./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/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_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V --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-aef121e [2021-11-23 02:46:04,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:46:04,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:46:04,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:46:04,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:46:04,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:46:04,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:46:04,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:46:04,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:46:04,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:46:04,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:46:04,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:46:04,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:46:04,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:46:04,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:46:04,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:46:04,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:46:04,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:46:04,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:46:04,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:46:04,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:46:04,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:46:04,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:46:04,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:46:04,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:46:04,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:46:04,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:46:04,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:46:04,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:46:04,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:46:04,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:46:04,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:46:04,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:46:04,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:46:04,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:46:04,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:46:04,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:46:04,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:46:04,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:46:04,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:46:04,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:46:04,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:46:04,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:46:04,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:46:04,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:46:04,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:46:04,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:46:04,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:46:04,628 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:46:04,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:46:04,629 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:46:04,629 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:46:04,629 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:46:04,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:46:04,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:46:04,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:46:04,631 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:46:04,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:46:04,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:46:04,632 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:46:04,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:46:04,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:46:04,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:46:04,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:46:04,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:46:04,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:46:04,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:46:04,637 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:46:04,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:46:04,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:46:04,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:46:04,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:04,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:46:04,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:46:04,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:46:04,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:46:04,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:46:04,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:46:04,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:46:04,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:46:04,643 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_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-23 02:46:05,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:46:05,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:46:05,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:46:05,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:46:05,092 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:46:05,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-23 02:46:05,196 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/data/8d30e6e1b/0dfcb091ed784c17989d9e5f964975ab/FLAG299c0b529 [2021-11-23 02:46:06,478 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:46:06,479 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-23 02:46:06,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/data/8d30e6e1b/0dfcb091ed784c17989d9e5f964975ab/FLAG299c0b529 [2021-11-23 02:46:06,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/data/8d30e6e1b/0dfcb091ed784c17989d9e5f964975ab [2021-11-23 02:46:06,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:46:06,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:46:06,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:06,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:46:06,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:46:06,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:06" (1/1) ... [2021-11-23 02:46:06,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54369770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:06, skipping insertion in model container [2021-11-23 02:46:06,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:06" (1/1) ... [2021-11-23 02:46:06,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:46:06,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:46:10,441 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_c5164f30-b527-4d26-a8a4-583221476019/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-23 02:46:10,445 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_c5164f30-b527-4d26-a8a4-583221476019/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-23 02:46:10,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:10,537 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:46:11,080 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_c5164f30-b527-4d26-a8a4-583221476019/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-23 02:46:11,081 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_c5164f30-b527-4d26-a8a4-583221476019/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-23 02:46:11,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:11,346 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:46:11,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11 WrapperNode [2021-11-23 02:46:11,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:11,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:11,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:46:11,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:46:11,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,674 INFO L137 Inliner]: procedures = 391, calls = 2618, calls flagged for inlining = 190, calls inlined = 155, statements flattened = 4319 [2021-11-23 02:46:11,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:11,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:46:11,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:46:11,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:46:11,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:46:11,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:46:11,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:46:11,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:46:11,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (1/1) ... [2021-11-23 02:46:11,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:12,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:46:12,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:46:12,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_95 [2021-11-23 02:46:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_95 [2021-11-23 02:46:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:46:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:46:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:46:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:46:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:46:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:46:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_91 [2021-11-23 02:46:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_91 [2021-11-23 02:46:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_open [2021-11-23 02:46:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_open [2021-11-23 02:46:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 02:46:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-23 02:46:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-23 02:46:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resume [2021-11-23 02:46:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resume [2021-11-23 02:46:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:46:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:46:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:46:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:46:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:46:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:46:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:46:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:46:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:46:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:46:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-23 02:46:12,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-23 02:46:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_rx_urb [2021-11-23 02:46:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_rx_urb [2021-11-23 02:46:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:46:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:46:12,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:46:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-23 02:46:12,063 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-23 02:46:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:46:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-23 02:46:12,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-23 02:46:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:46:12,063 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:46:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:46:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:46:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:46:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:46:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:46:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:46:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_close [2021-11-23 02:46:12,065 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_close [2021-11-23 02:46:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_download_firmware [2021-11-23 02:46:12,065 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_download_firmware [2021-11-23 02:46:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:46:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:46:12,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:46:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:46:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:46:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:46:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:46:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:46:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:46:12,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:46:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-23 02:46:12,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-23 02:46:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-23 02:46:12,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-23 02:46:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 02:46:12,068 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 02:46:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:46:12,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:46:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:46:12,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:46:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-11-23 02:46:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-11-23 02:46:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:46:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:46:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_tx_timeout [2021-11-23 02:46:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_tx_timeout [2021-11-23 02:46:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:46:12,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:46:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-23 02:46:12,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-23 02:46:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 02:46:12,070 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 02:46:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:46:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:46:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:46:12,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:46:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-23 02:46:12,071 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-23 02:46:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_async_set_rx_mode [2021-11-23 02:46:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_async_set_rx_mode [2021-11-23 02:46:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:46:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:46:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-23 02:46:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-23 02:46:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:46:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:46:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:46:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:46:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:46:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:46:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:46:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-23 02:46:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-23 02:46:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:46:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:46:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-23 02:46:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-23 02:46:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:46:12,075 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:46:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:46:12,075 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:46:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:46:12,075 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:46:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_set_rx_mode [2021-11-23 02:46:12,076 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_set_rx_mode [2021-11-23 02:46:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 02:46:12,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 02:46:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:46:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:46:12,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:46:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_int_urb [2021-11-23 02:46:12,077 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_int_urb [2021-11-23 02:46:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_control [2021-11-23 02:46:12,077 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_control [2021-11-23 02:46:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:46:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:46:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-23 02:46:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-23 02:46:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-23 02:46:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_kill_urbs [2021-11-23 02:46:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_kill_urbs [2021-11-23 02:46:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2021-11-23 02:46:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2021-11-23 02:46:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_disconnect [2021-11-23 02:46:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_disconnect [2021-11-23 02:46:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:46:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:46:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:46:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-23 02:46:12,080 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-23 02:46:12,932 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:46:12,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:46:13,179 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:46:22,105 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:46:22,212 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:46:22,978 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:46:22,979 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:46:22,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:22 BoogieIcfgContainer [2021-11-23 02:46:22,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:46:22,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:46:22,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:46:22,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:46:22,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:06" (1/3) ... [2021-11-23 02:46:22,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613e21fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:22, skipping insertion in model container [2021-11-23 02:46:22,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:11" (2/3) ... [2021-11-23 02:46:22,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613e21fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:22, skipping insertion in model container [2021-11-23 02:46:22,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:22" (3/3) ... [2021-11-23 02:46:23,007 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-23 02:46:23,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:46:23,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:46:23,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:46:23,132 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 [2021-11-23 02:46:23,132 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:46:23,186 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) [2021-11-23 02:46:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 02:46:23,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:23,210 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] [2021-11-23 02:46:23,211 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2121611204, now seen corresponding path program 1 times [2021-11-23 02:46:23,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86576433] [2021-11-23 02:46:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:23,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-23 02:46:24,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86576433] [2021-11-23 02:46:24,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86576433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:24,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:24,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:24,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291233631] [2021-11-23 02:46:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:24,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:24,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:24,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:24,086 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) [2021-11-23 02:46:26,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:28,595 INFO L93 Difference]: Finished difference Result 1878 states and 2703 transitions. [2021-11-23 02:46:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:28,604 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 [2021-11-23 02:46:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:28,636 INFO L225 Difference]: With dead ends: 1878 [2021-11-23 02:46:28,636 INFO L226 Difference]: Without dead ends: 1050 [2021-11-23 02:46:28,655 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 [2021-11-23 02:46:28,660 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 449 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:28,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1920 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 02:46:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-23 02:46:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1046. [2021-11-23 02:46:28,873 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) [2021-11-23 02:46:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1446 transitions. [2021-11-23 02:46:28,905 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1446 transitions. Word has length 132 [2021-11-23 02:46:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:28,909 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1446 transitions. [2021-11-23 02:46:28,910 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) [2021-11-23 02:46:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1446 transitions. [2021-11-23 02:46:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:46:28,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:28,925 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] [2021-11-23 02:46:28,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:46:28,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2003354126, now seen corresponding path program 1 times [2021-11-23 02:46:28,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:28,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415837534] [2021-11-23 02:46:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:28,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-23 02:46:29,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415837534] [2021-11-23 02:46:29,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415837534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:29,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:29,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:29,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659792562] [2021-11-23 02:46:29,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:29,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:29,369 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) [2021-11-23 02:46:31,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:33,951 INFO L93 Difference]: Finished difference Result 2740 states and 3798 transitions. [2021-11-23 02:46:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:33,952 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 [2021-11-23 02:46:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:33,975 INFO L225 Difference]: With dead ends: 2740 [2021-11-23 02:46:33,976 INFO L226 Difference]: Without dead ends: 1711 [2021-11-23 02:46:33,985 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 [2021-11-23 02:46:33,989 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 822 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:33,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1924 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 02:46:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-11-23 02:46:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1706. [2021-11-23 02:46:34,265 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) [2021-11-23 02:46:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2363 transitions. [2021-11-23 02:46:34,293 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2363 transitions. Word has length 144 [2021-11-23 02:46:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:34,297 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 2363 transitions. [2021-11-23 02:46:34,298 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) [2021-11-23 02:46:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2363 transitions. [2021-11-23 02:46:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 02:46:34,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:34,305 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] [2021-11-23 02:46:34,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:46:34,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2057792692, now seen corresponding path program 1 times [2021-11-23 02:46:34,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:34,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855134649] [2021-11-23 02:46:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:34,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-23 02:46:34,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:34,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855134649] [2021-11-23 02:46:34,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855134649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:34,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:34,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505669118] [2021-11-23 02:46:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:34,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:34,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:34,735 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) [2021-11-23 02:46:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:39,474 INFO L93 Difference]: Finished difference Result 3773 states and 5202 transitions. [2021-11-23 02:46:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:39,475 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 [2021-11-23 02:46:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:39,498 INFO L225 Difference]: With dead ends: 3773 [2021-11-23 02:46:39,498 INFO L226 Difference]: Without dead ends: 2084 [2021-11-23 02:46:39,509 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 [2021-11-23 02:46:39,510 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 387 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:39,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1963 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 02:46:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-23 02:46:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2080. [2021-11-23 02:46:39,639 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) [2021-11-23 02:46:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2857 transitions. [2021-11-23 02:46:39,664 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2857 transitions. Word has length 150 [2021-11-23 02:46:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:39,667 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2857 transitions. [2021-11-23 02:46:39,668 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) [2021-11-23 02:46:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2857 transitions. [2021-11-23 02:46:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-23 02:46:39,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:39,678 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] [2021-11-23 02:46:39,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:46:39,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -135756040, now seen corresponding path program 1 times [2021-11-23 02:46:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:39,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433532025] [2021-11-23 02:46:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:39,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-11-23 02:46:40,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433532025] [2021-11-23 02:46:40,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433532025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:40,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:40,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044032689] [2021-11-23 02:46:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:40,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:40,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:40,085 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) [2021-11-23 02:46:42,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:44,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:47,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:47,473 INFO L93 Difference]: Finished difference Result 4672 states and 6382 transitions. [2021-11-23 02:46:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:47,474 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 [2021-11-23 02:46:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:47,502 INFO L225 Difference]: With dead ends: 4672 [2021-11-23 02:46:47,502 INFO L226 Difference]: Without dead ends: 2609 [2021-11-23 02:46:47,514 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 [2021-11-23 02:46:47,516 INFO L933 BasicCegarLoop]: 1188 mSDtfsCounter, 760 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:47,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1772 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 445 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 02:46:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-11-23 02:46:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2602. [2021-11-23 02:46:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 1583 states have (on average 1.2457359444093494) internal successors, (1972), 1609 states have internal predecessors, (1972), 773 states have call successors, (773), 245 states have call predecessors, (773), 245 states have return successors, (779), 756 states have call predecessors, (779), 773 states have call successors, (779) [2021-11-23 02:46:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3524 transitions. [2021-11-23 02:46:47,706 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3524 transitions. Word has length 197 [2021-11-23 02:46:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:47,707 INFO L470 AbstractCegarLoop]: Abstraction has 2602 states and 3524 transitions. [2021-11-23 02:46:47,708 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) [2021-11-23 02:46:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3524 transitions. [2021-11-23 02:46:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-23 02:46:47,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:47,715 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] [2021-11-23 02:46:47,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:46:47,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 408761307, now seen corresponding path program 1 times [2021-11-23 02:46:47,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435247846] [2021-11-23 02:46:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:47,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-23 02:46:48,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:48,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435247846] [2021-11-23 02:46:48,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435247846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:48,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:48,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:46:48,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653600765] [2021-11-23 02:46:48,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:48,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:46:48,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:46:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:48,317 INFO L87 Difference]: Start difference. First operand 2602 states and 3524 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) [2021-11-23 02:46:52,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:54,706 INFO L93 Difference]: Finished difference Result 6105 states and 8437 transitions. [2021-11-23 02:46:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:46:54,708 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 [2021-11-23 02:46:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:54,741 INFO L225 Difference]: With dead ends: 6105 [2021-11-23 02:46:54,741 INFO L226 Difference]: Without dead ends: 3520 [2021-11-23 02:46:54,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:46:54,756 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 347 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 138 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:54,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 2879 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 598 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:46:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2021-11-23 02:46:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 2606. [2021-11-23 02:46:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 1587 states have (on average 1.2451165721487083) internal successors, (1976), 1613 states have internal predecessors, (1976), 773 states have call successors, (773), 245 states have call predecessors, (773), 245 states have return successors, (779), 756 states have call predecessors, (779), 773 states have call successors, (779) [2021-11-23 02:46:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3528 transitions. [2021-11-23 02:46:54,996 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3528 transitions. Word has length 282 [2021-11-23 02:46:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:54,997 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3528 transitions. [2021-11-23 02:46:54,998 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) [2021-11-23 02:46:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3528 transitions. [2021-11-23 02:46:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-23 02:46:55,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:55,005 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] [2021-11-23 02:46:55,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:46:55,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 689927914, now seen corresponding path program 1 times [2021-11-23 02:46:55,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:55,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196327904] [2021-11-23 02:46:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:55,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-23 02:46:55,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196327904] [2021-11-23 02:46:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196327904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:55,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:55,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:46:55,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886768161] [2021-11-23 02:46:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:55,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:46:55,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:46:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:55,396 INFO L87 Difference]: Start difference. First operand 2606 states and 3528 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) [2021-11-23 02:46:58,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:00,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:02,141 INFO L93 Difference]: Finished difference Result 5201 states and 7039 transitions. [2021-11-23 02:47:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:47:02,142 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 [2021-11-23 02:47:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:02,162 INFO L225 Difference]: With dead ends: 5201 [2021-11-23 02:47:02,162 INFO L226 Difference]: Without dead ends: 2612 [2021-11-23 02:47:02,171 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 [2021-11-23 02:47:02,173 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 1 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:02,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2583 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 02:47:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-11-23 02:47:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2610. [2021-11-23 02:47:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 1591 states have (on average 1.2445003142677562) internal successors, (1980), 1617 states have internal predecessors, (1980), 773 states have call successors, (773), 245 states have call predecessors, (773), 245 states have return successors, (779), 756 states have call predecessors, (779), 773 states have call successors, (779) [2021-11-23 02:47:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 3532 transitions. [2021-11-23 02:47:02,329 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 3532 transitions. Word has length 299 [2021-11-23 02:47:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:02,333 INFO L470 AbstractCegarLoop]: Abstraction has 2610 states and 3532 transitions. [2021-11-23 02:47:02,333 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) [2021-11-23 02:47:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 3532 transitions. [2021-11-23 02:47:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-23 02:47:02,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:02,343 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] [2021-11-23 02:47:02,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:47:02,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash -469736136, now seen corresponding path program 1 times [2021-11-23 02:47:02,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67839957] [2021-11-23 02:47:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:02,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-11-23 02:47:02,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:02,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67839957] [2021-11-23 02:47:02,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67839957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:02,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826849219] [2021-11-23 02:47:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:02,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:02,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:02,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:47:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 4843 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:47:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2021-11-23 02:47:16,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:47:16,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826849219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:16,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:47:16,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-23 02:47:16,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331024543] [2021-11-23 02:47:16,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:16,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:47:16,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:47:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:47:16,947 INFO L87 Difference]: Start difference. First operand 2610 states and 3532 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) [2021-11-23 02:47:21,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:24,565 INFO L93 Difference]: Finished difference Result 4666 states and 6357 transitions. [2021-11-23 02:47:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:47:24,566 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 [2021-11-23 02:47:24,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:24,625 INFO L225 Difference]: With dead ends: 4666 [2021-11-23 02:47:24,626 INFO L226 Difference]: Without dead ends: 4664 [2021-11-23 02:47:24,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:47:24,628 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 728 mSDsluCounter, 4496 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 4840 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:24,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 4840 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1431 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 02:47:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4664 states. [2021-11-23 02:47:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4664 to 4650. [2021-11-23 02:47:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 2857 states have (on average 1.2485124256212812) internal successors, (3567), 2916 states have internal predecessors, (3567), 1368 states have call successors, (1368), 431 states have call predecessors, (1368), 424 states have return successors, (1385), 1316 states have call predecessors, (1385), 1368 states have call successors, (1385) [2021-11-23 02:47:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6320 transitions. [2021-11-23 02:47:25,020 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6320 transitions. Word has length 301 [2021-11-23 02:47:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:25,021 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 6320 transitions. [2021-11-23 02:47:25,022 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) [2021-11-23 02:47:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6320 transitions. [2021-11-23 02:47:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-23 02:47:25,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:25,033 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] [2021-11-23 02:47:25,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:25,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:47:25,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash 219425488, now seen corresponding path program 1 times [2021-11-23 02:47:25,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:25,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268250432] [2021-11-23 02:47:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:25,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-23 02:47:25,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:25,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268250432] [2021-11-23 02:47:25,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268250432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:25,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:25,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:47:25,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525111540] [2021-11-23 02:47:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:25,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:25,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:25,624 INFO L87 Difference]: Start difference. First operand 4650 states and 6320 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) [2021-11-23 02:47:29,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:30,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:32,503 INFO L93 Difference]: Finished difference Result 9919 states and 13486 transitions. [2021-11-23 02:47:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:47:32,504 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 [2021-11-23 02:47:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:32,539 INFO L225 Difference]: With dead ends: 9919 [2021-11-23 02:47:32,540 INFO L226 Difference]: Without dead ends: 5297 [2021-11-23 02:47:32,556 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 [2021-11-23 02:47:32,557 INFO L933 BasicCegarLoop]: 1082 mSDtfsCounter, 417 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:32,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 2783 Invalid, 893 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 02:47:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-11-23 02:47:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 5287. [2021-11-23 02:47:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5287 states, 3276 states have (on average 1.2533577533577533) internal successors, (4106), 3347 states have internal predecessors, (4106), 1521 states have call successors, (1521), 497 states have call predecessors, (1521), 489 states have return successors, (1538), 1459 states have call predecessors, (1538), 1521 states have call successors, (1538) [2021-11-23 02:47:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 7165 transitions. [2021-11-23 02:47:32,998 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 7165 transitions. Word has length 334 [2021-11-23 02:47:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:33,000 INFO L470 AbstractCegarLoop]: Abstraction has 5287 states and 7165 transitions. [2021-11-23 02:47:33,001 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) [2021-11-23 02:47:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 7165 transitions. [2021-11-23 02:47:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-23 02:47:33,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:33,012 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] [2021-11-23 02:47:33,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:47:33,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 779803651, now seen corresponding path program 1 times [2021-11-23 02:47:33,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:33,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239976668] [2021-11-23 02:47:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:33,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-23 02:47:33,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239976668] [2021-11-23 02:47:33,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239976668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:33,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:33,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:47:33,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809517955] [2021-11-23 02:47:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:33,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:33,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:33,363 INFO L87 Difference]: Start difference. First operand 5287 states and 7165 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) [2021-11-23 02:47:37,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:39,931 INFO L93 Difference]: Finished difference Result 13870 states and 19255 transitions. [2021-11-23 02:47:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:47:39,932 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 [2021-11-23 02:47:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:39,990 INFO L225 Difference]: With dead ends: 13870 [2021-11-23 02:47:39,990 INFO L226 Difference]: Without dead ends: 8611 [2021-11-23 02:47:40,010 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 [2021-11-23 02:47:40,011 INFO L933 BasicCegarLoop]: 1484 mSDtfsCounter, 1034 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:40,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 3877 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:47:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2021-11-23 02:47:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 6072. [2021-11-23 02:47:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6072 states, 3777 states have (on average 1.253640455387874) internal successors, (4735), 3860 states have internal predecessors, (4735), 1716 states have call successors, (1716), 587 states have call predecessors, (1716), 578 states have return successors, (1733), 1644 states have call predecessors, (1733), 1716 states have call successors, (1733) [2021-11-23 02:47:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 8184 transitions. [2021-11-23 02:47:40,607 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 8184 transitions. Word has length 364 [2021-11-23 02:47:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:40,608 INFO L470 AbstractCegarLoop]: Abstraction has 6072 states and 8184 transitions. [2021-11-23 02:47:40,609 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) [2021-11-23 02:47:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 8184 transitions. [2021-11-23 02:47:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-23 02:47:40,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:40,620 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] [2021-11-23 02:47:40,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:47:40,621 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 872631598, now seen corresponding path program 1 times [2021-11-23 02:47:40,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434645629] [2021-11-23 02:47:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:40,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-23 02:47:40,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:40,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434645629] [2021-11-23 02:47:40,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434645629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:40,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:40,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:47:40,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060310298] [2021-11-23 02:47:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:40,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:40,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:40,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:40,905 INFO L87 Difference]: Start difference. First operand 6072 states and 8184 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) [2021-11-23 02:47:44,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:46,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:48,966 INFO L93 Difference]: Finished difference Result 15240 states and 21019 transitions. [2021-11-23 02:47:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:47:48,966 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 [2021-11-23 02:47:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:49,005 INFO L225 Difference]: With dead ends: 15240 [2021-11-23 02:47:49,006 INFO L226 Difference]: Without dead ends: 9196 [2021-11-23 02:47:49,028 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 [2021-11-23 02:47:49,029 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 705 mSDsluCounter, 2848 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 3796 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:49,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 3796 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 904 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 02:47:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-11-23 02:47:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 6665. [2021-11-23 02:47:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 4164 states have (on average 1.2579250720461095) internal successors, (5238), 4259 states have internal predecessors, (5238), 1869 states have call successors, (1869), 641 states have call predecessors, (1869), 631 states have return successors, (1886), 1787 states have call predecessors, (1886), 1869 states have call successors, (1886) [2021-11-23 02:47:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 8993 transitions. [2021-11-23 02:47:49,602 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 8993 transitions. Word has length 365 [2021-11-23 02:47:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:49,603 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 8993 transitions. [2021-11-23 02:47:49,603 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) [2021-11-23 02:47:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 8993 transitions. [2021-11-23 02:47:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-23 02:47:49,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:49,614 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] [2021-11-23 02:47:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:47:49,614 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash 845762433, now seen corresponding path program 1 times [2021-11-23 02:47:49,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:49,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700397038] [2021-11-23 02:47:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:49,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-23 02:47:49,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:49,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700397038] [2021-11-23 02:47:49,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700397038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:49,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:49,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:47:49,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766671281] [2021-11-23 02:47:49,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:49,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:49,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:49,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:49,886 INFO L87 Difference]: Start difference. First operand 6665 states and 8993 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) [2021-11-23 02:47:53,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:55,852 INFO L93 Difference]: Finished difference Result 16378 states and 22589 transitions. [2021-11-23 02:47:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:47:55,852 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 [2021-11-23 02:47:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:55,892 INFO L225 Difference]: With dead ends: 16378 [2021-11-23 02:47:55,893 INFO L226 Difference]: Without dead ends: 9741 [2021-11-23 02:47:55,911 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 [2021-11-23 02:47:55,912 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 879 mSDsluCounter, 2967 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s 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, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:55,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 3888 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 947 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:47:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9741 states. [2021-11-23 02:47:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9741 to 7274. [2021-11-23 02:47:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7274 states, 4567 states have (on average 1.2605649222684476) internal successors, (5757), 4674 states have internal predecessors, (5757), 2022 states have call successors, (2022), 695 states have call predecessors, (2022), 684 states have return successors, (2039), 1930 states have call predecessors, (2039), 2022 states have call successors, (2039) [2021-11-23 02:47:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7274 states to 7274 states and 9818 transitions. [2021-11-23 02:47:56,601 INFO L78 Accepts]: Start accepts. Automaton has 7274 states and 9818 transitions. Word has length 366 [2021-11-23 02:47:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 7274 states and 9818 transitions. [2021-11-23 02:47:56,602 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) [2021-11-23 02:47:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 7274 states and 9818 transitions. [2021-11-23 02:47:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-11-23 02:47:56,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:56,612 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] [2021-11-23 02:47:56,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:47:56,613 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:56,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1207736689, now seen corresponding path program 1 times [2021-11-23 02:47:56,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:56,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110972871] [2021-11-23 02:47:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:56,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2021-11-23 02:47:56,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110972871] [2021-11-23 02:47:56,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110972871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:56,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:56,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:47:56,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186403374] [2021-11-23 02:47:56,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:56,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:56,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:56,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:56,883 INFO L87 Difference]: Start difference. First operand 7274 states and 9818 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) [2021-11-23 02:48:00,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:02,398 INFO L93 Difference]: Finished difference Result 17270 states and 23771 transitions. [2021-11-23 02:48:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:48:02,399 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 [2021-11-23 02:48:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:02,435 INFO L225 Difference]: With dead ends: 17270 [2021-11-23 02:48:02,436 INFO L226 Difference]: Without dead ends: 10024 [2021-11-23 02:48:02,453 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 [2021-11-23 02:48:02,454 INFO L933 BasicCegarLoop]: 1425 mSDtfsCounter, 787 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:02,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 3764 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 910 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 02:48:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10024 states. [2021-11-23 02:48:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10024 to 7498. [2021-11-23 02:48:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7498 states, 4718 states have (on average 1.2571004662992793) internal successors, (5931), 4825 states have internal predecessors, (5931), 2074 states have call successors, (2074), 714 states have call predecessors, (2074), 705 states have return successors, (2085), 1986 states have call predecessors, (2085), 2074 states have call successors, (2085) [2021-11-23 02:48:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7498 states to 7498 states and 10090 transitions. [2021-11-23 02:48:03,126 INFO L78 Accepts]: Start accepts. Automaton has 7498 states and 10090 transitions. Word has length 367 [2021-11-23 02:48:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:03,127 INFO L470 AbstractCegarLoop]: Abstraction has 7498 states and 10090 transitions. [2021-11-23 02:48:03,127 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) [2021-11-23 02:48:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 7498 states and 10090 transitions. [2021-11-23 02:48:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-23 02:48:03,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:03,138 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] [2021-11-23 02:48:03,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:48:03,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1035272491, now seen corresponding path program 1 times [2021-11-23 02:48:03,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:03,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806144412] [2021-11-23 02:48:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:03,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2021-11-23 02:48:03,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:03,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806144412] [2021-11-23 02:48:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806144412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:03,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:03,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:48:03,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657668061] [2021-11-23 02:48:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:03,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:03,465 INFO L87 Difference]: Start difference. First operand 7498 states and 10090 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) [2021-11-23 02:48:07,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:07,746 INFO L93 Difference]: Finished difference Result 12095 states and 16209 transitions. [2021-11-23 02:48:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:07,747 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 [2021-11-23 02:48:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:07,778 INFO L225 Difference]: With dead ends: 12095 [2021-11-23 02:48:07,779 INFO L226 Difference]: Without dead ends: 7468 [2021-11-23 02:48:07,793 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 [2021-11-23 02:48:07,794 INFO L933 BasicCegarLoop]: 1139 mSDtfsCounter, 450 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:07,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 1911 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 473 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 02:48:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-11-23 02:48:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 7462. [2021-11-23 02:48:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7462 states, 4693 states have (on average 1.2531429789047517) internal successors, (5881), 4799 states have internal predecessors, (5881), 2057 states have call successors, (2057), 719 states have call predecessors, (2057), 711 states have return successors, (2067), 1971 states have call predecessors, (2067), 2057 states have call successors, (2067) [2021-11-23 02:48:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7462 states to 7462 states and 10005 transitions. [2021-11-23 02:48:08,453 INFO L78 Accepts]: Start accepts. Automaton has 7462 states and 10005 transitions. Word has length 455 [2021-11-23 02:48:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:08,454 INFO L470 AbstractCegarLoop]: Abstraction has 7462 states and 10005 transitions. [2021-11-23 02:48:08,454 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) [2021-11-23 02:48:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7462 states and 10005 transitions. [2021-11-23 02:48:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-23 02:48:08,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:08,464 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] [2021-11-23 02:48:08,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:48:08,465 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1226109936, now seen corresponding path program 1 times [2021-11-23 02:48:08,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:08,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664677442] [2021-11-23 02:48:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:08,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2021-11-23 02:48:09,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664677442] [2021-11-23 02:48:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664677442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:09,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:09,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:48:09,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578953167] [2021-11-23 02:48:09,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:09,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:48:09,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:48:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:09,318 INFO L87 Difference]: Start difference. First operand 7462 states and 10005 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) [2021-11-23 02:48:15,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:16,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:17,995 INFO L93 Difference]: Finished difference Result 7796 states and 10386 transitions. [2021-11-23 02:48:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:48:17,995 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 [2021-11-23 02:48:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:18,025 INFO L225 Difference]: With dead ends: 7796 [2021-11-23 02:48:18,026 INFO L226 Difference]: Without dead ends: 7794 [2021-11-23 02:48:18,030 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 [2021-11-23 02:48:18,031 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 1539 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:18,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 3195 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2021-11-23 02:48:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7794 states. [2021-11-23 02:48:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7794 to 7762. [2021-11-23 02:48:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7762 states, 4858 states have (on average 1.2459860024701523) internal successors, (6053), 4964 states have internal predecessors, (6053), 2104 states have call successors, (2104), 807 states have call predecessors, (2104), 799 states have return successors, (2114), 2018 states have call predecessors, (2114), 2104 states have call successors, (2114) [2021-11-23 02:48:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7762 states to 7762 states and 10271 transitions. [2021-11-23 02:48:19,027 INFO L78 Accepts]: Start accepts. Automaton has 7762 states and 10271 transitions. Word has length 477 [2021-11-23 02:48:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:19,029 INFO L470 AbstractCegarLoop]: Abstraction has 7762 states and 10271 transitions. [2021-11-23 02:48:19,029 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) [2021-11-23 02:48:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7762 states and 10271 transitions. [2021-11-23 02:48:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-11-23 02:48:19,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:19,056 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] [2021-11-23 02:48:19,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:48:19,057 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1596614629, now seen corresponding path program 1 times [2021-11-23 02:48:19,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345500292] [2021-11-23 02:48:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:19,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 2431 trivial. 0 not checked. [2021-11-23 02:48:19,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345500292] [2021-11-23 02:48:19,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345500292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:19,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:19,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:48:19,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132208994] [2021-11-23 02:48:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:19,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:19,600 INFO L87 Difference]: Start difference. First operand 7762 states and 10271 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) [2021-11-23 02:48:23,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:24,536 INFO L93 Difference]: Finished difference Result 18095 states and 24103 transitions. [2021-11-23 02:48:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:24,536 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 [2021-11-23 02:48:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:24,575 INFO L225 Difference]: With dead ends: 18095 [2021-11-23 02:48:24,575 INFO L226 Difference]: Without dead ends: 10361 [2021-11-23 02:48:24,598 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 [2021-11-23 02:48:24,599 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 774 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:24,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 2279 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 509 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 02:48:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10361 states. [2021-11-23 02:48:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10361 to 10356. [2021-11-23 02:48:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10356 states, 6585 states have (on average 1.2523917995444191) internal successors, (8247), 6728 states have internal predecessors, (8247), 2767 states have call successors, (2767), 1012 states have call predecessors, (2767), 1003 states have return successors, (2785), 2643 states have call predecessors, (2785), 2767 states have call successors, (2785) [2021-11-23 02:48:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10356 states to 10356 states and 13799 transitions. [2021-11-23 02:48:25,674 INFO L78 Accepts]: Start accepts. Automaton has 10356 states and 13799 transitions. Word has length 651 [2021-11-23 02:48:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:25,675 INFO L470 AbstractCegarLoop]: Abstraction has 10356 states and 13799 transitions. [2021-11-23 02:48:25,676 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) [2021-11-23 02:48:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10356 states and 13799 transitions. [2021-11-23 02:48:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2021-11-23 02:48:25,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:25,705 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:25,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:48:25,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1915381733, now seen corresponding path program 1 times [2021-11-23 02:48:25,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:25,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943246273] [2021-11-23 02:48:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:25,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-23 02:48:26,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943246273] [2021-11-23 02:48:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943246273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:26,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:26,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:26,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011678556] [2021-11-23 02:48:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:26,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:26,282 INFO L87 Difference]: Start difference. First operand 10356 states and 13799 transitions. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-23 02:48:31,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:37,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:39,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:41,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:41,316 INFO L93 Difference]: Finished difference Result 23220 states and 30931 transitions. [2021-11-23 02:48:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:48:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) Word has length 673 [2021-11-23 02:48:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:41,365 INFO L225 Difference]: With dead ends: 23220 [2021-11-23 02:48:41,365 INFO L226 Difference]: Without dead ends: 12892 [2021-11-23 02:48:41,390 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 [2021-11-23 02:48:41,391 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 804 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:41,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 5325 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1147 Invalid, 1 Unknown, 0 Unchecked, 14.0s Time] [2021-11-23 02:48:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12892 states. [2021-11-23 02:48:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12892 to 12854. [2021-11-23 02:48:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12854 states, 8182 states have (on average 1.2451723295037889) internal successors, (10188), 8362 states have internal predecessors, (10188), 3443 states have call successors, (3443), 1220 states have call predecessors, (3443), 1228 states have return successors, (3486), 3299 states have call predecessors, (3486), 3443 states have call successors, (3486) [2021-11-23 02:48:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12854 states to 12854 states and 17117 transitions. [2021-11-23 02:48:42,509 INFO L78 Accepts]: Start accepts. Automaton has 12854 states and 17117 transitions. Word has length 673 [2021-11-23 02:48:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:42,527 INFO L470 AbstractCegarLoop]: Abstraction has 12854 states and 17117 transitions. [2021-11-23 02:48:42,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 3 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (96), 4 states have call predecessors, (96), 3 states have call successors, (96) [2021-11-23 02:48:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 12854 states and 17117 transitions. [2021-11-23 02:48:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2021-11-23 02:48:42,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:42,577 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] [2021-11-23 02:48:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:48:42,577 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 946845444, now seen corresponding path program 1 times [2021-11-23 02:48:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097229278] [2021-11-23 02:48:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:42,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-23 02:48:43,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097229278] [2021-11-23 02:48:43,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097229278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:43,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:43,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663337766] [2021-11-23 02:48:43,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:43,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:43,078 INFO L87 Difference]: Start difference. First operand 12854 states and 17117 transitions. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 4 states have internal predecessors, (204), 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) [2021-11-23 02:48:46,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:48,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:50,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:52,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:57,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:57,718 INFO L93 Difference]: Finished difference Result 28152 states and 37502 transitions. [2021-11-23 02:48:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:48:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 4 states have internal predecessors, (204), 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 673 [2021-11-23 02:48:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:57,796 INFO L225 Difference]: With dead ends: 28152 [2021-11-23 02:48:57,797 INFO L226 Difference]: Without dead ends: 15326 [2021-11-23 02:48:57,839 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 [2021-11-23 02:48:57,840 INFO L933 BasicCegarLoop]: 1469 mSDtfsCounter, 763 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:57,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 5221 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1138 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2021-11-23 02:48:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15326 states. [2021-11-23 02:48:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15326 to 15287. [2021-11-23 02:48:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 9752 states have (on average 1.2396431501230516) internal successors, (12089), 9969 states have internal predecessors, (12089), 4089 states have call successors, (4089), 1421 states have call predecessors, (4089), 1445 states have return successors, (4157), 3924 states have call predecessors, (4157), 4089 states have call successors, (4157) [2021-11-23 02:48:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 20335 transitions. [2021-11-23 02:48:59,517 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 20335 transitions. Word has length 673 [2021-11-23 02:48:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:59,518 INFO L470 AbstractCegarLoop]: Abstraction has 15287 states and 20335 transitions. [2021-11-23 02:48:59,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 4 states have internal predecessors, (204), 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) [2021-11-23 02:48:59,519 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 20335 transitions. [2021-11-23 02:48:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-11-23 02:48:59,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:59,556 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] [2021-11-23 02:48:59,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:48:59,557 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 225869159, now seen corresponding path program 1 times [2021-11-23 02:48:59,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:59,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702245239] [2021-11-23 02:48:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:59,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-23 02:49:00,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702245239] [2021-11-23 02:49:00,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702245239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:00,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:00,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:00,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604728138] [2021-11-23 02:49:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:00,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:00,130 INFO L87 Difference]: Start difference. First operand 15287 states and 20335 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) [2021-11-23 02:49:03,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:11,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:11,067 INFO L93 Difference]: Finished difference Result 33043 states and 44027 transitions. [2021-11-23 02:49:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:11,067 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 [2021-11-23 02:49:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:11,113 INFO L225 Difference]: With dead ends: 33043 [2021-11-23 02:49:11,114 INFO L226 Difference]: Without dead ends: 17784 [2021-11-23 02:49:11,142 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 [2021-11-23 02:49:11,143 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 760 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:11,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 5220 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1150 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:49:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17784 states. [2021-11-23 02:49:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17784 to 17745. [2021-11-23 02:49:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17745 states, 11360 states have (on average 1.2348591549295775) internal successors, (14028), 11614 states have internal predecessors, (14028), 4735 states have call successors, (4735), 1609 states have call predecessors, (4735), 1649 states have return successors, (4828), 4549 states have call predecessors, (4828), 4735 states have call successors, (4828) [2021-11-23 02:49:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17745 states to 17745 states and 23591 transitions. [2021-11-23 02:49:12,856 INFO L78 Accepts]: Start accepts. Automaton has 17745 states and 23591 transitions. Word has length 674 [2021-11-23 02:49:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 17745 states and 23591 transitions. [2021-11-23 02:49:12,857 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) [2021-11-23 02:49:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 17745 states and 23591 transitions. [2021-11-23 02:49:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-11-23 02:49:12,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:12,878 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] [2021-11-23 02:49:12,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:49:12,878 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1691200633, now seen corresponding path program 1 times [2021-11-23 02:49:12,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:12,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478577556] [2021-11-23 02:49:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:12,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-23 02:49:13,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478577556] [2021-11-23 02:49:13,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478577556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:13,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:13,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:13,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647321004] [2021-11-23 02:49:13,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:13,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:13,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:13,521 INFO L87 Difference]: Start difference. First operand 17745 states and 23591 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) [2021-11-23 02:49:17,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:20,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:25,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:26,001 INFO L93 Difference]: Finished difference Result 38002 states and 50586 transitions. [2021-11-23 02:49:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:26,002 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 [2021-11-23 02:49:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:26,066 INFO L225 Difference]: With dead ends: 38002 [2021-11-23 02:49:26,066 INFO L226 Difference]: Without dead ends: 20285 [2021-11-23 02:49:26,101 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 [2021-11-23 02:49:26,101 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 763 mSDsluCounter, 4520 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 5218 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:26,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 5218 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1152 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-23 02:49:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20285 states. [2021-11-23 02:49:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20285 to 20246. [2021-11-23 02:49:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20246 states, 12998 states have (on average 1.230727804277581) internal successors, (15997), 13289 states have internal predecessors, (15997), 5381 states have call successors, (5381), 1810 states have call predecessors, (5381), 1866 states have return successors, (5499), 5174 states have call predecessors, (5499), 5381 states have call successors, (5499) [2021-11-23 02:49:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20246 states to 20246 states and 26877 transitions. [2021-11-23 02:49:27,915 INFO L78 Accepts]: Start accepts. Automaton has 20246 states and 26877 transitions. Word has length 676 [2021-11-23 02:49:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:27,916 INFO L470 AbstractCegarLoop]: Abstraction has 20246 states and 26877 transitions. [2021-11-23 02:49:27,916 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) [2021-11-23 02:49:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 20246 states and 26877 transitions. [2021-11-23 02:49:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-11-23 02:49:27,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:27,938 INFO L514 BasicCegarLoop]: trace histogram [26, 22, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:27,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:49:27,939 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1746055294, now seen corresponding path program 1 times [2021-11-23 02:49:27,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:27,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213323519] [2021-11-23 02:49:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:27,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-23 02:49:28,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:28,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213323519] [2021-11-23 02:49:28,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213323519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:28,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:28,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:28,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901051984] [2021-11-23 02:49:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:28,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:28,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:28,785 INFO L87 Difference]: Start difference. First operand 20246 states and 26877 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-23 02:49:35,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:37,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:39,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:45,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:45,203 INFO L93 Difference]: Finished difference Result 43119 states and 57325 transitions. [2021-11-23 02:49:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:45,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 676 [2021-11-23 02:49:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:45,273 INFO L225 Difference]: With dead ends: 43119 [2021-11-23 02:49:45,273 INFO L226 Difference]: Without dead ends: 22901 [2021-11-23 02:49:45,307 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 [2021-11-23 02:49:45,308 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 803 mSDsluCounter, 4606 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 5337 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:45,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 5337 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1163 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2021-11-23 02:49:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22901 states. [2021-11-23 02:49:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22901 to 22863. [2021-11-23 02:49:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 14714 states have (on average 1.227198586380318) internal successors, (18057), 15042 states have internal predecessors, (18057), 6057 states have call successors, (6057), 2018 states have call predecessors, (6057), 2091 states have return successors, (6200), 5830 states have call predecessors, (6200), 6057 states have call successors, (6200) [2021-11-23 02:49:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 30314 transitions. [2021-11-23 02:49:47,272 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 30314 transitions. Word has length 676 [2021-11-23 02:49:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:47,273 INFO L470 AbstractCegarLoop]: Abstraction has 22863 states and 30314 transitions. [2021-11-23 02:49:47,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 4 states have internal predecessors, (207), 3 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-23 02:49:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 30314 transitions. [2021-11-23 02:49:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-11-23 02:49:47,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:47,300 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] [2021-11-23 02:49:47,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:49:47,300 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1880091394, now seen corresponding path program 1 times [2021-11-23 02:49:47,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:47,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968476837] [2021-11-23 02:49:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:47,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2021-11-23 02:49:47,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968476837] [2021-11-23 02:49:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968476837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:47,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:47,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:47,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952528056] [2021-11-23 02:49:47,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:47,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:47,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:47,787 INFO L87 Difference]: Start difference. First operand 22863 states and 30314 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) [2021-11-23 02:49:51,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:53,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:01,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:02,179 INFO L93 Difference]: Finished difference Result 48396 states and 64246 transitions. [2021-11-23 02:50:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:02,180 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 [2021-11-23 02:50:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:02,287 INFO L225 Difference]: With dead ends: 48396 [2021-11-23 02:50:02,287 INFO L226 Difference]: Without dead ends: 25561 [2021-11-23 02:50:02,333 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 [2021-11-23 02:50:02,334 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 828 mSDsluCounter, 4584 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 5319 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:02,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 5319 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1163 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2021-11-23 02:50:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25561 states. [2021-11-23 02:50:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25561 to 25523. [2021-11-23 02:50:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25523 states, 16460 states have (on average 1.2239975698663426) internal successors, (20147), 16825 states have internal predecessors, (20147), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2329 states have return successors, (6901), 6486 states have call predecessors, (6901), 6733 states have call successors, (6901) [2021-11-23 02:50:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25523 states to 25523 states and 33781 transitions. [2021-11-23 02:50:04,461 INFO L78 Accepts]: Start accepts. Automaton has 25523 states and 33781 transitions. Word has length 677 [2021-11-23 02:50:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 25523 states and 33781 transitions. [2021-11-23 02:50:04,462 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) [2021-11-23 02:50:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 25523 states and 33781 transitions. [2021-11-23 02:50:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-23 02:50:04,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:04,493 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:04,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:50:04,494 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1338696489, now seen corresponding path program 1 times [2021-11-23 02:50:04,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:04,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923105833] [2021-11-23 02:50:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:04,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 2549 trivial. 0 not checked. [2021-11-23 02:50:05,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:05,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923105833] [2021-11-23 02:50:05,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923105833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067274256] [2021-11-23 02:50:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:05,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:05,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:05,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:50:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 7210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:50:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2021-11-23 02:50:07,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:07,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067274256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:07,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:07,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:50:07,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383012607] [2021-11-23 02:50:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:07,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:07,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:07,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:07,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:07,457 INFO L87 Difference]: Start difference. First operand 25523 states and 33781 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, (102), 2 states have call predecessors, (102), 3 states have return successors, (101), 3 states have call predecessors, (101), 2 states have call successors, (101) [2021-11-23 02:50:11,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:14,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:16,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:18,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:20,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:23,160 INFO L93 Difference]: Finished difference Result 63279 states and 85701 transitions. [2021-11-23 02:50:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:23,162 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, (102), 2 states have call predecessors, (102), 3 states have return successors, (101), 3 states have call predecessors, (101), 2 states have call successors, (101) Word has length 679 [2021-11-23 02:50:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:23,251 INFO L225 Difference]: With dead ends: 63279 [2021-11-23 02:50:23,251 INFO L226 Difference]: Without dead ends: 37784 [2021-11-23 02:50:23,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:23,294 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 163 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:23,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4117 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 878 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-23 02:50:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37784 states. [2021-11-23 02:50:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37784 to 25595. [2021-11-23 02:50:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25595 states, 16514 states have (on average 1.2232651083928787) internal successors, (20201), 16879 states have internal predecessors, (20201), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2347 states have return successors, (7009), 6504 states have call predecessors, (7009), 6733 states have call successors, (7009) [2021-11-23 02:50:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25595 states to 25595 states and 33943 transitions. [2021-11-23 02:50:25,602 INFO L78 Accepts]: Start accepts. Automaton has 25595 states and 33943 transitions. Word has length 679 [2021-11-23 02:50:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:25,603 INFO L470 AbstractCegarLoop]: Abstraction has 25595 states and 33943 transitions. [2021-11-23 02:50:25,603 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, (102), 2 states have call predecessors, (102), 3 states have return successors, (101), 3 states have call predecessors, (101), 2 states have call successors, (101) [2021-11-23 02:50:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25595 states and 33943 transitions. [2021-11-23 02:50:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2021-11-23 02:50:25,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:25,629 INFO L514 BasicCegarLoop]: trace histogram [27, 22, 21, 21, 15, 15, 15, 15, 15, 15, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:25,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:25,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:25,835 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 459018135, now seen corresponding path program 1 times [2021-11-23 02:50:25,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192078370] [2021-11-23 02:50:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:25,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2695 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 2655 trivial. 0 not checked. [2021-11-23 02:50:26,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:26,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192078370] [2021-11-23 02:50:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192078370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818621593] [2021-11-23 02:50:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:26,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:26,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:26,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:26,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:50:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 7263 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:50:27,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2695 backedges. 1266 proven. 0 refuted. 0 times theorem prover too weak. 1429 trivial. 0 not checked. [2021-11-23 02:50:28,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:28,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818621593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:28,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:28,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:50:28,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038269778] [2021-11-23 02:50:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:28,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:28,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:28,785 INFO L87 Difference]: Start difference. First operand 25595 states and 33943 transitions. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 4 states have internal predecessors, (233), 2 states have call successors, (104), 2 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-23 02:50:35,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:38,268 INFO L93 Difference]: Finished difference Result 63423 states and 86025 transitions. [2021-11-23 02:50:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 4 states have internal predecessors, (233), 2 states have call successors, (104), 2 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) Word has length 695 [2021-11-23 02:50:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:38,363 INFO L225 Difference]: With dead ends: 63423 [2021-11-23 02:50:38,363 INFO L226 Difference]: Without dead ends: 37856 [2021-11-23 02:50:38,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:38,402 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 163 mSDsluCounter, 3660 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:38,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 4117 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 876 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-11-23 02:50:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37856 states. [2021-11-23 02:50:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37856 to 25595. [2021-11-23 02:50:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25595 states, 16514 states have (on average 1.2232651083928787) internal successors, (20201), 16879 states have internal predecessors, (20201), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2347 states have return successors, (7009), 6504 states have call predecessors, (7009), 6733 states have call successors, (7009) [2021-11-23 02:50:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25595 states to 25595 states and 33943 transitions. [2021-11-23 02:50:40,992 INFO L78 Accepts]: Start accepts. Automaton has 25595 states and 33943 transitions. Word has length 695 [2021-11-23 02:50:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:40,993 INFO L470 AbstractCegarLoop]: Abstraction has 25595 states and 33943 transitions. [2021-11-23 02:50:40,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 4 states have internal predecessors, (233), 2 states have call successors, (104), 2 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-23 02:50:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 25595 states and 33943 transitions. [2021-11-23 02:50:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2021-11-23 02:50:41,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:41,028 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] [2021-11-23 02:50:41,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:41,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 02:50:41,242 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1165574998, now seen corresponding path program 1 times [2021-11-23 02:50:41,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:41,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90729691] [2021-11-23 02:50:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:41,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2021-11-23 02:50:41,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:41,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90729691] [2021-11-23 02:50:41,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90729691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552564329] [2021-11-23 02:50:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:41,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:41,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:50:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 7403 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:50:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1340 proven. 0 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2021-11-23 02:50:44,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:44,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552564329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:44,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:44,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 02:50:44,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173333226] [2021-11-23 02:50:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:44,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:44,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:50:44,295 INFO L87 Difference]: Start difference. First operand 25595 states and 33943 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) [2021-11-23 02:50:48,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:52,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:54,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:55,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:58,755 INFO L93 Difference]: Finished difference Result 63480 states and 86082 transitions. [2021-11-23 02:50:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:50:58,756 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 [2021-11-23 02:50:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:58,865 INFO L225 Difference]: With dead ends: 63480 [2021-11-23 02:50:58,865 INFO L226 Difference]: Without dead ends: 37913 [2021-11-23 02:50:59,062 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 [2021-11-23 02:50:59,063 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 165 mSDsluCounter, 4991 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 5230 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:59,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 5230 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1109 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2021-11-23 02:50:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37913 states. [2021-11-23 02:51:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37913 to 25613. [2021-11-23 02:51:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25613 states, 16532 states have (on average 1.2230220179046698) internal successors, (20219), 16897 states have internal predecessors, (20219), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2347 states have return successors, (7009), 6504 states have call predecessors, (7009), 6733 states have call successors, (7009) [2021-11-23 02:51:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25613 states to 25613 states and 33961 transitions. [2021-11-23 02:51:01,529 INFO L78 Accepts]: Start accepts. Automaton has 25613 states and 33961 transitions. Word has length 712 [2021-11-23 02:51:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:01,530 INFO L470 AbstractCegarLoop]: Abstraction has 25613 states and 33961 transitions. [2021-11-23 02:51:01,530 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) [2021-11-23 02:51:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 25613 states and 33961 transitions. [2021-11-23 02:51:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2021-11-23 02:51:01,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:01,556 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] [2021-11-23 02:51:01,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:01,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:01,757 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:01,757 INFO L85 PathProgramCache]: Analyzing trace with hash -954166761, now seen corresponding path program 1 times [2021-11-23 02:51:01,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:01,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954396927] [2021-11-23 02:51:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:01,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 65 proven. 4 refuted. 0 times theorem prover too weak. 2837 trivial. 0 not checked. [2021-11-23 02:51:02,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:02,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954396927] [2021-11-23 02:51:02,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954396927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:51:02,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029541198] [2021-11-23 02:51:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:02,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:02,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:02,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:51:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 7606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:51:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2906 backedges. 1401 proven. 0 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2021-11-23 02:51:05,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:05,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029541198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:05,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:51:05,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:51:05,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818571454] [2021-11-23 02:51:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:05,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:05,153 INFO L87 Difference]: Start difference. First operand 25613 states and 33961 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) [2021-11-23 02:51:12,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:14,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:16,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:19,446 INFO L93 Difference]: Finished difference Result 63495 states and 86115 transitions. [2021-11-23 02:51:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:19,446 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 [2021-11-23 02:51:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:19,549 INFO L225 Difference]: With dead ends: 63495 [2021-11-23 02:51:19,549 INFO L226 Difference]: Without dead ends: 37910 [2021-11-23 02:51:19,594 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 [2021-11-23 02:51:19,594 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 164 mSDsluCounter, 3691 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:19,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 4147 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 866 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:51:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37910 states. [2021-11-23 02:51:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37910 to 25685. [2021-11-23 02:51:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25685 states, 16586 states have (on average 1.2222959122151211) internal successors, (20273), 16951 states have internal predecessors, (20273), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2365 states have return successors, (7117), 6522 states have call predecessors, (7117), 6733 states have call successors, (7117) [2021-11-23 02:51:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25685 states to 25685 states and 34123 transitions. [2021-11-23 02:51:22,258 INFO L78 Accepts]: Start accepts. Automaton has 25685 states and 34123 transitions. Word has length 727 [2021-11-23 02:51:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 25685 states and 34123 transitions. [2021-11-23 02:51:22,259 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) [2021-11-23 02:51:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 25685 states and 34123 transitions. [2021-11-23 02:51:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2021-11-23 02:51:22,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:22,283 INFO L514 BasicCegarLoop]: trace histogram [29, 21, 21, 21, 17, 17, 17, 17, 17, 17, 10, 9, 9, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:22,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:22,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:22,484 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2101192963, now seen corresponding path program 1 times [2021-11-23 02:51:22,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:22,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570092180] [2021-11-23 02:51:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:22,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 42 proven. 4 refuted. 0 times theorem prover too weak. 2999 trivial. 0 not checked. [2021-11-23 02:51:23,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:23,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570092180] [2021-11-23 02:51:23,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570092180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:51:23,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058961075] [2021-11-23 02:51:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:23,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:23,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:23,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:23,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:51:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 7640 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:51:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 1446 proven. 0 refuted. 0 times theorem prover too weak. 1599 trivial. 0 not checked. [2021-11-23 02:51:25,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:25,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058961075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:25,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:51:25,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:51:25,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791045873] [2021-11-23 02:51:25,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:25,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:25,616 INFO L87 Difference]: Start difference. First operand 25685 states and 34123 transitions. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 4 states have internal predecessors, (244), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (108), 3 states have call predecessors, (108), 2 states have call successors, (108) [2021-11-23 02:51:31,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:34,601 INFO L93 Difference]: Finished difference Result 63639 states and 86439 transitions. [2021-11-23 02:51:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 4 states have internal predecessors, (244), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (108), 3 states have call predecessors, (108), 2 states have call successors, (108) Word has length 744 [2021-11-23 02:51:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:34,701 INFO L225 Difference]: With dead ends: 63639 [2021-11-23 02:51:34,701 INFO L226 Difference]: Without dead ends: 37982 [2021-11-23 02:51:34,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:34,745 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 164 mSDsluCounter, 3688 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:34,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 4147 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 863 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:51:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37982 states. [2021-11-23 02:51:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37982 to 25685. [2021-11-23 02:51:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25685 states, 16586 states have (on average 1.2222959122151211) internal successors, (20273), 16951 states have internal predecessors, (20273), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2365 states have return successors, (7117), 6522 states have call predecessors, (7117), 6733 states have call successors, (7117) [2021-11-23 02:51:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25685 states to 25685 states and 34123 transitions. [2021-11-23 02:51:37,557 INFO L78 Accepts]: Start accepts. Automaton has 25685 states and 34123 transitions. Word has length 744 [2021-11-23 02:51:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:37,558 INFO L470 AbstractCegarLoop]: Abstraction has 25685 states and 34123 transitions. [2021-11-23 02:51:37,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 4 states have internal predecessors, (244), 2 states have call successors, (109), 2 states have call predecessors, (109), 3 states have return successors, (108), 3 states have call predecessors, (108), 2 states have call successors, (108) [2021-11-23 02:51:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25685 states and 34123 transitions. [2021-11-23 02:51:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2021-11-23 02:51:37,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:37,580 INFO L514 BasicCegarLoop]: trace histogram [30, 21, 21, 20, 18, 18, 18, 18, 18, 18, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:37,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:37,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 02:51:37,781 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1143750166, now seen corresponding path program 1 times [2021-11-23 02:51:37,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:37,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69217438] [2021-11-23 02:51:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:37,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3260 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 3185 trivial. 0 not checked. [2021-11-23 02:51:38,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69217438] [2021-11-23 02:51:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69217438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:51:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96692850] [2021-11-23 02:51:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:38,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:38,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:38,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:51:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:39,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 7799 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:51:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3260 backedges. 1527 proven. 0 refuted. 0 times theorem prover too weak. 1733 trivial. 0 not checked. [2021-11-23 02:51:41,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:41,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96692850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:41,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:51:41,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 02:51:41,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212224214] [2021-11-23 02:51:41,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:41,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:41,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:41,091 INFO L87 Difference]: Start difference. First operand 25685 states and 34123 transitions. Second operand has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 5 states have internal predecessors, (239), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-23 02:51:47,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:49,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:50,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:52,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:54,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:57,551 INFO L93 Difference]: Finished difference Result 63642 states and 86352 transitions. [2021-11-23 02:51:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:51:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 5 states have internal predecessors, (239), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) Word has length 760 [2021-11-23 02:51:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:57,669 INFO L225 Difference]: With dead ends: 63642 [2021-11-23 02:51:57,670 INFO L226 Difference]: Without dead ends: 37985 [2021-11-23 02:51:57,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:51:57,723 INFO L933 BasicCegarLoop]: 1091 mSDtfsCounter, 166 mSDsluCounter, 5024 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 5265 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:57,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 5265 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1095 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2021-11-23 02:51:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37985 states. [2021-11-23 02:52:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37985 to 25649. [2021-11-23 02:52:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25649 states, 16568 states have (on average 1.22253742153549) internal successors, (20255), 16915 states have internal predecessors, (20255), 6733 states have call successors, (6733), 2239 states have call predecessors, (6733), 2347 states have return successors, (7009), 6522 states have call predecessors, (7009), 6733 states have call successors, (7009) [2021-11-23 02:52:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25649 states to 25649 states and 33997 transitions. [2021-11-23 02:52:00,538 INFO L78 Accepts]: Start accepts. Automaton has 25649 states and 33997 transitions. Word has length 760 [2021-11-23 02:52:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:00,538 INFO L470 AbstractCegarLoop]: Abstraction has 25649 states and 33997 transitions. [2021-11-23 02:52:00,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 5 states have internal predecessors, (239), 2 states have call successors, (108), 2 states have call predecessors, (108), 3 states have return successors, (105), 3 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-23 02:52:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 25649 states and 33997 transitions. [2021-11-23 02:52:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-11-23 02:52:00,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:00,566 INFO L514 BasicCegarLoop]: trace histogram [30, 21, 21, 21, 18, 18, 18, 18, 18, 18, 12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:00,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:00,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 02:52:00,776 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -330530767, now seen corresponding path program 1 times [2021-11-23 02:52:00,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114756002] [2021-11-23 02:52:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:00,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3304 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 3254 trivial. 0 not checked. [2021-11-23 02:52:01,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114756002] [2021-11-23 02:52:01,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114756002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:52:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914172085] [2021-11-23 02:52:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:01,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:01,390 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:01,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5164f30-b527-4d26-a8a4-583221476019/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:52:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 7964 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:52:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3304 backedges. 1522 proven. 0 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2021-11-23 02:52:03,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:52:03,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914172085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:03,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:52:03,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:52:03,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858372682] [2021-11-23 02:52:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:03,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:03,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:03,990 INFO L87 Difference]: Start difference. First operand 25649 states and 33997 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (109), 3 states have call predecessors, (109), 2 states have call successors, (109) [2021-11-23 02:52:08,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:10,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:12,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []