 states have return successors, (1171), 1142 states have call predecessors, (1171), 1165 states have call successors, (1171) [2021-11-25 20:22:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 5874 transitions. [2021-11-25 20:22:03,718 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 5874 transitions. Word has length 158 [2021-11-25 20:22:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:03,719 INFO L470 AbstractCegarLoop]: Abstraction has 4211 states and 5874 transitions. [2021-11-25 20:22:03,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:22:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 5874 transitions. [2021-11-25 20:22:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-25 20:22:03,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:03,723 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 12, 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] [2021-11-25 20:22:03,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:22:03,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash -605742417, now seen corresponding path program 1 times [2021-11-25 20:22:03,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:03,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680158471] [2021-11-25 20:22:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:03,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-25 20:22:04,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:04,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680158471] [2021-11-25 20:22:04,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680158471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:04,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:04,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:04,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069837996] [2021-11-25 20:22:04,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:04,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:04,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:04,141 INFO L87 Difference]: Start difference. First operand 4211 states and 5874 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:22:08,210 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 20:22:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:09,107 INFO L93 Difference]: Finished difference Result 12427 states and 17306 transitions. [2021-11-25 20:22:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 162 [2021-11-25 20:22:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:09,181 INFO L225 Difference]: With dead ends: 12427 [2021-11-25 20:22:09,181 INFO L226 Difference]: Without dead ends: 8241 [2021-11-25 20:22:09,203 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 20:22:09,208 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 1168 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 2782 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:09,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 2782 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 544 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 20:22:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8241 states. [2021-11-25 20:22:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8241 to 8223. [2021-11-25 20:22:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8223 states, 5276 states have (on average 1.310841546626232) internal successors, (6916), 5348 states have internal predecessors, (6916), 2254 states have call successors, (2254), 692 states have call predecessors, (2254), 692 states have return successors, (2266), 2201 states have call predecessors, (2266), 2254 states have call successors, (2266) [2021-11-25 20:22:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 11436 transitions. [2021-11-25 20:22:09,865 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 11436 transitions. Word has length 162 [2021-11-25 20:22:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:09,866 INFO L470 AbstractCegarLoop]: Abstraction has 8223 states and 11436 transitions. [2021-11-25 20:22:09,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:22:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 11436 transitions. [2021-11-25 20:22:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 20:22:09,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:09,874 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 12, 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] [2021-11-25 20:22:09,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:22:09,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:09,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1861902497, now seen corresponding path program 1 times [2021-11-25 20:22:09,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:09,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428133740] [2021-11-25 20:22:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:09,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-25 20:22:10,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:10,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428133740] [2021-11-25 20:22:10,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428133740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:10,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:10,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:10,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435754040] [2021-11-25 20:22:10,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:10,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:10,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:10,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:10,159 INFO L87 Difference]: Start difference. First operand 8223 states and 11436 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:22:14,281 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 20:22:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:14,875 INFO L93 Difference]: Finished difference Result 17333 states and 23982 transitions. [2021-11-25 20:22:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:14,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 175 [2021-11-25 20:22:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:14,948 INFO L225 Difference]: With dead ends: 17333 [2021-11-25 20:22:14,948 INFO L226 Difference]: Without dead ends: 9135 [2021-11-25 20:22:14,986 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 20:22:14,987 INFO L933 BasicCegarLoop]: 1357 mSDtfsCounter, 860 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:14,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 2476 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 20:22:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9135 states. [2021-11-25 20:22:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9135 to 9133. [2021-11-25 20:22:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9133 states, 5836 states have (on average 1.3012337217272105) internal successors, (7594), 5910 states have internal predecessors, (7594), 2484 states have call successors, (2484), 812 states have call predecessors, (2484), 812 states have return successors, (2496), 2429 states have call predecessors, (2496), 2484 states have call successors, (2496) [2021-11-25 20:22:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9133 states to 9133 states and 12574 transitions. [2021-11-25 20:22:15,431 INFO L78 Accepts]: Start accepts. Automaton has 9133 states and 12574 transitions. Word has length 175 [2021-11-25 20:22:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:15,432 INFO L470 AbstractCegarLoop]: Abstraction has 9133 states and 12574 transitions. [2021-11-25 20:22:15,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:22:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 9133 states and 12574 transitions. [2021-11-25 20:22:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-25 20:22:15,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:15,436 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 12, 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] [2021-11-25 20:22:15,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:22:15,437 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1557391182, now seen corresponding path program 1 times [2021-11-25 20:22:15,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:15,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455946738] [2021-11-25 20:22:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:15,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-25 20:22:15,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:15,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455946738] [2021-11-25 20:22:15,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455946738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:15,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:15,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:15,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037115638] [2021-11-25 20:22:15,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:15,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:15,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:15,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:15,757 INFO L87 Difference]: Start difference. First operand 9133 states and 12574 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:22:19,803 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 20:22:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:20,597 INFO L93 Difference]: Finished difference Result 19994 states and 27459 transitions. [2021-11-25 20:22:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 179 [2021-11-25 20:22:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:20,677 INFO L225 Difference]: With dead ends: 19994 [2021-11-25 20:22:20,678 INFO L226 Difference]: Without dead ends: 10886 [2021-11-25 20:22:20,713 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 20:22:20,714 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 587 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:20,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 2751 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 575 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 20:22:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10886 states. [2021-11-25 20:22:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10886 to 10876. [2021-11-25 20:22:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10876 states, 7036 states have (on average 1.3031552018192154) internal successors, (9169), 7140 states have internal predecessors, (9169), 2857 states have call successors, (2857), 982 states have call predecessors, (2857), 982 states have return successors, (2869), 2780 states have call predecessors, (2869), 2857 states have call successors, (2869) [2021-11-25 20:22:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 14895 transitions. [2021-11-25 20:22:21,298 INFO L78 Accepts]: Start accepts. Automaton has 10876 states and 14895 transitions. Word has length 179 [2021-11-25 20:22:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:21,299 INFO L470 AbstractCegarLoop]: Abstraction has 10876 states and 14895 transitions. [2021-11-25 20:22:21,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:22:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10876 states and 14895 transitions. [2021-11-25 20:22:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-25 20:22:21,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:21,305 INFO L514 BasicCegarLoop]: trace histogram [18, 12, 12, 12, 12, 12, 12, 5, 5, 4, 4, 4, 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] [2021-11-25 20:22:21,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:22:21,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -881142365, now seen corresponding path program 1 times [2021-11-25 20:22:21,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340660214] [2021-11-25 20:22:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:21,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-25 20:22:21,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:21,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340660214] [2021-11-25 20:22:21,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340660214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:21,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:21,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:21,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403067111] [2021-11-25 20:22:21,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:21,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:21,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:21,822 INFO L87 Difference]: Start difference. First operand 10876 states and 14895 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 20:22:25,628 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 20:22:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:26,540 INFO L93 Difference]: Finished difference Result 30644 states and 42019 transitions. [2021-11-25 20:22:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:26,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 219 [2021-11-25 20:22:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:26,621 INFO L225 Difference]: With dead ends: 30644 [2021-11-25 20:22:26,621 INFO L226 Difference]: Without dead ends: 19834 [2021-11-25 20:22:26,651 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 20:22:26,652 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 1105 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:26,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 2789 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 570 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:22:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19834 states. [2021-11-25 20:22:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19834 to 19832. [2021-11-25 20:22:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19832 states, 12936 states have (on average 1.3071273964131107) internal successors, (16909), 13108 states have internal predecessors, (16909), 5101 states have call successors, (5101), 1794 states have call predecessors, (5101), 1794 states have return successors, (5125), 4980 states have call predecessors, (5125), 5101 states have call successors, (5125) [2021-11-25 20:22:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19832 states to 19832 states and 27135 transitions. [2021-11-25 20:22:27,605 INFO L78 Accepts]: Start accepts. Automaton has 19832 states and 27135 transitions. Word has length 219 [2021-11-25 20:22:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:27,606 INFO L470 AbstractCegarLoop]: Abstraction has 19832 states and 27135 transitions. [2021-11-25 20:22:27,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 20:22:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19832 states and 27135 transitions. [2021-11-25 20:22:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-25 20:22:27,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:27,613 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1] [2021-11-25 20:22:27,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:22:27,613 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1709640497, now seen corresponding path program 1 times [2021-11-25 20:22:27,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:27,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621095284] [2021-11-25 20:22:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:27,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2021-11-25 20:22:27,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621095284] [2021-11-25 20:22:27,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621095284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:27,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:27,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:27,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970901829] [2021-11-25 20:22:27,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:27,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:27,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:27,903 INFO L87 Difference]: Start difference. First operand 19832 states and 27135 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 20:22:31,005 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 20:22:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:32,960 INFO L93 Difference]: Finished difference Result 44066 states and 60244 transitions. [2021-11-25 20:22:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 228 [2021-11-25 20:22:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:33,076 INFO L225 Difference]: With dead ends: 44066 [2021-11-25 20:22:33,076 INFO L226 Difference]: Without dead ends: 24300 [2021-11-25 20:22:33,127 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 20:22:33,128 INFO L933 BasicCegarLoop]: 1653 mSDtfsCounter, 690 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:33,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 2748 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 622 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 20:22:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-11-25 20:22:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 24265. [2021-11-25 20:22:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24265 states, 15880 states have (on average 1.3071158690176323) internal successors, (20757), 16124 states have internal predecessors, (20757), 6109 states have call successors, (6109), 2275 states have call predecessors, (6109), 2275 states have return successors, (6133), 5931 states have call predecessors, (6133), 6109 states have call successors, (6133) [2021-11-25 20:22:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24265 states to 24265 states and 32999 transitions. [2021-11-25 20:22:34,468 INFO L78 Accepts]: Start accepts. Automaton has 24265 states and 32999 transitions. Word has length 228 [2021-11-25 20:22:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:34,469 INFO L470 AbstractCegarLoop]: Abstraction has 24265 states and 32999 transitions. [2021-11-25 20:22:34,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 20:22:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24265 states and 32999 transitions. [2021-11-25 20:22:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-25 20:22:34,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:34,477 INFO L514 BasicCegarLoop]: trace histogram [20, 12, 12, 12, 12, 12, 12, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:34,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:22:34,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1088761898, now seen corresponding path program 1 times [2021-11-25 20:22:34,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:34,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351882918] [2021-11-25 20:22:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:34,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2021-11-25 20:22:35,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351882918] [2021-11-25 20:22:35,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351882918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:35,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:35,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:22:35,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223492497] [2021-11-25 20:22:35,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:35,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:22:35,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:22:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:22:35,094 INFO L87 Difference]: Start difference. First operand 24265 states and 32999 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:22:39,003 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 20:22:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:44,008 INFO L93 Difference]: Finished difference Result 32725 states and 44419 transitions. [2021-11-25 20:22:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:22:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 238 [2021-11-25 20:22:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:44,141 INFO L225 Difference]: With dead ends: 32725 [2021-11-25 20:22:44,142 INFO L226 Difference]: Without dead ends: 32723 [2021-11-25 20:22:44,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:22:44,155 INFO L933 BasicCegarLoop]: 1432 mSDtfsCounter, 896 mSDsluCounter, 5963 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 6461 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:44,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 6461 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1609 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-25 20:22:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32723 states. [2021-11-25 20:22:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32723 to 32563. [2021-11-25 20:22:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32563 states, 21302 states have (on average 1.2928363533940475) internal successors, (27540), 21646 states have internal predecessors, (27540), 8173 states have call successors, (8173), 3087 states have call predecessors, (8173), 3087 states have return successors, (8197), 7911 states have call predecessors, (8197), 8173 states have call successors, (8197) [2021-11-25 20:22:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32563 states to 32563 states and 43910 transitions. [2021-11-25 20:22:45,892 INFO L78 Accepts]: Start accepts. Automaton has 32563 states and 43910 transitions. Word has length 238 [2021-11-25 20:22:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:45,894 INFO L470 AbstractCegarLoop]: Abstraction has 32563 states and 43910 transitions. [2021-11-25 20:22:45,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:22:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32563 states and 43910 transitions. [2021-11-25 20:22:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-11-25 20:22:45,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:45,939 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:22:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:22:45,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1236286767, now seen corresponding path program 1 times [2021-11-25 20:22:45,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827947497] [2021-11-25 20:22:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:45,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2021-11-25 20:22:46,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:46,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827947497] [2021-11-25 20:22:46,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827947497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:46,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:46,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:46,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467694860] [2021-11-25 20:22:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:46,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:46,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:46,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:46,792 INFO L87 Difference]: Start difference. First operand 32563 states and 43910 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-25 20:22:49,649 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 20:22:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:53,150 INFO L93 Difference]: Finished difference Result 95980 states and 129474 transitions. [2021-11-25 20:22:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 445 [2021-11-25 20:22:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:53,391 INFO L225 Difference]: With dead ends: 95980 [2021-11-25 20:22:53,391 INFO L226 Difference]: Without dead ends: 63501 [2021-11-25 20:22:53,466 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 20:22:53,467 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1076 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:53,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 2725 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 545 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:22:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63501 states. [2021-11-25 20:22:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63501 to 63427. [2021-11-25 20:22:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63427 states, 41606 states have (on average 1.2940441282507331) internal successors, (53840), 42306 states have internal predecessors, (53840), 15809 states have call successors, (15809), 6011 states have call predecessors, (15809), 6011 states have return successors, (15905), 15271 states have call predecessors, (15905), 15809 states have call successors, (15905) [2021-11-25 20:22:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63427 states to 63427 states and 85554 transitions. [2021-11-25 20:22:56,951 INFO L78 Accepts]: Start accepts. Automaton has 63427 states and 85554 transitions. Word has length 445 [2021-11-25 20:22:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:56,952 INFO L470 AbstractCegarLoop]: Abstraction has 63427 states and 85554 transitions. [2021-11-25 20:22:56,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-25 20:22:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 63427 states and 85554 transitions. [2021-11-25 20:22:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-11-25 20:22:57,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:57,033 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:22:57,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:22:57,035 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1836080680, now seen corresponding path program 1 times [2021-11-25 20:22:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:57,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881051651] [2021-11-25 20:22:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:57,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2021-11-25 20:22:57,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881051651] [2021-11-25 20:22:57,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881051651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:57,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:57,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:57,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83469434] [2021-11-25 20:22:57,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:57,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:57,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:57,747 INFO L87 Difference]: Start difference. First operand 63427 states and 85554 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-25 20:23:00,530 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 20:23:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:03,837 INFO L93 Difference]: Finished difference Result 110753 states and 149925 transitions. [2021-11-25 20:23:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:23:03,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 448 [2021-11-25 20:23:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:04,068 INFO L225 Difference]: With dead ends: 110753 [2021-11-25 20:23:04,068 INFO L226 Difference]: Without dead ends: 63438 [2021-11-25 20:23:04,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:04,171 INFO L933 BasicCegarLoop]: 1184 mSDtfsCounter, 9 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:04,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2361 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:23:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63438 states. [2021-11-25 20:23:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63438 to 63432. [2021-11-25 20:23:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63432 states, 41610 states have (on average 1.2940398942561884) internal successors, (53845), 42310 states have internal predecessors, (53845), 15810 states have call successors, (15810), 6011 states have call predecessors, (15810), 6011 states have return successors, (15906), 15272 states have call predecessors, (15906), 15810 states have call successors, (15906) [2021-11-25 20:23:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63432 states to 63432 states and 85561 transitions. [2021-11-25 20:23:07,140 INFO L78 Accepts]: Start accepts. Automaton has 63432 states and 85561 transitions. Word has length 448 [2021-11-25 20:23:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:07,142 INFO L470 AbstractCegarLoop]: Abstraction has 63432 states and 85561 transitions. [2021-11-25 20:23:07,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-25 20:23:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 63432 states and 85561 transitions. [2021-11-25 20:23:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-11-25 20:23:07,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:07,241 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:23:07,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:23:07,242 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1934186822, now seen corresponding path program 1 times [2021-11-25 20:23:07,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:07,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845799162] [2021-11-25 20:23:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:07,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1382 trivial. 0 not checked. [2021-11-25 20:23:07,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845799162] [2021-11-25 20:23:07,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845799162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:07,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:07,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:23:07,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843127504] [2021-11-25 20:23:07,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:07,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:23:07,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:23:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:07,764 INFO L87 Difference]: Start difference. First operand 63432 states and 85561 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 20:23:10,357 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 20:23:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:14,758 INFO L93 Difference]: Finished difference Result 129521 states and 178848 transitions. [2021-11-25 20:23:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:23:14,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 461 [2021-11-25 20:23:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:15,083 INFO L225 Difference]: With dead ends: 129521 [2021-11-25 20:23:15,084 INFO L226 Difference]: Without dead ends: 82201 [2021-11-25 20:23:15,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:15,213 INFO L933 BasicCegarLoop]: 1705 mSDtfsCounter, 379 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 3014 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:15,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 3014 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 561 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 20:23:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82201 states. [2021-11-25 20:23:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82201 to 63448. [2021-11-25 20:23:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63448 states, 41621 states have (on average 1.2940342615506595) internal successors, (53859), 42321 states have internal predecessors, (53859), 15815 states have call successors, (15815), 6011 states have call predecessors, (15815), 6011 states have return successors, (15911), 15277 states have call predecessors, (15911), 15815 states have call successors, (15911) [2021-11-25 20:23:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63448 states to 63448 states and 85585 transitions. [2021-11-25 20:23:18,377 INFO L78 Accepts]: Start accepts. Automaton has 63448 states and 85585 transitions. Word has length 461 [2021-11-25 20:23:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 63448 states and 85585 transitions. [2021-11-25 20:23:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 20:23:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 63448 states and 85585 transitions. [2021-11-25 20:23:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-25 20:23:18,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:18,438 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:23:18,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:23:18,439 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2143843682, now seen corresponding path program 1 times [2021-11-25 20:23:18,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:18,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296276703] [2021-11-25 20:23:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:18,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-11-25 20:23:18,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296276703] [2021-11-25 20:23:18,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296276703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077382940] [2021-11-25 20:23:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:18,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:18,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:23:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 8013 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:23:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2021-11-25 20:23:21,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:23:21,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077382940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:21,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:23:21,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:23:21,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215044368] [2021-11-25 20:23:21,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:21,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:23:21,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:23:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:21,844 INFO L87 Difference]: Start difference. First operand 63448 states and 85585 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2021-11-25 20:23:24,366 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 20:23:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:28,866 INFO L93 Difference]: Finished difference Result 133180 states and 180441 transitions. [2021-11-25 20:23:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:23:28,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) Word has length 479 [2021-11-25 20:23:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:29,429 INFO L225 Difference]: With dead ends: 133180 [2021-11-25 20:23:29,429 INFO L226 Difference]: Without dead ends: 85844 [2021-11-25 20:23:29,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:29,515 INFO L933 BasicCegarLoop]: 1486 mSDtfsCounter, 1119 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:29,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2670 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 467 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 20:23:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85844 states. [2021-11-25 20:23:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85844 to 85746. [2021-11-25 20:23:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85746 states, 56230 states have (on average 1.2968877823226035) internal successors, (72924), 57146 states have internal predecessors, (72924), 21421 states have call successors, (21421), 8094 states have call predecessors, (21421), 8094 states have return successors, (21553), 20701 states have call predecessors, (21553), 21421 states have call successors, (21553) [2021-11-25 20:23:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85746 states to 85746 states and 115898 transitions. [2021-11-25 20:23:33,053 INFO L78 Accepts]: Start accepts. Automaton has 85746 states and 115898 transitions. Word has length 479 [2021-11-25 20:23:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:33,053 INFO L470 AbstractCegarLoop]: Abstraction has 85746 states and 115898 transitions. [2021-11-25 20:23:33,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2021-11-25 20:23:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 85746 states and 115898 transitions. [2021-11-25 20:23:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-25 20:23:33,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:33,108 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:23:33,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:23:33,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:23:33,323 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash 969573533, now seen corresponding path program 1 times [2021-11-25 20:23:33,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:33,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250236520] [2021-11-25 20:23:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:33,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2021-11-25 20:23:33,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250236520] [2021-11-25 20:23:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250236520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717045572] [2021-11-25 20:23:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:33,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:33,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:33,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:33,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d053f37-800b-4d97-ade2-7b5b36caafbc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:23:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 8037 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:23:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2021-11-25 20:23:36,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:23:36,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717045572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:36,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:23:36,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:23:36,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094037223] [2021-11-25 20:23:36,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:36,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:23:36,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:36,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:23:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:36,805 INFO L87 Difference]: Start difference. First operand 85746 states and 115898 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2021-11-25 20:23:39,224 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 []