./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:16:05,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:16:05,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:16:06,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:16:06,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:16:06,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:16:06,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:16:06,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:16:06,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:16:06,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:16:06,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:16:06,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:16:06,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:16:06,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:16:06,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:16:06,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:16:06,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:16:06,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:16:06,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:16:06,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:16:06,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:16:06,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:16:06,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:16:06,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:16:06,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:16:06,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:16:06,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:16:06,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:16:06,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:16:06,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:16:06,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:16:06,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:16:06,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:16:06,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:16:06,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:16:06,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:16:06,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:16:06,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:16:06,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:16:06,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:16:06,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:16:06,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:16:06,150 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:16:06,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:16:06,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:16:06,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:16:06,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:16:06,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:16:06,160 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:16:06,161 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:16:06,161 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:16:06,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:16:06,162 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:16:06,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:16:06,163 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:16:06,163 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:16:06,163 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:16:06,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:16:06,164 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:16:06,164 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:16:06,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:16:06,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:16:06,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:16:06,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:16:06,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:16:06,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:16:06,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:16:06,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:16:06,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:16:06,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:16:06,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:16:06,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:06,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:16:06,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:16:06,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:16:06,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:16:06,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:16:06,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:16:06,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:16:06,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:16:06,172 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_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-20 23:16:06,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:16:06,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:16:06,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:16:06,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:16:06,578 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:16:06,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-20 23:16:06,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/data/3f0f6adad/10e2c271aa2743f4803ed4fa0d41222c/FLAG98859c2ef [2021-11-20 23:16:07,802 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:16:07,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-20 23:16:07,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/data/3f0f6adad/10e2c271aa2743f4803ed4fa0d41222c/FLAG98859c2ef [2021-11-20 23:16:08,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/data/3f0f6adad/10e2c271aa2743f4803ed4fa0d41222c [2021-11-20 23:16:08,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:16:08,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:16:08,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:08,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:16:08,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:16:08,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:08" (1/1) ... [2021-11-20 23:16:08,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ce22cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:08, skipping insertion in model container [2021-11-20 23:16:08,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:08" (1/1) ... [2021-11-20 23:16:08,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:16:08,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:16:11,403 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_4b922b08-3acd-470f-9304-304877a358f2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-20 23:16:11,406 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_4b922b08-3acd-470f-9304-304877a358f2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-20 23:16:11,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:11,477 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:16:11,965 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_4b922b08-3acd-470f-9304-304877a358f2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-20 23:16:11,966 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_4b922b08-3acd-470f-9304-304877a358f2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-20 23:16:11,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:12,198 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:16:12,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12 WrapperNode [2021-11-20 23:16:12,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:12,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:12,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:16:12,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:16:12,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,582 INFO L137 Inliner]: procedures = 391, calls = 2618, calls flagged for inlining = 190, calls inlined = 155, statements flattened = 4319 [2021-11-20 23:16:12,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:12,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:16:12,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:16:12,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:16:12,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:16:12,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:16:12,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:16:12,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:16:12,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (1/1) ... [2021-11-20 23:16:12,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:12,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:12,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:16:12,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:16:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_95 [2021-11-20 23:16:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_95 [2021-11-20 23:16:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:16:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:16:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 23:16:12,927 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 23:16:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:16:12,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:16:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_91 [2021-11-20 23:16:12,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_91 [2021-11-20 23:16:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_open [2021-11-20 23:16:12,928 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_open [2021-11-20 23:16:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 23:16:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-20 23:16:12,928 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-20 23:16:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resume [2021-11-20 23:16:12,929 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resume [2021-11-20 23:16:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:16:12,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:16:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:16:12,930 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:16:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:16:12,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:16:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:16:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:16:12,931 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:16:12,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:16:12,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-20 23:16:12,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-20 23:16:12,932 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_rx_urb [2021-11-20 23:16:12,932 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_rx_urb [2021-11-20 23:16:12,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:16:12,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:16:12,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:16:12,933 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-20 23:16:12,933 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-20 23:16:12,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:16:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-20 23:16:12,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-20 23:16:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:16:12,934 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:16:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:16:12,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:16:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-20 23:16:12,935 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-20 23:16:12,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 23:16:12,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 23:16:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_close [2021-11-20 23:16:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_close [2021-11-20 23:16:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_download_firmware [2021-11-20 23:16:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_download_firmware [2021-11-20 23:16:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:16:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-20 23:16:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-20 23:16:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:16:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:16:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:16:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:16:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-20 23:16:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:16:12,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:16:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-20 23:16:12,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-20 23:16:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-20 23:16:12,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-20 23:16:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-20 23:16:12,943 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-20 23:16:12,943 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-20 23:16:12,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-20 23:16:12,943 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:16:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:16:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-11-20 23:16:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-11-20 23:16:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-20 23:16:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-20 23:16:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_tx_timeout [2021-11-20 23:16:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_tx_timeout [2021-11-20 23:16:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:16:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:16:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-20 23:16:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-20 23:16:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-20 23:16:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-20 23:16:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:16:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:16:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:16:12,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:16:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-20 23:16:12,949 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-20 23:16:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_async_set_rx_mode [2021-11-20 23:16:12,950 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_async_set_rx_mode [2021-11-20 23:16:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:16:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:16:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-20 23:16:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-20 23:16:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:16:12,952 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-20 23:16:12,952 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-20 23:16:12,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:16:12,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:16:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:16:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:16:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-20 23:16:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-20 23:16:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:16:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:16:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-20 23:16:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-20 23:16:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-20 23:16:12,956 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-20 23:16:12,958 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:16:12,959 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:16:12,959 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:16:12,959 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:16:12,959 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_set_rx_mode [2021-11-20 23:16:12,960 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_set_rx_mode [2021-11-20 23:16:12,960 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-20 23:16:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-20 23:16:12,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:16:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:16:12,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:16:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_int_urb [2021-11-20 23:16:12,968 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_int_urb [2021-11-20 23:16:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_control [2021-11-20 23:16:12,968 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_control [2021-11-20 23:16:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:16:12,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:16:12,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-20 23:16:12,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-20 23:16:12,969 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-20 23:16:12,969 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_kill_urbs [2021-11-20 23:16:12,970 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_kill_urbs [2021-11-20 23:16:12,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2021-11-20 23:16:12,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2021-11-20 23:16:12,970 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_disconnect [2021-11-20 23:16:12,970 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_disconnect [2021-11-20 23:16:12,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:16:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:16:12,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:16:12,971 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-20 23:16:12,971 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-20 23:16:13,776 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:16:13,782 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:16:14,007 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:16:21,552 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 23:16:21,615 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:16:22,193 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:16:22,193 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:16:22,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:22 BoogieIcfgContainer [2021-11-20 23:16:22,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:16:22,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:16:22,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:16:22,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:16:22,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:16:08" (1/3) ... [2021-11-20 23:16:22,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e7cc1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:22, skipping insertion in model container [2021-11-20 23:16:22,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:12" (2/3) ... [2021-11-20 23:16:22,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e7cc1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:22, skipping insertion in model container [2021-11-20 23:16:22,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:22" (3/3) ... [2021-11-20 23:16:22,206 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-20 23:16:22,212 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:16:22,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:16:22,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:16:22,273 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 [2021-11-20 23:16:22,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:16:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 783 states, 442 states have (on average 1.257918552036199) internal successors, (556), 447 states have internal predecessors, (556), 280 states have call successors, (280), 61 states have call predecessors, (280), 60 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2021-11-20 23:16:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 23:16:22,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,358 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:22,359 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2121611204, now seen corresponding path program 1 times [2021-11-20 23:16:22,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484278506] [2021-11-20 23:16:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-20 23:16:23,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484278506] [2021-11-20 23:16:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484278506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:23,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:23,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536070266] [2021-11-20 23:16:23,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:23,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:23,302 INFO L87 Difference]: Start difference. First operand has 783 states, 442 states have (on average 1.257918552036199) internal successors, (556), 447 states have internal predecessors, (556), 280 states have call successors, (280), 61 states have call predecessors, (280), 60 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 23:16:25,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:27,306 INFO L93 Difference]: Finished difference Result 1878 states and 2703 transitions. [2021-11-20 23:16:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 132 [2021-11-20 23:16:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:27,337 INFO L225 Difference]: With dead ends: 1878 [2021-11-20 23:16:27,338 INFO L226 Difference]: Without dead ends: 1050 [2021-11-20 23:16:27,349 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 [2021-11-20 23:16:27,353 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 449 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:27,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1920 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 23:16:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-20 23:16:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1046. [2021-11-20 23:16:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 621 states have (on average 1.2560386473429952) internal successors, (780), 629 states have internal predecessors, (780), 333 states have call successors, (333), 91 states have call predecessors, (333), 91 states have return successors, (333), 330 states have call predecessors, (333), 333 states have call successors, (333) [2021-11-20 23:16:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1446 transitions. [2021-11-20 23:16:27,592 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1446 transitions. Word has length 132 [2021-11-20 23:16:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1446 transitions. [2021-11-20 23:16:27,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 23:16:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1446 transitions. [2021-11-20 23:16:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 23:16:27,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:27,623 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:27,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:16:27,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:27,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2003354126, now seen corresponding path program 1 times [2021-11-20 23:16:27,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:27,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265029689] [2021-11-20 23:16:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:27,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-20 23:16:27,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:27,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265029689] [2021-11-20 23:16:27,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265029689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:27,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:27,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:27,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72160876] [2021-11-20 23:16:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:27,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:27,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:27,975 INFO L87 Difference]: Start difference. First operand 1046 states and 1446 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 23:16:30,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:32,376 INFO L93 Difference]: Finished difference Result 2740 states and 3798 transitions. [2021-11-20 23:16:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 144 [2021-11-20 23:16:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:32,395 INFO L225 Difference]: With dead ends: 2740 [2021-11-20 23:16:32,395 INFO L226 Difference]: Without dead ends: 1711 [2021-11-20 23:16:32,400 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 [2021-11-20 23:16:32,402 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 822 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:32,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1924 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 23:16:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-11-20 23:16:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1706. [2021-11-20 23:16:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1015 states have (on average 1.245320197044335) internal successors, (1264), 1029 states have internal predecessors, (1264), 547 states have call successors, (547), 143 states have call predecessors, (547), 143 states have return successors, (552), 538 states have call predecessors, (552), 547 states have call successors, (552) [2021-11-20 23:16:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2363 transitions. [2021-11-20 23:16:32,564 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2363 transitions. Word has length 144 [2021-11-20 23:16:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:32,565 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 2363 transitions. [2021-11-20 23:16:32,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 23:16:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2363 transitions. [2021-11-20 23:16:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 23:16:32,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:32,571 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:32,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:16:32,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2057792692, now seen corresponding path program 1 times [2021-11-20 23:16:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583445747] [2021-11-20 23:16:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:32,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-20 23:16:32,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:32,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583445747] [2021-11-20 23:16:32,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583445747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:32,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:32,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:32,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656725614] [2021-11-20 23:16:32,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:32,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:32,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:32,851 INFO L87 Difference]: Start difference. First operand 1706 states and 2363 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 23:16:35,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:36,998 INFO L93 Difference]: Finished difference Result 3773 states and 5202 transitions. [2021-11-20 23:16:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:36,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 150 [2021-11-20 23:16:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:37,021 INFO L225 Difference]: With dead ends: 3773 [2021-11-20 23:16:37,021 INFO L226 Difference]: Without dead ends: 2084 [2021-11-20 23:16:37,032 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 [2021-11-20 23:16:37,033 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 387 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:37,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1963 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 23:16:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-20 23:16:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2080. [2021-11-20 23:16:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1260 states have (on average 1.2476190476190476) internal successors, (1572), 1278 states have internal predecessors, (1572), 640 states have call successors, (640), 179 states have call predecessors, (640), 179 states have return successors, (645), 629 states have call predecessors, (645), 640 states have call successors, (645) [2021-11-20 23:16:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2857 transitions. [2021-11-20 23:16:37,169 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2857 transitions. Word has length 150 [2021-11-20 23:16:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:37,170 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2857 transitions. [2021-11-20 23:16:37,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 23:16:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2857 transitions. [2021-11-20 23:16:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-20 23:16:37,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:37,175 INFO L514 BasicCegarLoop]: trace histogram [13, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:37,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:16:37,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash -135756040, now seen corresponding path program 1 times [2021-11-20 23:16:37,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:37,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078716256] [2021-11-20 23:16:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:37,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-11-20 23:16:37,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:37,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078716256] [2021-11-20 23:16:37,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078716256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:37,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:37,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:37,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312841153] [2021-11-20 23:16:37,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:37,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:37,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:37,528 INFO L87 Difference]: Start difference. First operand 2080 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 23:16:41,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:41,618 INFO L93 Difference]: Finished difference Result 4680 states and 6394 transitions. [2021-11-20 23:16:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 197 [2021-11-20 23:16:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:41,646 INFO L225 Difference]: With dead ends: 4680 [2021-11-20 23:16:41,647 INFO L226 Difference]: Without dead ends: 2617 [2021-11-20 23:16:41,658 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 [2021-11-20 23:16:41,660 INFO L933 BasicCegarLoop]: 1200 mSDtfsCounter, 774 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:41,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1784 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 23:16:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-11-20 23:16:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2611. [2021-11-20 23:16:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 1588 states have (on average 1.2455919395465995) internal successors, (1978), 1613 states have internal predecessors, (1978), 777 states have call successors, (777), 245 states have call predecessors, (777), 245 states have return successors, (782), 761 states have call predecessors, (782), 777 states have call successors, (782) [2021-11-20 23:16:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3537 transitions. [2021-11-20 23:16:41,855 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3537 transitions. Word has length 197 [2021-11-20 23:16:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:41,858 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 3537 transitions. [2021-11-20 23:16:41,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 23:16:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3537 transitions. [2021-11-20 23:16:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-20 23:16:41,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:41,867 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 12, 9, 9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:41,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:16:41,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash 408761307, now seen corresponding path program 1 times [2021-11-20 23:16:41,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:41,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206412084] [2021-11-20 23:16:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:41,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-20 23:16:42,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206412084] [2021-11-20 23:16:42,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206412084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:42,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:42,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:42,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956994471] [2021-11-20 23:16:42,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:42,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:42,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:42,478 INFO L87 Difference]: Start difference. First operand 2611 states and 3537 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:16:47,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:49,937 INFO L93 Difference]: Finished difference Result 6123 states and 8463 transitions. [2021-11-20 23:16:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:16:49,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 282 [2021-11-20 23:16:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:49,974 INFO L225 Difference]: With dead ends: 6123 [2021-11-20 23:16:49,975 INFO L226 Difference]: Without dead ends: 3529 [2021-11-20 23:16:49,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:49,989 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 347 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:49,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 2879 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 23:16:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2021-11-20 23:16:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2615. [2021-11-20 23:16:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 1592 states have (on average 1.2449748743718594) internal successors, (1982), 1617 states have internal predecessors, (1982), 777 states have call successors, (777), 245 states have call predecessors, (777), 245 states have return successors, (782), 761 states have call predecessors, (782), 777 states have call successors, (782) [2021-11-20 23:16:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3541 transitions. [2021-11-20 23:16:50,199 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3541 transitions. Word has length 282 [2021-11-20 23:16:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 3541 transitions. [2021-11-20 23:16:50,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:16:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3541 transitions. [2021-11-20 23:16:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-20 23:16:50,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:50,208 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:16:50,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash 689927914, now seen corresponding path program 1 times [2021-11-20 23:16:50,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:50,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145088811] [2021-11-20 23:16:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:50,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-20 23:16:50,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145088811] [2021-11-20 23:16:50,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145088811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:50,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:50,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810897236] [2021-11-20 23:16:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:50,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:50,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:50,699 INFO L87 Difference]: Start difference. First operand 2615 states and 3541 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 23:16:53,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:55,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:56,942 INFO L93 Difference]: Finished difference Result 5219 states and 7065 transitions. [2021-11-20 23:16:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:16:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 299 [2021-11-20 23:16:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:56,967 INFO L225 Difference]: With dead ends: 5219 [2021-11-20 23:16:56,967 INFO L226 Difference]: Without dead ends: 2621 [2021-11-20 23:16:56,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:56,981 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 1 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:56,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2583 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 549 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-20 23:16:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-11-20 23:16:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2619. [2021-11-20 23:16:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 1596 states have (on average 1.244360902255639) internal successors, (1986), 1621 states have internal predecessors, (1986), 777 states have call successors, (777), 245 states have call predecessors, (777), 245 states have return successors, (782), 761 states have call predecessors, (782), 777 states have call successors, (782) [2021-11-20 23:16:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 3545 transitions. [2021-11-20 23:16:57,140 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 3545 transitions. Word has length 299 [2021-11-20 23:16:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:57,145 INFO L470 AbstractCegarLoop]: Abstraction has 2619 states and 3545 transitions. [2021-11-20 23:16:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 23:16:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 3545 transitions. [2021-11-20 23:16:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-20 23:16:57,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:57,153 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:57,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:16:57,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash -469736136, now seen corresponding path program 1 times [2021-11-20 23:16:57,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:57,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112792407] [2021-11-20 23:16:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:57,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-20 23:16:57,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112792407] [2021-11-20 23:16:57,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112792407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:57,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150515231] [2021-11-20 23:16:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:57,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:57,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:57,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:16:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 4843 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:16:58,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2021-11-20 23:17:14,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:17:14,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150515231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:14,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:17:14,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-20 23:17:14,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161192788] [2021-11-20 23:17:14,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:14,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:14,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:17:14,755 INFO L87 Difference]: Start difference. First operand 2619 states and 3545 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-20 23:17:18,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:20,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:22,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:25,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:28,882 INFO L93 Difference]: Finished difference Result 4676 states and 6371 transitions. [2021-11-20 23:17:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) Word has length 301 [2021-11-20 23:17:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:28,922 INFO L225 Difference]: With dead ends: 4676 [2021-11-20 23:17:28,922 INFO L226 Difference]: Without dead ends: 4674 [2021-11-20 23:17:28,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:17:28,927 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 728 mSDsluCounter, 4502 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 4840 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:28,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 4840 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1436 Invalid, 2 Unknown, 0 Unchecked, 13.7s Time] [2021-11-20 23:17:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2021-11-20 23:17:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4659. [2021-11-20 23:17:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 2862 states have (on average 1.248427672955975) internal successors, (3573), 2920 states have internal predecessors, (3573), 1372 states have call successors, (1372), 431 states have call predecessors, (1372), 424 states have return successors, (1388), 1321 states have call predecessors, (1388), 1372 states have call successors, (1388) [2021-11-20 23:17:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 6333 transitions. [2021-11-20 23:17:29,312 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 6333 transitions. Word has length 301 [2021-11-20 23:17:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:29,314 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 6333 transitions. [2021-11-20 23:17:29,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-20 23:17:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 6333 transitions. [2021-11-20 23:17:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-20 23:17:29,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:29,325 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:17:29,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:29,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 23:17:29,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash 219425488, now seen corresponding path program 1 times [2021-11-20 23:17:29,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:29,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872528525] [2021-11-20 23:17:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:29,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-20 23:17:30,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872528525] [2021-11-20 23:17:30,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872528525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:30,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:30,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:17:30,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810491388] [2021-11-20 23:17:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:30,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:17:30,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:30,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:17:30,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:30,011 INFO L87 Difference]: Start difference. First operand 4659 states and 6333 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-20 23:17:33,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:35,218 INFO L93 Difference]: Finished difference Result 9937 states and 13512 transitions. [2021-11-20 23:17:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:17:35,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 334 [2021-11-20 23:17:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:35,268 INFO L225 Difference]: With dead ends: 9937 [2021-11-20 23:17:35,268 INFO L226 Difference]: Without dead ends: 5306 [2021-11-20 23:17:35,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:35,292 INFO L933 BasicCegarLoop]: 1082 mSDtfsCounter, 417 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:35,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 2783 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 881 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 23:17:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2021-11-20 23:17:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5296. [2021-11-20 23:17:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5296 states, 3281 states have (on average 1.2532764401097227) internal successors, (4112), 3351 states have internal predecessors, (4112), 1525 states have call successors, (1525), 497 states have call predecessors, (1525), 489 states have return successors, (1541), 1464 states have call predecessors, (1541), 1525 states have call successors, (1541) [2021-11-20 23:17:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5296 states to 5296 states and 7178 transitions. [2021-11-20 23:17:35,769 INFO L78 Accepts]: Start accepts. Automaton has 5296 states and 7178 transitions. Word has length 334 [2021-11-20 23:17:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:35,770 INFO L470 AbstractCegarLoop]: Abstraction has 5296 states and 7178 transitions. [2021-11-20 23:17:35,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-20 23:17:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5296 states and 7178 transitions. [2021-11-20 23:17:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-20 23:17:35,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:35,784 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:17:35,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:17:35,785 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 779803651, now seen corresponding path program 1 times [2021-11-20 23:17:35,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447797759] [2021-11-20 23:17:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:35,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-20 23:17:36,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447797759] [2021-11-20 23:17:36,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447797759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:36,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:36,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:17:36,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204814308] [2021-11-20 23:17:36,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:36,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:17:36,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:17:36,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:36,154 INFO L87 Difference]: Start difference. First operand 5296 states and 7178 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:17:39,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:43,832 INFO L93 Difference]: Finished difference Result 13888 states and 19280 transitions. [2021-11-20 23:17:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:17:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 364 [2021-11-20 23:17:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:43,909 INFO L225 Difference]: With dead ends: 13888 [2021-11-20 23:17:43,910 INFO L226 Difference]: Without dead ends: 8620 [2021-11-20 23:17:43,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:17:43,936 INFO L933 BasicCegarLoop]: 1482 mSDtfsCounter, 1041 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 3876 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:43,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 3876 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-20 23:17:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2021-11-20 23:17:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 6081. [2021-11-20 23:17:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6081 states, 3782 states have (on average 1.2535695399259652) internal successors, (4741), 3864 states have internal predecessors, (4741), 1720 states have call successors, (1720), 587 states have call predecessors, (1720), 578 states have return successors, (1736), 1649 states have call predecessors, (1736), 1720 states have call successors, (1736) [2021-11-20 23:17:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6081 states to 6081 states and 8197 transitions. [2021-11-20 23:17:44,542 INFO L78 Accepts]: Start accepts. Automaton has 6081 states and 8197 transitions. Word has length 364 [2021-11-20 23:17:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:44,543 INFO L470 AbstractCegarLoop]: Abstraction has 6081 states and 8197 transitions. [2021-11-20 23:17:44,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:17:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6081 states and 8197 transitions. [2021-11-20 23:17:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-20 23:17:44,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:44,556 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:17:44,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:17:44,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 872631598, now seen corresponding path program 1 times [2021-11-20 23:17:44,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553792416] [2021-11-20 23:17:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:44,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-20 23:17:45,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553792416] [2021-11-20 23:17:45,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553792416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:45,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:45,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:17:45,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088988925] [2021-11-20 23:17:45,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:17:45,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:17:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:45,005 INFO L87 Difference]: Start difference. First operand 6081 states and 8197 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:17:47,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:49,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:51,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:54,189 INFO L93 Difference]: Finished difference Result 15258 states and 21044 transitions. [2021-11-20 23:17:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:17:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 365 [2021-11-20 23:17:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:54,234 INFO L225 Difference]: With dead ends: 15258 [2021-11-20 23:17:54,235 INFO L226 Difference]: Without dead ends: 9205 [2021-11-20 23:17:54,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:17:54,260 INFO L933 BasicCegarLoop]: 1427 mSDtfsCounter, 705 mSDsluCounter, 2847 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 3793 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:54,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 3793 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 903 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2021-11-20 23:17:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9205 states. [2021-11-20 23:17:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9205 to 6674. [2021-11-20 23:17:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 4169 states have (on average 1.2578556008635164) internal successors, (5244), 4263 states have internal predecessors, (5244), 1873 states have call successors, (1873), 641 states have call predecessors, (1873), 631 states have return successors, (1889), 1792 states have call predecessors, (1889), 1873 states have call successors, (1889) [2021-11-20 23:17:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 9006 transitions. [2021-11-20 23:17:54,893 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 9006 transitions. Word has length 365 [2021-11-20 23:17:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:54,894 INFO L470 AbstractCegarLoop]: Abstraction has 6674 states and 9006 transitions. [2021-11-20 23:17:54,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:17:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 9006 transitions. [2021-11-20 23:17:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-20 23:17:54,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:54,906 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:54,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:17:54,907 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 845762433, now seen corresponding path program 1 times [2021-11-20 23:17:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788921191] [2021-11-20 23:17:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:54,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-20 23:17:55,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788921191] [2021-11-20 23:17:55,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788921191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:55,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:55,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:17:55,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685858667] [2021-11-20 23:17:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:55,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:17:55,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:55,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:17:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:55,250 INFO L87 Difference]: Start difference. First operand 6674 states and 9006 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:17:58,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:01,844 INFO L93 Difference]: Finished difference Result 16396 states and 22614 transitions. [2021-11-20 23:18:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:18:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 366 [2021-11-20 23:18:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:01,893 INFO L225 Difference]: With dead ends: 16396 [2021-11-20 23:18:01,894 INFO L226 Difference]: Without dead ends: 9750 [2021-11-20 23:18:01,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:18:01,923 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 879 mSDsluCounter, 2967 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 3888 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:01,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 3888 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 947 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-20 23:18:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9750 states. [2021-11-20 23:18:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9750 to 7283. [2021-11-20 23:18:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 4572 states have (on average 1.260498687664042) internal successors, (5763), 4678 states have internal predecessors, (5763), 2026 states have call successors, (2026), 695 states have call predecessors, (2026), 684 states have return successors, (2042), 1935 states have call predecessors, (2042), 2026 states have call successors, (2042) [2021-11-20 23:18:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 9831 transitions. [2021-11-20 23:18:02,715 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 9831 transitions. Word has length 366 [2021-11-20 23:18:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:02,716 INFO L470 AbstractCegarLoop]: Abstraction has 7283 states and 9831 transitions. [2021-11-20 23:18:02,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:18:02,717 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 9831 transitions. [2021-11-20 23:18:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-11-20 23:18:02,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:02,726 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:18:02,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:18:02,727 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1207736689, now seen corresponding path program 1 times [2021-11-20 23:18:02,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:02,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872280132] [2021-11-20 23:18:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:02,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-20 23:18:03,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872280132] [2021-11-20 23:18:03,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872280132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:03,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:03,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:18:03,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537410708] [2021-11-20 23:18:03,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:18:03,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:18:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:18:03,040 INFO L87 Difference]: Start difference. First operand 7283 states and 9831 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:18:06,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:08,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:10,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:12,937 INFO L93 Difference]: Finished difference Result 17288 states and 23796 transitions. [2021-11-20 23:18:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:18:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 367 [2021-11-20 23:18:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:12,994 INFO L225 Difference]: With dead ends: 17288 [2021-11-20 23:18:12,994 INFO L226 Difference]: Without dead ends: 10033 [2021-11-20 23:18:13,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:18:13,018 INFO L933 BasicCegarLoop]: 1425 mSDtfsCounter, 787 mSDsluCounter, 2809 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:13,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 3764 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 912 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2021-11-20 23:18:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10033 states. [2021-11-20 23:18:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10033 to 7507. [2021-11-20 23:18:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7507 states, 4723 states have (on average 1.2570400169383866) internal successors, (5937), 4829 states have internal predecessors, (5937), 2078 states have call successors, (2078), 714 states have call predecessors, (2078), 705 states have return successors, (2088), 1991 states have call predecessors, (2088), 2078 states have call successors, (2088) [2021-11-20 23:18:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7507 states to 7507 states and 10103 transitions. [2021-11-20 23:18:13,804 INFO L78 Accepts]: Start accepts. Automaton has 7507 states and 10103 transitions. Word has length 367 [2021-11-20 23:18:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:13,806 INFO L470 AbstractCegarLoop]: Abstraction has 7507 states and 10103 transitions. [2021-11-20 23:18:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:18:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7507 states and 10103 transitions. [2021-11-20 23:18:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-20 23:18:13,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:13,821 INFO L514 BasicCegarLoop]: trace histogram [20, 18, 18, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:13,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:18:13,821 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1035272491, now seen corresponding path program 1 times [2021-11-20 23:18:13,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:13,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804895487] [2021-11-20 23:18:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:13,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2021-11-20 23:18:14,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:14,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804895487] [2021-11-20 23:18:14,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804895487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:14,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:14,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:18:14,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007561445] [2021-11-20 23:18:14,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:14,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:18:14,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:14,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:18:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:18:14,210 INFO L87 Difference]: Start difference. First operand 7507 states and 10103 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2021-11-20 23:18:18,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:18,443 INFO L93 Difference]: Finished difference Result 11988 states and 16087 transitions. [2021-11-20 23:18:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:18:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 455 [2021-11-20 23:18:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:18,480 INFO L225 Difference]: With dead ends: 11988 [2021-11-20 23:18:18,480 INFO L226 Difference]: Without dead ends: 7352 [2021-11-20 23:18:18,495 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 [2021-11-20 23:18:18,496 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 450 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:18,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 1911 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 473 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 23:18:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2021-11-20 23:18:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 7346. [2021-11-20 23:18:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 4624 states have (on average 1.2541089965397925) internal successors, (5799), 4729 states have internal predecessors, (5799), 2031 states have call successors, (2031), 699 states have call predecessors, (2031), 690 states have return successors, (2040), 1945 states have call predecessors, (2040), 2031 states have call successors, (2040) [2021-11-20 23:18:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 9870 transitions. [2021-11-20 23:18:19,299 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 9870 transitions. Word has length 455 [2021-11-20 23:18:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:19,300 INFO L470 AbstractCegarLoop]: Abstraction has 7346 states and 9870 transitions. [2021-11-20 23:18:19,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2021-11-20 23:18:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 9870 transitions. [2021-11-20 23:18:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-20 23:18:19,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:19,313 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:19,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:18:19,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1226109936, now seen corresponding path program 1 times [2021-11-20 23:18:19,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:19,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439395133] [2021-11-20 23:18:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:19,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2021-11-20 23:18:20,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:20,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439395133] [2021-11-20 23:18:20,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439395133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:20,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:18:20,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055943802] [2021-11-20 23:18:20,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:18:20,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:18:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:20,303 INFO L87 Difference]: Start difference. First operand 7346 states and 9870 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (62), 5 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-20 23:18:25,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:28,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:30,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:31,500 INFO L93 Difference]: Finished difference Result 7699 states and 10275 transitions. [2021-11-20 23:18:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:18:31,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (62), 5 states have call predecessors, (62), 3 states have call successors, (62) Word has length 477 [2021-11-20 23:18:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:31,532 INFO L225 Difference]: With dead ends: 7699 [2021-11-20 23:18:31,532 INFO L226 Difference]: Without dead ends: 7697 [2021-11-20 23:18:31,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:18:31,537 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 1144 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:31,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 3195 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1448 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-11-20 23:18:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2021-11-20 23:18:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7667. [2021-11-20 23:18:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 4802 states have (on average 1.2469804248229903) internal successors, (5988), 4907 states have internal predecessors, (5988), 2084 states have call successors, (2084), 789 states have call predecessors, (2084), 780 states have return successors, (2093), 1998 states have call predecessors, (2093), 2084 states have call successors, (2093) [2021-11-20 23:18:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 10165 transitions. [2021-11-20 23:18:32,453 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 10165 transitions. Word has length 477 [2021-11-20 23:18:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:32,454 INFO L470 AbstractCegarLoop]: Abstraction has 7667 states and 10165 transitions. [2021-11-20 23:18:32,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (62), 5 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-20 23:18:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 10165 transitions. [2021-11-20 23:18:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-11-20 23:18:32,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:32,482 INFO L514 BasicCegarLoop]: trace histogram [24, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:32,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:18:32,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1596614629, now seen corresponding path program 1 times [2021-11-20 23:18:32,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:32,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966010093] [2021-11-20 23:18:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:32,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 2431 trivial. 0 not checked. [2021-11-20 23:18:33,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966010093] [2021-11-20 23:18:33,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966010093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:33,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:33,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:18:33,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219804023] [2021-11-20 23:18:33,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:33,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:18:33,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:18:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:18:33,021 INFO L87 Difference]: Start difference. First operand 7667 states and 10165 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 3 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2021-11-20 23:18:36,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:38,089 INFO L93 Difference]: Finished difference Result 17905 states and 23891 transitions. [2021-11-20 23:18:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:18:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 3 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 651 [2021-11-20 23:18:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:38,139 INFO L225 Difference]: With dead ends: 17905 [2021-11-20 23:18:38,139 INFO L226 Difference]: Without dead ends: 10266 [2021-11-20 23:18:38,157 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 [2021-11-20 23:18:38,158 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 774 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:38,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 2279 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 509 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 23:18:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10266 states. [2021-11-20 23:18:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10266 to 10261. [2021-11-20 23:18:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10261 states, 6529 states have (on average 1.2531781283504364) internal successors, (8182), 6671 states have internal predecessors, (8182), 2747 states have call successors, (2747), 994 states have call predecessors, (2747), 984 states have return successors, (2764), 2623 states have call predecessors, (2764), 2747 states have call successors, (2764) [2021-11-20 23:18:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10261 states to 10261 states and 13693 transitions. [2021-11-20 23:18:39,421 INFO L78 Accepts]: Start accepts. Automaton has 10261 states and 13693 transitions. Word has length 651 [2021-11-20 23:18:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:39,422 INFO L470 AbstractCegarLoop]: Abstraction has 10261 states and 13693 transitions. [2021-11-20 23:18:39,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 3 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2021-11-20 23:18:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10261 states and 13693 transitions. [2021-11-20 23:18:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2021-11-20 23:18:39,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:39,452 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:39,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:18:39,453 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1907897489, now seen corresponding path program 1 times [2021-11-20 23:18:39,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:39,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997606787] [2021-11-20 23:18:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:39,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-20 23:18:39,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997606787] [2021-11-20 23:18:39,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997606787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:39,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:39,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:18:39,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737141252] [2021-11-20 23:18:39,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:39,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:18:39,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:39,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:18:39,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:18:39,957 INFO L87 Difference]: Start difference. First operand 10261 states and 13693 transitions. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:18:44,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:46,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:48,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:53,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:54,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:56,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:56,990 INFO L93 Difference]: Finished difference Result 22939 states and 30615 transitions. [2021-11-20 23:18:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:18:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 672 [2021-11-20 23:18:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:57,051 INFO L225 Difference]: With dead ends: 22939 [2021-11-20 23:18:57,051 INFO L226 Difference]: Without dead ends: 12706 [2021-11-20 23:18:57,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:18:57,082 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 804 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:57,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 5325 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1145 Invalid, 3 Unknown, 0 Unchecked, 15.9s Time] [2021-11-20 23:18:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-11-20 23:18:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 12668. [2021-11-20 23:18:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12668 states, 8072 states have (on average 1.2462834489593657) internal successors, (10060), 8250 states have internal predecessors, (10060), 3403 states have call successors, (3403), 1186 states have call predecessors, (3403), 1192 states have return successors, (3444), 3259 states have call predecessors, (3444), 3403 states have call successors, (3444) [2021-11-20 23:18:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12668 states to 12668 states and 16907 transitions. [2021-11-20 23:18:58,360 INFO L78 Accepts]: Start accepts. Automaton has 12668 states and 16907 transitions. Word has length 672 [2021-11-20 23:18:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:58,362 INFO L470 AbstractCegarLoop]: Abstraction has 12668 states and 16907 transitions. [2021-11-20 23:18:58,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:18:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12668 states and 16907 transitions. [2021-11-20 23:18:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-11-20 23:18:58,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:58,397 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:58,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:18:58,398 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 218099440, now seen corresponding path program 1 times [2021-11-20 23:18:58,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:58,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223108962] [2021-11-20 23:18:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:58,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-20 23:18:58,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223108962] [2021-11-20 23:18:58,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223108962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:58,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:58,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:18:58,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091139991] [2021-11-20 23:18:58,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:18:58,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:18:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:18:58,959 INFO L87 Difference]: Start difference. First operand 12668 states and 16907 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-20 23:19:03,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:06,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:12,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:12,268 INFO L93 Difference]: Finished difference Result 27780 states and 37082 transitions. [2021-11-20 23:19:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:19:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 674 [2021-11-20 23:19:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:12,342 INFO L225 Difference]: With dead ends: 27780 [2021-11-20 23:19:12,342 INFO L226 Difference]: Without dead ends: 15140 [2021-11-20 23:19:12,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:12,381 INFO L933 BasicCegarLoop]: 1469 mSDtfsCounter, 763 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:12,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 5221 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1140 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2021-11-20 23:19:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-11-20 23:19:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 15101. [2021-11-20 23:19:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15101 states, 9642 states have (on average 1.2405102675793405) internal successors, (11961), 9857 states have internal predecessors, (11961), 4049 states have call successors, (4049), 1387 states have call predecessors, (4049), 1409 states have return successors, (4115), 3884 states have call predecessors, (4115), 4049 states have call successors, (4115) [2021-11-20 23:19:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15101 states to 15101 states and 20125 transitions. [2021-11-20 23:19:13,923 INFO L78 Accepts]: Start accepts. Automaton has 15101 states and 20125 transitions. Word has length 674 [2021-11-20 23:19:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:13,925 INFO L470 AbstractCegarLoop]: Abstraction has 15101 states and 20125 transitions. [2021-11-20 23:19:13,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-20 23:19:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 15101 states and 20125 transitions. [2021-11-20 23:19:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-11-20 23:19:13,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:13,961 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:13,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:19:13,962 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 225869159, now seen corresponding path program 1 times [2021-11-20 23:19:13,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458657246] [2021-11-20 23:19:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:13,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-20 23:19:14,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:14,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458657246] [2021-11-20 23:19:14,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458657246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:14,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:14,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:19:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064127713] [2021-11-20 23:19:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:14,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:19:14,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:19:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:14,702 INFO L87 Difference]: Start difference. First operand 15101 states and 20125 transitions. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:19:21,132 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:22,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:27,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:27,717 INFO L93 Difference]: Finished difference Result 32671 states and 43607 transitions. [2021-11-20 23:19:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:19:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 674 [2021-11-20 23:19:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:27,876 INFO L225 Difference]: With dead ends: 32671 [2021-11-20 23:19:27,876 INFO L226 Difference]: Without dead ends: 17598 [2021-11-20 23:19:27,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:27,910 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 760 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:27,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 5220 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1149 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2021-11-20 23:19:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17598 states. [2021-11-20 23:19:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17598 to 17559. [2021-11-20 23:19:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17559 states, 11250 states have (on average 1.2355555555555555) internal successors, (13900), 11502 states have internal predecessors, (13900), 4695 states have call successors, (4695), 1575 states have call predecessors, (4695), 1613 states have return successors, (4786), 4509 states have call predecessors, (4786), 4695 states have call successors, (4786) [2021-11-20 23:19:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17559 states to 17559 states and 23381 transitions. [2021-11-20 23:19:29,672 INFO L78 Accepts]: Start accepts. Automaton has 17559 states and 23381 transitions. Word has length 674 [2021-11-20 23:19:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:29,673 INFO L470 AbstractCegarLoop]: Abstraction has 17559 states and 23381 transitions. [2021-11-20 23:19:29,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:19:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 17559 states and 23381 transitions. [2021-11-20 23:19:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-11-20 23:19:29,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:29,706 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:29,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:19:29,706 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1691200633, now seen corresponding path program 1 times [2021-11-20 23:19:29,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:29,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818976822] [2021-11-20 23:19:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:29,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-20 23:19:30,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:30,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818976822] [2021-11-20 23:19:30,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818976822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:30,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:30,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:19:30,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833522747] [2021-11-20 23:19:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:30,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:19:30,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:19:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:30,272 INFO L87 Difference]: Start difference. First operand 17559 states and 23381 transitions. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-20 23:19:35,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:38,853 INFO L93 Difference]: Finished difference Result 37630 states and 50166 transitions. [2021-11-20 23:19:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:19:38,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 676 [2021-11-20 23:19:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:38,921 INFO L225 Difference]: With dead ends: 37630 [2021-11-20 23:19:38,922 INFO L226 Difference]: Without dead ends: 20099 [2021-11-20 23:19:38,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:38,961 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 763 mSDsluCounter, 4517 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 5218 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:38,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 5218 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1148 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-11-20 23:19:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20099 states. [2021-11-20 23:19:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20099 to 20060. [2021-11-20 23:19:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20060 states, 12888 states have (on average 1.231300434512725) internal successors, (15869), 13177 states have internal predecessors, (15869), 5341 states have call successors, (5341), 1776 states have call predecessors, (5341), 1830 states have return successors, (5457), 5134 states have call predecessors, (5457), 5341 states have call successors, (5457) [2021-11-20 23:19:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20060 states to 20060 states and 26667 transitions. [2021-11-20 23:19:40,788 INFO L78 Accepts]: Start accepts. Automaton has 20060 states and 26667 transitions. Word has length 676 [2021-11-20 23:19:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 20060 states and 26667 transitions. [2021-11-20 23:19:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-20 23:19:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 20060 states and 26667 transitions. [2021-11-20 23:19:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-11-20 23:19:40,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:40,810 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:40,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:19:40,810 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1657444814, now seen corresponding path program 1 times [2021-11-20 23:19:40,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:40,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213965434] [2021-11-20 23:19:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:40,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-20 23:19:41,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:41,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213965434] [2021-11-20 23:19:41,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213965434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:41,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:41,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:19:41,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328995028] [2021-11-20 23:19:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:41,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:19:41,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:19:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:41,363 INFO L87 Difference]: Start difference. First operand 20060 states and 26667 transitions. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-20 23:19:45,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:47,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:48,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:54,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:56,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:57,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:57,398 INFO L93 Difference]: Finished difference Result 42656 states and 56801 transitions. [2021-11-20 23:19:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:19:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 677 [2021-11-20 23:19:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:57,482 INFO L225 Difference]: With dead ends: 42656 [2021-11-20 23:19:57,483 INFO L226 Difference]: Without dead ends: 22624 [2021-11-20 23:19:57,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:57,530 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 803 mSDsluCounter, 4608 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 5337 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:57,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 5337 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2021-11-20 23:19:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22624 states. [2021-11-20 23:19:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22624 to 22586. [2021-11-20 23:19:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22586 states, 14550 states have (on average 1.2279037800687285) internal successors, (17866), 14875 states have internal predecessors, (17866), 5997 states have call successors, (5997), 1968 states have call predecessors, (5997), 2038 states have return successors, (6137), 5770 states have call predecessors, (6137), 5997 states have call successors, (6137) [2021-11-20 23:19:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22586 states to 22586 states and 30000 transitions. [2021-11-20 23:19:59,763 INFO L78 Accepts]: Start accepts. Automaton has 22586 states and 30000 transitions. Word has length 677 [2021-11-20 23:19:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:59,765 INFO L470 AbstractCegarLoop]: Abstraction has 22586 states and 30000 transitions. [2021-11-20 23:19:59,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-20 23:19:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 22586 states and 30000 transitions. [2021-11-20 23:19:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-11-20 23:19:59,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:59,807 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:59,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 23:19:59,808 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:59,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1880091394, now seen corresponding path program 1 times [2021-11-20 23:19:59,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:59,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810601713] [2021-11-20 23:19:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:59,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-20 23:20:00,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:00,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810601713] [2021-11-20 23:20:00,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810601713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:00,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:00,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:20:00,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925022359] [2021-11-20 23:20:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:00,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:20:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:20:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:20:00,549 INFO L87 Difference]: Start difference. First operand 22586 states and 30000 transitions. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 4 states have internal predecessors, (208), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:20:05,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:06,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:08,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:10,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:17,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:17,310 INFO L93 Difference]: Finished difference Result 47722 states and 63474 transitions. [2021-11-20 23:20:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:20:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 4 states have internal predecessors, (208), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 677 [2021-11-20 23:20:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:17,410 INFO L225 Difference]: With dead ends: 47722 [2021-11-20 23:20:17,410 INFO L226 Difference]: Without dead ends: 25164 [2021-11-20 23:20:17,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:20:17,460 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 786 mSDsluCounter, 4500 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 5202 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:17,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 5202 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1153 Invalid, 3 Unknown, 0 Unchecked, 14.7s Time] [2021-11-20 23:20:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25164 states. [2021-11-20 23:20:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25164 to 25125. [2021-11-20 23:20:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25125 states, 16224 states have (on average 1.2247904339250493) internal successors, (19871), 16586 states have internal predecessors, (19871), 6643 states have call successors, (6643), 2171 states have call predecessors, (6643), 2257 states have return successors, (6808), 6395 states have call predecessors, (6808), 6643 states have call successors, (6808) [2021-11-20 23:20:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25125 states to 25125 states and 33322 transitions. [2021-11-20 23:20:19,943 INFO L78 Accepts]: Start accepts. Automaton has 25125 states and 33322 transitions. Word has length 677 [2021-11-20 23:20:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:19,944 INFO L470 AbstractCegarLoop]: Abstraction has 25125 states and 33322 transitions. [2021-11-20 23:20:19,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 4 states have internal predecessors, (208), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:20:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 25125 states and 33322 transitions. [2021-11-20 23:20:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-11-20 23:20:19,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:19,968 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:19,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:20:19,968 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1450815549, now seen corresponding path program 1 times [2021-11-20 23:20:19,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374342939] [2021-11-20 23:20:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:19,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 2531 trivial. 0 not checked. [2021-11-20 23:20:20,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:20,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374342939] [2021-11-20 23:20:20,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374342939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:20,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557518192] [2021-11-20 23:20:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:20,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:20:20,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:20:20,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:20:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 7229 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:20:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 1220 proven. 0 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2021-11-20 23:20:23,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:20:23,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557518192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:23,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:20:23,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 23:20:23,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021264168] [2021-11-20 23:20:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:23,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:20:23,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:23,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:20:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:20:23,570 INFO L87 Difference]: Start difference. First operand 25125 states and 33322 transitions. Second operand has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (98), 3 states have call predecessors, (98), 2 states have call successors, (98) [2021-11-20 23:20:27,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:31,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:33,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:35,133 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:37,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:40,125 INFO L93 Difference]: Finished difference Result 62475 states and 84778 transitions. [2021-11-20 23:20:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:20:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (98), 3 states have call predecessors, (98), 2 states have call successors, (98) Word has length 678 [2021-11-20 23:20:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:40,338 INFO L225 Difference]: With dead ends: 62475 [2021-11-20 23:20:40,338 INFO L226 Difference]: Without dead ends: 37378 [2021-11-20 23:20:40,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:20:40,385 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 163 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:40,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4117 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 879 Invalid, 2 Unknown, 0 Unchecked, 13.1s Time] [2021-11-20 23:20:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37378 states. [2021-11-20 23:20:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37378 to 25197. [2021-11-20 23:20:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25197 states, 16278 states have (on average 1.224044722938936) internal successors, (19925), 16640 states have internal predecessors, (19925), 6643 states have call successors, (6643), 2171 states have call predecessors, (6643), 2275 states have return successors, (6919), 6413 states have call predecessors, (6919), 6643 states have call successors, (6919) [2021-11-20 23:20:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25197 states to 25197 states and 33487 transitions. [2021-11-20 23:20:43,187 INFO L78 Accepts]: Start accepts. Automaton has 25197 states and 33487 transitions. Word has length 678 [2021-11-20 23:20:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:43,188 INFO L470 AbstractCegarLoop]: Abstraction has 25197 states and 33487 transitions. [2021-11-20 23:20:43,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (98), 3 states have call predecessors, (98), 2 states have call successors, (98) [2021-11-20 23:20:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 25197 states and 33487 transitions. [2021-11-20 23:20:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2021-11-20 23:20:43,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:43,217 INFO L514 BasicCegarLoop]: trace histogram [27, 21, 21, 21, 15, 15, 15, 15, 15, 15, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:43,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 23:20:43,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 23:20:43,418 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash -985045635, now seen corresponding path program 1 times [2021-11-20 23:20:43,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:43,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699984113] [2021-11-20 23:20:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:43,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 59 proven. 6 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2021-11-20 23:20:43,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699984113] [2021-11-20 23:20:43,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699984113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642446663] [2021-11-20 23:20:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:43,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:20:43,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:20:44,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:20:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 7282 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:20:45,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1263 proven. 0 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2021-11-20 23:20:46,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:20:46,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642446663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:46,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:20:46,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 23:20:46,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675706950] [2021-11-20 23:20:46,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:46,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:20:46,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:20:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:20:46,741 INFO L87 Difference]: Start difference. First operand 25197 states and 33487 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 4 states have internal predecessors, (227), 2 states have call successors, (103), 2 states have call predecessors, (103), 3 states have return successors, (100), 3 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-20 23:20:53,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:55,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:57,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:21:00,876 INFO L93 Difference]: Finished difference Result 62619 states and 85108 transitions. [2021-11-20 23:21:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:21:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 4 states have internal predecessors, (227), 2 states have call successors, (103), 2 states have call predecessors, (103), 3 states have return successors, (100), 3 states have call predecessors, (100), 2 states have call successors, (100) Word has length 694 [2021-11-20 23:21:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:21:01,087 INFO L225 Difference]: With dead ends: 62619 [2021-11-20 23:21:01,087 INFO L226 Difference]: Without dead ends: 37450 [2021-11-20 23:21:01,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:21:01,131 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 163 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:21:01,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4117 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 879 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2021-11-20 23:21:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37450 states. [2021-11-20 23:21:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37450 to 25197. [2021-11-20 23:21:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25197 states, 16278 states have (on average 1.224044722938936) internal successors, (19925), 16640 states have internal predecessors, (19925), 6643 states have call successors, (6643), 2171 states have call predecessors, (6643), 2275 states have return successors, (6919), 6413 states have call predecessors, (6919), 6643 states have call successors, (6919) [2021-11-20 23:21:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25197 states to 25197 states and 33487 transitions. [2021-11-20 23:21:03,660 INFO L78 Accepts]: Start accepts. Automaton has 25197 states and 33487 transitions. Word has length 694 [2021-11-20 23:21:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:21:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 25197 states and 33487 transitions. [2021-11-20 23:21:03,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 4 states have internal predecessors, (227), 2 states have call successors, (103), 2 states have call predecessors, (103), 3 states have return successors, (100), 3 states have call predecessors, (100), 2 states have call successors, (100) [2021-11-20 23:21:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25197 states and 33487 transitions. [2021-11-20 23:21:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2021-11-20 23:21:03,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:03,695 INFO L514 BasicCegarLoop]: trace histogram [28, 22, 21, 21, 16, 16, 16, 16, 16, 16, 8, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:03,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:21:03,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:21:03,920 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:21:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1165574998, now seen corresponding path program 1 times [2021-11-20 23:21:03,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:21:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471488150] [2021-11-20 23:21:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:03,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:21:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2021-11-20 23:21:04,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:21:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471488150] [2021-11-20 23:21:04,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471488150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:21:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178182927] [2021-11-20 23:21:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:04,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:21:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:21:04,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:21:04,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:21:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 7403 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:21:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:21:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1340 proven. 0 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2021-11-20 23:21:07,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:21:07,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178182927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:21:07,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:21:07,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-20 23:21:07,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626287054] [2021-11-20 23:21:07,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:21:07,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:21:07,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:21:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:21:07,629 INFO L87 Difference]: Start difference. First operand 25197 states and 33487 transitions. Second operand has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 5 states have internal predecessors, (236), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-20 23:21:15,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:21:18,602 INFO L93 Difference]: Finished difference Result 62664 states and 85153 transitions. [2021-11-20 23:21:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:21:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 5 states have internal predecessors, (236), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) Word has length 712 [2021-11-20 23:21:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:21:18,711 INFO L225 Difference]: With dead ends: 62664 [2021-11-20 23:21:18,711 INFO L226 Difference]: Without dead ends: 37495 [2021-11-20 23:21:18,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:21:18,754 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 165 mSDsluCounter, 4987 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 5230 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:21:18,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 5230 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1105 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 23:21:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37495 states. [2021-11-20 23:21:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37495 to 25215. [2021-11-20 23:21:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25215 states, 16296 states have (on average 1.2237972508591066) internal successors, (19943), 16658 states have internal predecessors, (19943), 6643 states have call successors, (6643), 2171 states have call predecessors, (6643), 2275 states have return successors, (6919), 6413 states have call predecessors, (6919), 6643 states have call successors, (6919) [2021-11-20 23:21:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25215 states to 25215 states and 33505 transitions. [2021-11-20 23:21:21,513 INFO L78 Accepts]: Start accepts. Automaton has 25215 states and 33505 transitions. Word has length 712 [2021-11-20 23:21:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:21:21,514 INFO L470 AbstractCegarLoop]: Abstraction has 25215 states and 33505 transitions. [2021-11-20 23:21:21,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 5 states have internal predecessors, (236), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-20 23:21:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 25215 states and 33505 transitions. [2021-11-20 23:21:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2021-11-20 23:21:21,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:21,536 INFO L514 BasicCegarLoop]: trace histogram [28, 21, 21, 21, 16, 16, 16, 16, 16, 16, 9, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:21,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 23:21:21,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 23:21:21,737 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:21:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:21,737 INFO L85 PathProgramCache]: Analyzing trace with hash -954166761, now seen corresponding path program 1 times [2021-11-20 23:21:21,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:21:21,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265984527] [2021-11-20 23:21:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:21,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:21:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 65 proven. 4 refuted. 0 times theorem prover too weak. 2837 trivial. 0 not checked. [2021-11-20 23:21:22,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:21:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265984527] [2021-11-20 23:21:22,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265984527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:21:22,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110880821] [2021-11-20 23:21:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:22,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:21:22,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:21:22,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:21:22,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:21:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 7606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:21:23,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:21:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 1401 proven. 0 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2021-11-20 23:21:25,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:21:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110880821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:21:25,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:21:25,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 23:21:25,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026289466] [2021-11-20 23:21:25,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:21:25,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:21:25,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:21:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:21:25,062 INFO L87 Difference]: Start difference. First operand 25215 states and 33505 transitions. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (106), 3 states have call predecessors, (106), 2 states have call successors, (106) [2021-11-20 23:21:31,254 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:21:34,687 INFO L93 Difference]: Finished difference Result 62691 states and 85198 transitions. [2021-11-20 23:21:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:21:34,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (106), 3 states have call predecessors, (106), 2 states have call successors, (106) Word has length 727 [2021-11-20 23:21:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:21:34,798 INFO L225 Difference]: With dead ends: 62691 [2021-11-20 23:21:34,798 INFO L226 Difference]: Without dead ends: 37504 [2021-11-20 23:21:34,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:21:34,846 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 164 mSDsluCounter, 3688 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:21:34,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 4147 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 864 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:21:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37504 states. [2021-11-20 23:21:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37504 to 25287. [2021-11-20 23:21:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25287 states, 16350 states have (on average 1.2230581039755353) internal successors, (19997), 16712 states have internal predecessors, (19997), 6643 states have call successors, (6643), 2171 states have call predecessors, (6643), 2293 states have return successors, (7030), 6431 states have call predecessors, (7030), 6643 states have call successors, (7030) [2021-11-20 23:21:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25287 states to 25287 states and 33670 transitions. [2021-11-20 23:21:37,638 INFO L78 Accepts]: Start accepts. Automaton has 25287 states and 33670 transitions. Word has length 727 [2021-11-20 23:21:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:21:37,639 INFO L470 AbstractCegarLoop]: Abstraction has 25287 states and 33670 transitions. [2021-11-20 23:21:37,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (106), 3 states have call predecessors, (106), 2 states have call successors, (106) [2021-11-20 23:21:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 25287 states and 33670 transitions. [2021-11-20 23:21:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2021-11-20 23:21:37,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:37,672 INFO L514 BasicCegarLoop]: trace histogram [29, 21, 21, 20, 17, 17, 17, 17, 17, 17, 10, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:37,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 23:21:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 23:21:37,888 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:21:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash -236349097, now seen corresponding path program 1 times [2021-11-20 23:21:37,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:21:37,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432658457] [2021-11-20 23:21:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:37,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:21:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3057 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 2985 trivial. 0 not checked. [2021-11-20 23:21:38,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:21:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432658457] [2021-11-20 23:21:38,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432658457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:21:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948664410] [2021-11-20 23:21:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:38,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:21:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:21:38,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:21:38,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b922b08-3acd-470f-9304-304877a358f2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:21:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 7659 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:21:40,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:21:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3057 backedges. 1452 proven. 0 refuted. 0 times theorem prover too weak. 1605 trivial. 0 not checked. [2021-11-20 23:21:41,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:21:41,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948664410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:21:41,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:21:41,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 23:21:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288623350] [2021-11-20 23:21:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:21:41,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:21:41,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:41,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:21:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:21:41,655 INFO L87 Difference]: Start difference. First operand 25287 states and 33670 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 4 states have internal predecessors, (238), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-20 23:21:47,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []