./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.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_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/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_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/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_da248648-6896-4ffd-9352-0ab644db6258/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 f3090fd14639372da088dcbc149768c93516e312be941c28b3a0b4b80aaee842 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:46:31,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:46:31,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:46:31,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:46:31,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:46:31,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:46:31,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:46:31,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:46:31,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:46:31,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:46:31,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:46:31,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:46:31,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:46:31,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:46:31,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:46:31,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:46:31,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:46:31,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:46:31,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:46:31,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:46:31,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:46:31,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:46:31,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:46:31,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:46:31,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:46:31,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:46:31,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:46:31,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:46:31,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:46:31,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:46:31,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:46:31,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:46:31,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:46:31,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:46:31,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:46:31,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:46:31,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:46:31,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:46:31,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:46:31,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:46:31,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:46:31,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:46:32,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:46:32,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:46:32,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:46:32,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:46:32,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:46:32,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:46:32,018 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:46:32,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:46:32,018 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:46:32,026 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:46:32,026 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:46:32,027 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:46:32,027 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:46:32,027 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:46:32,027 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:46:32,028 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:46:32,028 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:46:32,028 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:46:32,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:46:32,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:46:32,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:46:32,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:46:32,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:46:32,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:46:32,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:46:32,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:46:32,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:46:32,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:46:32,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:46:32,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:32,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:46:32,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:46:32,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:46:32,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:46:32,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:46:32,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:46:32,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:46:32,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:46:32,035 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_da248648-6896-4ffd-9352-0ab644db6258/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3090fd14639372da088dcbc149768c93516e312be941c28b3a0b4b80aaee842 [2021-11-23 02:46:32,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:46:32,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:46:32,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:46:32,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:46:32,509 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:46:32,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i [2021-11-23 02:46:32,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/73de956ab/cca98f8d339b4132a25938b8ddf43972/FLAG13517b450 [2021-11-23 02:46:33,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:46:33,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i [2021-11-23 02:46:33,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/73de956ab/cca98f8d339b4132a25938b8ddf43972/FLAG13517b450 [2021-11-23 02:46:34,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/73de956ab/cca98f8d339b4132a25938b8ddf43972 [2021-11-23 02:46:34,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:46:34,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:46:34,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:34,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:46:34,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:46:34,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:34" (1/1) ... [2021-11-23 02:46:34,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f642b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:34, skipping insertion in model container [2021-11-23 02:46:34,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:34" (1/1) ... [2021-11-23 02:46:34,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:46:34,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:46:35,868 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_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i[159323,159336] [2021-11-23 02:46:35,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:35,995 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:46:36,354 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_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i[159323,159336] [2021-11-23 02:46:36,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:36,538 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:46:36,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36 WrapperNode [2021-11-23 02:46:36,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:36,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:36,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:46:36,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:46:36,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:36,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:36,825 INFO L137 Inliner]: procedures = 131, calls = 748, calls flagged for inlining = 45, calls inlined = 42, statements flattened = 2145 [2021-11-23 02:46:36,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:36,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:46:36,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:46:36,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:46:36,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:36,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:36,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:36,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:36,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:37,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:37,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:37,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:46:37,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:46:37,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:46:37,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:46:37,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (1/1) ... [2021-11-23 02:46:37,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:37,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:37,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:46:37,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:46:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 02:46:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 02:46:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:46:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 02:46:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 02:46:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 02:46:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 02:46:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:46:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:46:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:46:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-23 02:46:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-23 02:46:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:46:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:46:37,225 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:46:37,225 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:46:37,225 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 02:46:37,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 02:46:37,225 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:46:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:46:37,226 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:46:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:46:37,226 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-23 02:46:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-23 02:46:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:46:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:46:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure iowarrior_init [2021-11-23 02:46:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure iowarrior_init [2021-11-23 02:46:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:46:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:46:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:46:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:46:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:46:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2021-11-23 02:46:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2021-11-23 02:46:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-23 02:46:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-23 02:46:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:46:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:46:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:46:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:46:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:46:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure iowarrior_exit [2021-11-23 02:46:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure iowarrior_exit [2021-11-23 02:46:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure iowarrior_delete [2021-11-23 02:46:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure iowarrior_delete [2021-11-23 02:46:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:46:37,233 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:46:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:46:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-11-23 02:46:37,235 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-11-23 02:46:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:46:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:46:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:46:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_report [2021-11-23 02:46:37,236 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_report [2021-11-23 02:46:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-23 02:46:37,237 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-23 02:46:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:46:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-23 02:46:37,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-23 02:46:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-23 02:46:37,239 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-23 02:46:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:46:37,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:46:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 02:46:37,240 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 02:46:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 02:46:37,241 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 02:46:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-23 02:46:37,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-23 02:46:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:46:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:46:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:46:37,243 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:46:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-23 02:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-23 02:46:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:46:37,244 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:46:37,245 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:46:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:46:37,245 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:46:37,248 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:46:37,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:46:37,248 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-23 02:46:37,248 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-23 02:46:37,248 INFO L130 BoogieDeclarations]: Found specification of procedure read_index [2021-11-23 02:46:37,249 INFO L138 BoogieDeclarations]: Found implementation of procedure read_index [2021-11-23 02:46:37,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2021-11-23 02:46:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2021-11-23 02:46:37,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:46:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:46:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:46:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-23 02:46:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-23 02:46:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 02:46:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 02:46:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:46:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:46:37,253 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:46:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:46:37,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:46:37,911 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:46:37,929 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:46:38,334 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:46:38,342 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2021-11-23 02:46:38,342 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2021-11-23 02:46:38,575 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2021-11-23 02:46:38,676 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:46:38,687 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:46:38,709 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:46:40,384 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##275: assume !false; [2021-11-23 02:46:40,386 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##274: assume false; [2021-11-23 02:46:40,386 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2021-11-23 02:46:40,386 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2021-11-23 02:46:40,387 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##154: assume !false; [2021-11-23 02:46:40,388 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##153: assume false; [2021-11-23 02:46:40,433 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:46:40,884 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:46:40,884 INFO L301 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-23 02:46:40,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:40 BoogieIcfgContainer [2021-11-23 02:46:40,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:46:40,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:46:40,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:46:40,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:46:40,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:34" (1/3) ... [2021-11-23 02:46:40,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dd378b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:40, skipping insertion in model container [2021-11-23 02:46:40,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36" (2/3) ... [2021-11-23 02:46:40,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dd378b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:40, skipping insertion in model container [2021-11-23 02:46:40,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:40" (3/3) ... [2021-11-23 02:46:40,911 INFO L111 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i [2021-11-23 02:46:40,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:46:40,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:46:41,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:46:41,027 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 02:46:41,028 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:46:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 470 states, 285 states have (on average 1.4210526315789473) internal successors, (405), 308 states have internal predecessors, (405), 141 states have call successors, (141), 43 states have call predecessors, (141), 42 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-11-23 02:46:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:46:41,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:41,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:41,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash 771985703, now seen corresponding path program 1 times [2021-11-23 02:46:41,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28230631] [2021-11-23 02:46:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:41,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:41,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28230631] [2021-11-23 02:46:41,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28230631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:41,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:41,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:41,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257768644] [2021-11-23 02:46:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:41,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:41,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:41,784 INFO L87 Difference]: Start difference. First operand has 470 states, 285 states have (on average 1.4210526315789473) internal successors, (405), 308 states have internal predecessors, (405), 141 states have call successors, (141), 43 states have call predecessors, (141), 42 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:43,499 INFO L93 Difference]: Finished difference Result 1316 states and 1937 transitions. [2021-11-23 02:46:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:43,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 02:46:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:43,531 INFO L225 Difference]: With dead ends: 1316 [2021-11-23 02:46:43,531 INFO L226 Difference]: Without dead ends: 845 [2021-11-23 02:46:43,542 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 02:46:43,547 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 548 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:43,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1265 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:46:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-11-23 02:46:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 841. [2021-11-23 02:46:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 512 states have (on average 1.3671875) internal successors, (700), 540 states have internal predecessors, (700), 251 states have call successors, (251), 79 states have call predecessors, (251), 77 states have return successors, (247), 234 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-23 02:46:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1198 transitions. [2021-11-23 02:46:43,720 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1198 transitions. Word has length 10 [2021-11-23 02:46:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:43,721 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1198 transitions. [2021-11-23 02:46:43,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1198 transitions. [2021-11-23 02:46:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:46:43,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:43,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:43,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:46:43,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1838550195, now seen corresponding path program 1 times [2021-11-23 02:46:43,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260868932] [2021-11-23 02:46:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:43,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:43,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:43,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260868932] [2021-11-23 02:46:43,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260868932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:43,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:43,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:43,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62607867] [2021-11-23 02:46:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:43,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:43,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:43,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:43,923 INFO L87 Difference]: Start difference. First operand 841 states and 1198 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:45,459 INFO L93 Difference]: Finished difference Result 1271 states and 1808 transitions. [2021-11-23 02:46:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:46:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:45,474 INFO L225 Difference]: With dead ends: 1271 [2021-11-23 02:46:45,474 INFO L226 Difference]: Without dead ends: 1262 [2021-11-23 02:46:45,476 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 02:46:45,478 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 607 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:45,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 1273 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:46:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-11-23 02:46:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1257. [2021-11-23 02:46:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 765 states have (on average 1.3607843137254902) internal successors, (1041), 804 states have internal predecessors, (1041), 376 states have call successors, (376), 117 states have call predecessors, (376), 115 states have return successors, (372), 353 states have call predecessors, (372), 372 states have call successors, (372) [2021-11-23 02:46:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1789 transitions. [2021-11-23 02:46:45,585 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1789 transitions. Word has length 11 [2021-11-23 02:46:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:45,586 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 1789 transitions. [2021-11-23 02:46:45,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1789 transitions. [2021-11-23 02:46:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:46:45,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:45,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:46:45,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:46:45,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash -492464051, now seen corresponding path program 1 times [2021-11-23 02:46:45,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:45,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147864370] [2021-11-23 02:46:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:45,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:45,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:45,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147864370] [2021-11-23 02:46:45,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147864370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:45,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:45,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:45,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421310579] [2021-11-23 02:46:45,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:45,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:45,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:45,821 INFO L87 Difference]: Start difference. First operand 1257 states and 1789 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:46,969 INFO L93 Difference]: Finished difference Result 2922 states and 4253 transitions. [2021-11-23 02:46:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-11-23 02:46:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:46,989 INFO L225 Difference]: With dead ends: 2922 [2021-11-23 02:46:46,990 INFO L226 Difference]: Without dead ends: 1671 [2021-11-23 02:46:47,000 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 02:46:47,005 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 145 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:47,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1199 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:46:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-11-23 02:46:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1662. [2021-11-23 02:46:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1025 states have (on average 1.3707317073170733) internal successors, (1405), 1070 states have internal predecessors, (1405), 521 states have call successors, (521), 117 states have call predecessors, (521), 115 states have return successors, (517), 494 states have call predecessors, (517), 517 states have call successors, (517) [2021-11-23 02:46:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2443 transitions. [2021-11-23 02:46:47,155 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2443 transitions. Word has length 38 [2021-11-23 02:46:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:47,156 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2443 transitions. [2021-11-23 02:46:47,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2443 transitions. [2021-11-23 02:46:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:46:47,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:47,172 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:47,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:46:47,173 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1555790810, now seen corresponding path program 1 times [2021-11-23 02:46:47,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:47,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000438107] [2021-11-23 02:46:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:47,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:46:47,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:47,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000438107] [2021-11-23 02:46:47,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000438107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:47,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:47,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:46:47,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981851961] [2021-11-23 02:46:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:47,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:46:47,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:46:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:47,427 INFO L87 Difference]: Start difference. First operand 1662 states and 2443 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:46:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:48,806 INFO L93 Difference]: Finished difference Result 3348 states and 4912 transitions. [2021-11-23 02:46:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:46:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2021-11-23 02:46:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:48,824 INFO L225 Difference]: With dead ends: 3348 [2021-11-23 02:46:48,824 INFO L226 Difference]: Without dead ends: 1682 [2021-11-23 02:46:48,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 02:46:48,844 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 15 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:48,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1731 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:46:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-23 02:46:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1667. [2021-11-23 02:46:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1029 states have (on average 1.3673469387755102) internal successors, (1407), 1074 states have internal predecessors, (1407), 520 states have call successors, (520), 119 states have call predecessors, (520), 117 states have return successors, (516), 493 states have call predecessors, (516), 516 states have call successors, (516) [2021-11-23 02:46:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2443 transitions. [2021-11-23 02:46:49,002 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2443 transitions. Word has length 61 [2021-11-23 02:46:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:49,003 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2443 transitions. [2021-11-23 02:46:49,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:46:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2443 transitions. [2021-11-23 02:46:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:46:49,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:49,008 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:49,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:46:49,009 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -677176210, now seen corresponding path program 1 times [2021-11-23 02:46:49,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309569104] [2021-11-23 02:46:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:49,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:46:49,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:49,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309569104] [2021-11-23 02:46:49,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309569104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:49,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:49,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:49,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621718215] [2021-11-23 02:46:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:49,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:49,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:49,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:49,235 INFO L87 Difference]: Start difference. First operand 1667 states and 2443 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:46:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:50,317 INFO L93 Difference]: Finished difference Result 4239 states and 6395 transitions. [2021-11-23 02:46:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-11-23 02:46:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:50,347 INFO L225 Difference]: With dead ends: 4239 [2021-11-23 02:46:50,347 INFO L226 Difference]: Without dead ends: 2576 [2021-11-23 02:46:50,358 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 02:46:50,359 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 274 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:50,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 1181 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:46:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-11-23 02:46:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2551. [2021-11-23 02:46:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 1635 states have (on average 1.4140672782874617) internal successors, (2312), 1710 states have internal predecessors, (2312), 798 states have call successors, (798), 119 states have call predecessors, (798), 117 states have return successors, (794), 757 states have call predecessors, (794), 794 states have call successors, (794) [2021-11-23 02:46:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3904 transitions. [2021-11-23 02:46:50,579 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3904 transitions. Word has length 60 [2021-11-23 02:46:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:50,582 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 3904 transitions. [2021-11-23 02:46:50,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:46:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3904 transitions. [2021-11-23 02:46:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:46:50,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:50,611 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-23 02:46:50,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:46:50,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1659342528, now seen corresponding path program 1 times [2021-11-23 02:46:50,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:50,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389754951] [2021-11-23 02:46:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:50,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:46:51,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:51,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389754951] [2021-11-23 02:46:51,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389754951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:51,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:51,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:46:51,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779409342] [2021-11-23 02:46:51,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:51,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:46:51,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:46:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:46:51,472 INFO L87 Difference]: Start difference. First operand 2551 states and 3904 transitions. Second operand has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:46:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:56,152 INFO L93 Difference]: Finished difference Result 4354 states and 6668 transitions. [2021-11-23 02:46:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:46:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2021-11-23 02:46:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:56,178 INFO L225 Difference]: With dead ends: 4354 [2021-11-23 02:46:56,179 INFO L226 Difference]: Without dead ends: 2555 [2021-11-23 02:46:56,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:46:56,189 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 6 mSDsluCounter, 4347 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4425 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:56,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 4425 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 02:46:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-11-23 02:46:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2551. [2021-11-23 02:46:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 1635 states have (on average 1.4116207951070336) internal successors, (2308), 1710 states have internal predecessors, (2308), 798 states have call successors, (798), 119 states have call predecessors, (798), 117 states have return successors, (794), 757 states have call predecessors, (794), 794 states have call successors, (794) [2021-11-23 02:46:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3900 transitions. [2021-11-23 02:46:56,442 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3900 transitions. Word has length 88 [2021-11-23 02:46:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:56,443 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 3900 transitions. [2021-11-23 02:46:56,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:46:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3900 transitions. [2021-11-23 02:46:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 02:46:56,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:56,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-23 02:46:56,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:46:56,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1862162160, now seen corresponding path program 1 times [2021-11-23 02:46:56,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:56,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546804472] [2021-11-23 02:46:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:56,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:46:56,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546804472] [2021-11-23 02:46:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546804472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730541641] [2021-11-23 02:46:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:56,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:56,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:56,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:46:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:46:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:46:57,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:46:57,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730541641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:57,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:46:57,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-23 02:46:57,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398317654] [2021-11-23 02:46:57,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:57,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:46:57,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:46:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:46:57,335 INFO L87 Difference]: Start difference. First operand 2551 states and 3900 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-23 02:46:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:58,567 INFO L93 Difference]: Finished difference Result 5162 states and 7882 transitions. [2021-11-23 02:46:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:46:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 84 [2021-11-23 02:46:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:58,594 INFO L225 Difference]: With dead ends: 5162 [2021-11-23 02:46:58,594 INFO L226 Difference]: Without dead ends: 2603 [2021-11-23 02:46:58,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:46:58,602 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 23 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:58,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2335 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:46:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-11-23 02:46:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2557. [2021-11-23 02:46:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 1637 states have (on average 1.4098961514966402) internal successors, (2308), 1712 states have internal predecessors, (2308), 802 states have call successors, (802), 119 states have call predecessors, (802), 117 states have return successors, (798), 761 states have call predecessors, (798), 798 states have call successors, (798) [2021-11-23 02:46:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3908 transitions. [2021-11-23 02:46:58,767 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3908 transitions. Word has length 84 [2021-11-23 02:46:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:58,767 INFO L470 AbstractCegarLoop]: Abstraction has 2557 states and 3908 transitions. [2021-11-23 02:46:58,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-23 02:46:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3908 transitions. [2021-11-23 02:46:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:46:58,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:58,771 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-23 02:46:58,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:58,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:46:58,998 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1947908899, now seen corresponding path program 1 times [2021-11-23 02:46:58,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:58,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80148980] [2021-11-23 02:46:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:58,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:46:59,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80148980] [2021-11-23 02:46:59,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80148980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650808086] [2021-11-23 02:46:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:59,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:59,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:59,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:59,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:46:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:59,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:46:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:46:59,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:47:00,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650808086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:47:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517394243] [2021-11-23 02:47:00,034 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-23 02:47:00,034 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:47:00,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:47:00,044 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:47:00,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:47:01,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1548 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 241 [2021-11-23 02:47:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1187 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 231 [2021-11-23 02:47:02,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 310 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 101 [2021-11-23 02:47:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 121 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 61 [2021-11-23 02:47:03,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1242 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 226 [2021-11-23 02:47:26,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:47:26,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:49:18,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:19,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 02:49:19,011 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 02:49:19,014 INFO L158 Benchmark]: Toolchain (without parser) took 164885.81ms. Allocated memory was 98.6MB in the beginning and 950.0MB in the end (delta: 851.4MB). Free memory was 56.3MB in the beginning and 748.8MB in the end (delta: -692.5MB). Peak memory consumption was 159.2MB. Max. memory is 16.1GB. [2021-11-23 02:49:19,014 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 98.6MB. Free memory was 70.4MB in the beginning and 70.3MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:49:19,015 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2408.04ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 56.1MB in the beginning and 84.5MB in the end (delta: -28.4MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. [2021-11-23 02:49:19,015 INFO L158 Benchmark]: Boogie Procedure Inliner took 284.64ms. Allocated memory is still 138.4MB. Free memory was 84.5MB in the beginning and 72.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:49:19,015 INFO L158 Benchmark]: Boogie Preprocessor took 240.95ms. Allocated memory is still 138.4MB. Free memory was 72.6MB in the beginning and 59.3MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:49:19,016 INFO L158 Benchmark]: RCFGBuilder took 3830.51ms. Allocated memory was 138.4MB in the beginning and 218.1MB in the end (delta: 79.7MB). Free memory was 59.3MB in the beginning and 120.0MB in the end (delta: -60.7MB). Peak memory consumption was 67.7MB. Max. memory is 16.1GB. [2021-11-23 02:49:19,016 INFO L158 Benchmark]: TraceAbstraction took 158112.38ms. Allocated memory was 218.1MB in the beginning and 950.0MB in the end (delta: 731.9MB). Free memory was 118.9MB in the beginning and 748.8MB in the end (delta: -629.8MB). Peak memory consumption was 103.1MB. Max. memory is 16.1GB. [2021-11-23 02:49:19,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 98.6MB. Free memory was 70.4MB in the beginning and 70.3MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2408.04ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 56.1MB in the beginning and 84.5MB in the end (delta: -28.4MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 284.64ms. Allocated memory is still 138.4MB. Free memory was 84.5MB in the beginning and 72.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 240.95ms. Allocated memory is still 138.4MB. Free memory was 72.6MB in the beginning and 59.3MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 3830.51ms. Allocated memory was 138.4MB in the beginning and 218.1MB in the end (delta: 79.7MB). Free memory was 59.3MB in the beginning and 120.0MB in the end (delta: -60.7MB). Peak memory consumption was 67.7MB. Max. memory is 16.1GB. * TraceAbstraction took 158112.38ms. Allocated memory was 218.1MB in the beginning and 950.0MB in the end (delta: 731.9MB). Free memory was 118.9MB in the beginning and 748.8MB in the end (delta: -629.8MB). Peak memory consumption was 103.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 02:49:19,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/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_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/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 f3090fd14639372da088dcbc149768c93516e312be941c28b3a0b4b80aaee842 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:49:21,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:49:21,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:49:21,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:49:21,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:49:21,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:49:21,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:49:21,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:49:21,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:49:21,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:49:21,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:49:21,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:49:21,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:49:21,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:49:21,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:49:21,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:49:21,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:49:21,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:49:21,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:49:21,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:49:21,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:49:21,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:49:21,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:49:21,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:49:21,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:49:21,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:49:21,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:49:21,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:49:21,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:49:21,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:49:21,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:49:21,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:49:21,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:49:21,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:49:21,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:49:21,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:49:21,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:49:21,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:49:21,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:49:21,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:49:21,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:49:21,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-23 02:49:21,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:49:21,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:49:21,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:49:21,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:49:21,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:49:21,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:49:21,916 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:49:21,916 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:49:21,917 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:49:21,917 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:49:21,917 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:49:21,917 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:49:21,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:49:21,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:49:21,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:49:21,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:49:21,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:49:21,920 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:49:21,920 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:49:21,920 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:49:21,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:49:21,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:49:21,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:49:21,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:49:21,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:49:21,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:49:21,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:49:21,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:49:21,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:49:21,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:49:21,923 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:49:21,924 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:21,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:49:21,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:49:21,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:49:21,925 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_da248648-6896-4ffd-9352-0ab644db6258/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3090fd14639372da088dcbc149768c93516e312be941c28b3a0b4b80aaee842 [2021-11-23 02:49:22,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:49:22,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:49:22,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:49:22,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:49:22,402 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:49:22,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i [2021-11-23 02:49:22,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/df3e3bebc/02e4b32001be418c9e3855847c63fb5b/FLAG3b3eec3f3 [2021-11-23 02:49:23,529 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:49:23,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i [2021-11-23 02:49:23,589 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/df3e3bebc/02e4b32001be418c9e3855847c63fb5b/FLAG3b3eec3f3 [2021-11-23 02:49:23,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/data/df3e3bebc/02e4b32001be418c9e3855847c63fb5b [2021-11-23 02:49:23,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:49:23,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:49:23,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:49:23,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:49:23,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:49:23,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:49:23" (1/1) ... [2021-11-23 02:49:23,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d26f164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:23, skipping insertion in model container [2021-11-23 02:49:23,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:49:23" (1/1) ... [2021-11-23 02:49:23,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:49:24,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:49:25,201 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_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i[159323,159336] [2021-11-23 02:49:25,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:49:25,335 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:49:25,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:49:25,727 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_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i[159323,159336] [2021-11-23 02:49:25,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:49:25,763 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:49:26,004 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_da248648-6896-4ffd-9352-0ab644db6258/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i[159323,159336] [2021-11-23 02:49:26,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:49:26,104 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:49:26,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26 WrapperNode [2021-11-23 02:49:26,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:49:26,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:49:26,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:49:26,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:49:26,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,364 INFO L137 Inliner]: procedures = 146, calls = 748, calls flagged for inlining = 45, calls inlined = 42, statements flattened = 2096 [2021-11-23 02:49:26,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:49:26,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:49:26,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:49:26,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:49:26,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:49:26,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:49:26,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:49:26,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:49:26,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (1/1) ... [2021-11-23 02:49:26,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:49:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:26,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:49:26,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:49:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 02:49:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 02:49:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 02:49:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 02:49:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 02:49:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 02:49:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 02:49:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 02:49:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:49:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:49:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-23 02:49:26,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:49:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-23 02:49:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-23 02:49:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:49:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:49:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:49:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:49:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 02:49:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 02:49:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:49:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:49:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:49:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:49:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-23 02:49:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-23 02:49:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:49:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:49:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure iowarrior_init [2021-11-23 02:49:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure iowarrior_init [2021-11-23 02:49:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:49:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:49:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:49:26,726 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:49:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2021-11-23 02:49:26,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2021-11-23 02:49:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-23 02:49:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-23 02:49:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-23 02:49:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-23 02:49:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-23 02:49:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-23 02:49:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:49:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:49:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:49:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:49:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:49:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure iowarrior_exit [2021-11-23 02:49:26,729 INFO L138 BoogieDeclarations]: Found implementation of procedure iowarrior_exit [2021-11-23 02:49:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure iowarrior_delete [2021-11-23 02:49:26,731 INFO L138 BoogieDeclarations]: Found implementation of procedure iowarrior_delete [2021-11-23 02:49:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:49:26,732 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:49:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:49:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-11-23 02:49:26,732 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-11-23 02:49:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:49:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:49:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:49:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-23 02:49:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-23 02:49:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-23 02:49:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_report [2021-11-23 02:49:26,734 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_report [2021-11-23 02:49:26,735 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-23 02:49:26,735 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-23 02:49:26,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:49:26,735 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-23 02:49:26,736 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-23 02:49:26,737 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-23 02:49:26,737 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-23 02:49:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:49:26,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:49:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 02:49:26,738 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 02:49:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 02:49:26,739 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 02:49:26,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 02:49:26,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-23 02:49:26,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-23 02:49:26,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-23 02:49:26,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:49:26,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:49:26,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:49:26,741 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:49:26,741 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:49:26,741 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-23 02:49:26,742 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-23 02:49:26,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-23 02:49:26,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:49:26,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 02:49:26,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-23 02:49:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:49:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:49:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:49:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:49:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:49:26,746 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:49:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:49:26,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:49:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-23 02:49:26,746 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-23 02:49:26,747 INFO L130 BoogieDeclarations]: Found specification of procedure read_index [2021-11-23 02:49:26,747 INFO L138 BoogieDeclarations]: Found implementation of procedure read_index [2021-11-23 02:49:26,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2021-11-23 02:49:26,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2021-11-23 02:49:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-23 02:49:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:49:26,748 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:49:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-23 02:49:26,750 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-23 02:49:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 02:49:26,753 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 02:49:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:49:26,753 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:49:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:49:26,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:49:27,430 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:49:27,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:49:29,946 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:49:29,968 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2021-11-23 02:49:29,968 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2021-11-23 02:49:32,309 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2021-11-23 02:49:32,491 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:49:32,501 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:49:32,511 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:49:38,893 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##275: assume !false; [2021-11-23 02:49:38,893 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##274: assume false; [2021-11-23 02:49:38,893 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2021-11-23 02:49:38,893 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2021-11-23 02:49:38,894 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##154: assume !false; [2021-11-23 02:49:38,894 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##153: assume false; [2021-11-23 02:49:38,988 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:49:39,007 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:49:39,007 INFO L301 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-23 02:49:39,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:39 BoogieIcfgContainer [2021-11-23 02:49:39,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:49:39,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:49:39,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:49:39,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:49:39,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:49:23" (1/3) ... [2021-11-23 02:49:39,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa3473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:39, skipping insertion in model container [2021-11-23 02:49:39,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:26" (2/3) ... [2021-11-23 02:49:39,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa3473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:39, skipping insertion in model container [2021-11-23 02:49:39,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:39" (3/3) ... [2021-11-23 02:49:39,020 INFO L111 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-usb-misc-iowarrior.ko.cil.out.i [2021-11-23 02:49:39,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:49:39,028 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:49:39,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:49:39,107 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 02:49:39,107 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:49:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 633 states, 448 states have (on average 1.4419642857142858) internal successors, (646), 471 states have internal predecessors, (646), 141 states have call successors, (141), 43 states have call predecessors, (141), 42 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-11-23 02:49:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:49:39,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:39,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:39,153 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1746931262, now seen corresponding path program 1 times [2021-11-23 02:49:39,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135978667] [2021-11-23 02:49:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:39,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:39,182 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:39,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:49:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:49:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:40,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:40,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135978667] [2021-11-23 02:49:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135978667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:40,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:40,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-23 02:49:40,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772143664] [2021-11-23 02:49:40,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:40,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:49:40,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:49:40,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:40,407 INFO L87 Difference]: Start difference. First operand has 633 states, 448 states have (on average 1.4419642857142858) internal successors, (646), 471 states have internal predecessors, (646), 141 states have call successors, (141), 43 states have call predecessors, (141), 42 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:49:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:40,702 INFO L93 Difference]: Finished difference Result 1825 states and 2714 transitions. [2021-11-23 02:49:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:49:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-23 02:49:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:40,736 INFO L225 Difference]: With dead ends: 1825 [2021-11-23 02:49:40,736 INFO L226 Difference]: Without dead ends: 1193 [2021-11-23 02:49:40,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 02:49:40,763 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 820 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:40,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1845 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:49:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-11-23 02:49:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1189. [2021-11-23 02:49:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 844 states have (on average 1.3139810426540284) internal successors, (1109), 874 states have internal predecessors, (1109), 265 states have call successors, (265), 80 states have call predecessors, (265), 79 states have return successors, (263), 249 states have call predecessors, (263), 261 states have call successors, (263) [2021-11-23 02:49:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1637 transitions. [2021-11-23 02:49:41,052 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1637 transitions. Word has length 15 [2021-11-23 02:49:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:41,055 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1637 transitions. [2021-11-23 02:49:41,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:49:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1637 transitions. [2021-11-23 02:49:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:49:41,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:41,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:41,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 02:49:41,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:41,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:41,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1679402514, now seen corresponding path program 1 times [2021-11-23 02:49:41,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:41,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264440283] [2021-11-23 02:49:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:41,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:41,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:41,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:41,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:49:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:49:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:42,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:42,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:42,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264440283] [2021-11-23 02:49:42,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264440283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:42,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:42,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-23 02:49:42,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265388799] [2021-11-23 02:49:42,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:49:42,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:49:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:42,425 INFO L87 Difference]: Start difference. First operand 1189 states and 1637 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:49:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:42,641 INFO L93 Difference]: Finished difference Result 3542 states and 4886 transitions. [2021-11-23 02:49:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:49:42,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-23 02:49:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:42,679 INFO L225 Difference]: With dead ends: 3542 [2021-11-23 02:49:42,679 INFO L226 Difference]: Without dead ends: 2356 [2021-11-23 02:49:42,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 02:49:42,688 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 810 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:42,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1768 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:49:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-11-23 02:49:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2349. [2021-11-23 02:49:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 1668 states have (on average 1.3117505995203838) internal successors, (2188), 1723 states have internal predecessors, (2188), 524 states have call successors, (524), 157 states have call predecessors, (524), 156 states have return successors, (524), 496 states have call predecessors, (524), 520 states have call successors, (524) [2021-11-23 02:49:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3236 transitions. [2021-11-23 02:49:42,945 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3236 transitions. Word has length 16 [2021-11-23 02:49:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:42,946 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3236 transitions. [2021-11-23 02:49:42,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:49:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3236 transitions. [2021-11-23 02:49:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:49:42,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:42,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:49:43,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:43,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:43,190 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 627657167, now seen corresponding path program 1 times [2021-11-23 02:49:43,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:43,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735123564] [2021-11-23 02:49:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:43,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:43,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:43,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:49:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:49:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:44,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:44,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735123564] [2021-11-23 02:49:44,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735123564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:44,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:44,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:49:44,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445062667] [2021-11-23 02:49:44,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:44,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:49:44,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:49:44,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:49:44,644 INFO L87 Difference]: Start difference. First operand 2349 states and 3236 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:49:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:45,921 INFO L93 Difference]: Finished difference Result 6199 states and 8799 transitions. [2021-11-23 02:49:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:49:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-11-23 02:49:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:45,959 INFO L225 Difference]: With dead ends: 6199 [2021-11-23 02:49:45,959 INFO L226 Difference]: Without dead ends: 3861 [2021-11-23 02:49:45,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 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 02:49:45,973 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 747 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:45,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 1863 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:49:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-11-23 02:49:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3837. [2021-11-23 02:49:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 2772 states have (on average 1.3340548340548342) internal successors, (3698), 2843 states have internal predecessors, (3698), 908 states have call successors, (908), 157 states have call predecessors, (908), 156 states have return successors, (912), 872 states have call predecessors, (912), 904 states have call successors, (912) [2021-11-23 02:49:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 5518 transitions. [2021-11-23 02:49:46,330 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 5518 transitions. Word has length 54 [2021-11-23 02:49:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:46,330 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 5518 transitions. [2021-11-23 02:49:46,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:49:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 5518 transitions. [2021-11-23 02:49:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:49:46,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:46,339 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:49:46,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:46,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:46,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash -136231158, now seen corresponding path program 1 times [2021-11-23 02:49:46,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437780493] [2021-11-23 02:49:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:46,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:46,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:46,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:49:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:49:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:47,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:48,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:48,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437780493] [2021-11-23 02:49:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437780493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:48,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:48,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:49:48,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853358151] [2021-11-23 02:49:48,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:48,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:49:48,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:48,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:49:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:49:48,155 INFO L87 Difference]: Start difference. First operand 3837 states and 5518 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:49:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:49,235 INFO L93 Difference]: Finished difference Result 11303 states and 16837 transitions. [2021-11-23 02:49:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:49:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 82 [2021-11-23 02:49:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:49,312 INFO L225 Difference]: With dead ends: 11303 [2021-11-23 02:49:49,313 INFO L226 Difference]: Without dead ends: 7475 [2021-11-23 02:49:49,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 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 02:49:49,333 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 658 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:49,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 2624 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:49:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7475 states. [2021-11-23 02:49:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7475 to 7451. [2021-11-23 02:49:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7451 states, 5514 states have (on average 1.3939064200217628) internal successors, (7686), 5673 states have internal predecessors, (7686), 1780 states have call successors, (1780), 157 states have call predecessors, (1780), 156 states have return successors, (1788), 1704 states have call predecessors, (1788), 1776 states have call successors, (1788) [2021-11-23 02:49:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7451 states to 7451 states and 11254 transitions. [2021-11-23 02:49:50,047 INFO L78 Accepts]: Start accepts. Automaton has 7451 states and 11254 transitions. Word has length 82 [2021-11-23 02:49:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:50,048 INFO L470 AbstractCegarLoop]: Abstraction has 7451 states and 11254 transitions. [2021-11-23 02:49:50,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:49:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7451 states and 11254 transitions. [2021-11-23 02:49:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:49:50,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:50,055 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:49:50,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:50,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:50,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1744360749, now seen corresponding path program 1 times [2021-11-23 02:49:50,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877936108] [2021-11-23 02:49:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:50,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:50,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:50,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:50,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:49:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:49:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:52,714 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 02:49:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 26 [2021-11-23 02:49:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:49:53,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:49:54,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877936108] [2021-11-23 02:49:54,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877936108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:54,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:54,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-23 02:49:54,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593398308] [2021-11-23 02:49:54,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:54,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:49:54,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:54,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:49:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:49:54,083 INFO L87 Difference]: Start difference. First operand 7451 states and 11254 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:49:59,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:01,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:03,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:06,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:08,636 INFO L93 Difference]: Finished difference Result 20441 states and 30950 transitions. [2021-11-23 02:50:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:50:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 102 [2021-11-23 02:50:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:08,780 INFO L225 Difference]: With dead ends: 20441 [2021-11-23 02:50:08,781 INFO L226 Difference]: Without dead ends: 13001 [2021-11-23 02:50:08,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:08,814 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 540 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:08,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 2500 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 199 Invalid, 2 Unknown, 0 Unchecked, 13.6s Time] [2021-11-23 02:50:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13001 states. [2021-11-23 02:50:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13001 to 12851. [2021-11-23 02:50:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12851 states, 9570 states have (on average 1.4076280041797282) internal successors, (13471), 9837 states have internal predecessors, (13471), 3012 states have call successors, (3012), 269 states have call predecessors, (3012), 268 states have return successors, (3026), 2852 states have call predecessors, (3026), 3008 states have call successors, (3026) [2021-11-23 02:50:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12851 states to 12851 states and 19509 transitions. [2021-11-23 02:50:09,898 INFO L78 Accepts]: Start accepts. Automaton has 12851 states and 19509 transitions. Word has length 102 [2021-11-23 02:50:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:09,899 INFO L470 AbstractCegarLoop]: Abstraction has 12851 states and 19509 transitions. [2021-11-23 02:50:09,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:50:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 12851 states and 19509 transitions. [2021-11-23 02:50:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:50:09,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:09,906 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:50:09,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 02:50:10,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:10,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1225750353, now seen corresponding path program 1 times [2021-11-23 02:50:10,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:10,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268479149] [2021-11-23 02:50:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:10,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:10,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:10,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:10,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:50:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:50:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:50:11,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:50:11,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:11,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268479149] [2021-11-23 02:50:11,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268479149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:11,982 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:11,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:50:11,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209129864] [2021-11-23 02:50:11,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:11,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:11,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:11,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:11,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:50:11,984 INFO L87 Difference]: Start difference. First operand 12851 states and 19509 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-23 02:50:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:13,020 INFO L93 Difference]: Finished difference Result 25839 states and 39189 transitions. [2021-11-23 02:50:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:50:13,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 102 [2021-11-23 02:50:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:13,086 INFO L225 Difference]: With dead ends: 25839 [2021-11-23 02:50:13,087 INFO L226 Difference]: Without dead ends: 12945 [2021-11-23 02:50:13,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:50:13,131 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 36 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3325 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:13,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3325 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:50:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12945 states. [2021-11-23 02:50:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12945 to 12773. [2021-11-23 02:50:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12773 states, 9540 states have (on average 1.4076519916142558) internal successors, (13429), 9813 states have internal predecessors, (13429), 2961 states have call successors, (2961), 272 states have call predecessors, (2961), 271 states have return successors, (2975), 2795 states have call predecessors, (2975), 2957 states have call successors, (2975) [2021-11-23 02:50:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12773 states to 12773 states and 19365 transitions. [2021-11-23 02:50:14,022 INFO L78 Accepts]: Start accepts. Automaton has 12773 states and 19365 transitions. Word has length 102 [2021-11-23 02:50:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 12773 states and 19365 transitions. [2021-11-23 02:50:14,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-23 02:50:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 12773 states and 19365 transitions. [2021-11-23 02:50:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 02:50:14,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:14,034 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:50:14,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:14,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:14,250 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 973286060, now seen corresponding path program 1 times [2021-11-23 02:50:14,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:14,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298846211] [2021-11-23 02:50:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:14,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:14,254 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:14,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:50:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:15,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:50:15,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:50:15,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:50:15,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298846211] [2021-11-23 02:50:15,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298846211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:15,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:15,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 02:50:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326665500] [2021-11-23 02:50:15,767 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:15,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:50:15,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:15,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:50:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:50:15,769 INFO L87 Difference]: Start difference. First operand 12773 states and 19365 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-23 02:50:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:16,782 INFO L93 Difference]: Finished difference Result 22527 states and 33865 transitions. [2021-11-23 02:50:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:50:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 124 [2021-11-23 02:50:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:16,828 INFO L225 Difference]: With dead ends: 22527 [2021-11-23 02:50:16,829 INFO L226 Difference]: Without dead ends: 9723 [2021-11-23 02:50:16,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:50:16,861 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 198 mSDsluCounter, 4078 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 4914 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:16,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 4914 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9723 states. [2021-11-23 02:50:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9723 to 9502. [2021-11-23 02:50:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 7063 states have (on average 1.388078720090613) internal successors, (9804), 7265 states have internal predecessors, (9804), 2168 states have call successors, (2168), 271 states have call predecessors, (2168), 270 states have return successors, (2177), 2049 states have call predecessors, (2177), 2163 states have call successors, (2177) [2021-11-23 02:50:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 14149 transitions. [2021-11-23 02:50:17,532 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 14149 transitions. Word has length 124 [2021-11-23 02:50:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:17,533 INFO L470 AbstractCegarLoop]: Abstraction has 9502 states and 14149 transitions. [2021-11-23 02:50:17,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-23 02:50:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 14149 transitions. [2021-11-23 02:50:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:50:17,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:17,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-23 02:50:17,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:17,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:17,754 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1605305614, now seen corresponding path program 1 times [2021-11-23 02:50:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204601815] [2021-11-23 02:50:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:17,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:17,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:17,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:50:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:18,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:50:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:50:19,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:50:21,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:21,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204601815] [2021-11-23 02:50:21,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204601815] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:21,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:21,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-23 02:50:21,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920985823] [2021-11-23 02:50:21,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:21,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:50:21,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:21,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:50:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:50:21,370 INFO L87 Difference]: Start difference. First operand 9502 states and 14149 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:50:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:22,479 INFO L93 Difference]: Finished difference Result 17025 states and 25574 transitions. [2021-11-23 02:50:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:50:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 125 [2021-11-23 02:50:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:22,527 INFO L225 Difference]: With dead ends: 17025 [2021-11-23 02:50:22,527 INFO L226 Difference]: Without dead ends: 9613 [2021-11-23 02:50:22,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:50:22,549 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 9 mSDsluCounter, 6633 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7467 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:22,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 7467 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:50:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9613 states. [2021-11-23 02:50:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9613 to 9580. [2021-11-23 02:50:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9580 states, 7117 states have (on average 1.3851341857524238) internal successors, (9858), 7324 states have internal predecessors, (9858), 2168 states have call successors, (2168), 271 states have call predecessors, (2168), 294 states have return successors, (2331), 2068 states have call predecessors, (2331), 2163 states have call successors, (2331) [2021-11-23 02:50:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9580 states to 9580 states and 14357 transitions. [2021-11-23 02:50:23,187 INFO L78 Accepts]: Start accepts. Automaton has 9580 states and 14357 transitions. Word has length 125 [2021-11-23 02:50:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:23,187 INFO L470 AbstractCegarLoop]: Abstraction has 9580 states and 14357 transitions. [2021-11-23 02:50:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:50:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 9580 states and 14357 transitions. [2021-11-23 02:50:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:50:23,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:23,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 02:50:23,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:23,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:23,406 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -666773999, now seen corresponding path program 1 times [2021-11-23 02:50:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294541419] [2021-11-23 02:50:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:23,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:23,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:23,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:50:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:50:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:24,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:50:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:50:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 02:50:25,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 02:50:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 02:50:25,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 02:50:27,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:27,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294541419] [2021-11-23 02:50:27,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294541419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:27,012 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:27,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2021-11-23 02:50:27,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721866151] [2021-11-23 02:50:27,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:27,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:50:27,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:27,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:50:27,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:50:27,014 INFO L87 Difference]: Start difference. First operand 9580 states and 14357 transitions. Second operand has 19 states, 17 states have (on average 5.705882352941177) internal successors, (97), 13 states have internal predecessors, (97), 8 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:50:32,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:34,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:36,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:38,205 INFO L93 Difference]: Finished difference Result 9805 states and 14655 transitions. [2021-11-23 02:50:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:50:38,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.705882352941177) internal successors, (97), 13 states have internal predecessors, (97), 8 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) Word has length 125 [2021-11-23 02:50:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:38,247 INFO L225 Difference]: With dead ends: 9805 [2021-11-23 02:50:38,247 INFO L226 Difference]: Without dead ends: 9644 [2021-11-23 02:50:38,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:50:38,255 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 40 mSDsluCounter, 9681 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 10510 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:38,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 10510 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 3 Unknown, 64 Unchecked, 10.4s Time] [2021-11-23 02:50:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9644 states. [2021-11-23 02:50:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9644 to 9618. [2021-11-23 02:50:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9618 states, 7145 states have (on average 1.3819454163750875) internal successors, (9874), 7350 states have internal predecessors, (9874), 2174 states have call successors, (2174), 271 states have call predecessors, (2174), 298 states have return successors, (2357), 2080 states have call predecessors, (2357), 2169 states have call successors, (2357) [2021-11-23 02:50:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9618 states to 9618 states and 14405 transitions. [2021-11-23 02:50:38,750 INFO L78 Accepts]: Start accepts. Automaton has 9618 states and 14405 transitions. Word has length 125 [2021-11-23 02:50:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:38,751 INFO L470 AbstractCegarLoop]: Abstraction has 9618 states and 14405 transitions. [2021-11-23 02:50:38,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.705882352941177) internal successors, (97), 13 states have internal predecessors, (97), 8 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:50:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9618 states and 14405 transitions. [2021-11-23 02:50:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:50:38,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:38,756 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 02:50:38,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:38,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:38,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -733780752, now seen corresponding path program 1 times [2021-11-23 02:50:38,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108133615] [2021-11-23 02:50:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:38,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:38,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:38,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:39,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:50:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:50:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:50:40,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:50:41,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:41,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108133615] [2021-11-23 02:50:41,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108133615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:41,431 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:41,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-23 02:50:41,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073451640] [2021-11-23 02:50:41,431 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:41,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:50:41,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:50:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:50:41,433 INFO L87 Difference]: Start difference. First operand 9618 states and 14405 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:50:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:41,877 INFO L93 Difference]: Finished difference Result 14504 states and 21772 transitions. [2021-11-23 02:50:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:50:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) Word has length 125 [2021-11-23 02:50:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:41,929 INFO L225 Difference]: With dead ends: 14504 [2021-11-23 02:50:41,929 INFO L226 Difference]: Without dead ends: 9658 [2021-11-23 02:50:41,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:50:41,949 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 2 mSDsluCounter, 4121 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4946 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:41,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4946 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:50:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9658 states. [2021-11-23 02:50:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9658 to 9658. [2021-11-23 02:50:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9658 states, 7177 states have (on average 1.380242441131392) internal successors, (9906), 7374 states have internal predecessors, (9906), 2174 states have call successors, (2174), 271 states have call predecessors, (2174), 306 states have return successors, (2381), 2096 states have call predecessors, (2381), 2169 states have call successors, (2381) [2021-11-23 02:50:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9658 states to 9658 states and 14461 transitions. [2021-11-23 02:50:42,613 INFO L78 Accepts]: Start accepts. Automaton has 9658 states and 14461 transitions. Word has length 125 [2021-11-23 02:50:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:42,614 INFO L470 AbstractCegarLoop]: Abstraction has 9658 states and 14461 transitions. [2021-11-23 02:50:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:50:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9658 states and 14461 transitions. [2021-11-23 02:50:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:50:42,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:42,619 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-23 02:50:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:42,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:42,842 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash -382980815, now seen corresponding path program 1 times [2021-11-23 02:50:42,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:42,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363137563] [2021-11-23 02:50:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:42,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:42,846 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:42,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:50:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:50:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:50:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:50:45,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363137563] [2021-11-23 02:50:45,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363137563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:45,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:45,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 10 [2021-11-23 02:50:45,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347019311] [2021-11-23 02:50:45,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:45,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:50:45,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:50:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:50:45,197 INFO L87 Difference]: Start difference. First operand 9658 states and 14461 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (16), 5 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:50:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:45,987 INFO L93 Difference]: Finished difference Result 19305 states and 28939 transitions. [2021-11-23 02:50:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:50:45,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (16), 5 states have call predecessors, (16), 2 states have call successors, (16) Word has length 125 [2021-11-23 02:50:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:46,031 INFO L225 Difference]: With dead ends: 19305 [2021-11-23 02:50:46,031 INFO L226 Difference]: Without dead ends: 9658 [2021-11-23 02:50:46,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:50:46,055 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 2 mSDsluCounter, 6659 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7494 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:46,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7494 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:50:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9658 states. [2021-11-23 02:50:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9658 to 9650. [2021-11-23 02:50:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9650 states, 7169 states have (on average 1.3787139071000138) internal successors, (9884), 7370 states have internal predecessors, (9884), 2174 states have call successors, (2174), 271 states have call predecessors, (2174), 306 states have return successors, (2381), 2092 states have call predecessors, (2381), 2169 states have call successors, (2381) [2021-11-23 02:50:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9650 states to 9650 states and 14439 transitions. [2021-11-23 02:50:46,565 INFO L78 Accepts]: Start accepts. Automaton has 9650 states and 14439 transitions. Word has length 125 [2021-11-23 02:50:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:46,566 INFO L470 AbstractCegarLoop]: Abstraction has 9650 states and 14439 transitions. [2021-11-23 02:50:46,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (16), 5 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:50:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 9650 states and 14439 transitions. [2021-11-23 02:50:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 02:50:46,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:46,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:46,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:46,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:46,798 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1936255599, now seen corresponding path program 1 times [2021-11-23 02:50:46,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:46,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471776563] [2021-11-23 02:50:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:46,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:46,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:46,801 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:46,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:50:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:50:48,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:50:48,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:50:49,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:49,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471776563] [2021-11-23 02:50:49,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471776563] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:49,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:49,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-23 02:50:49,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375361228] [2021-11-23 02:50:49,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:49,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:50:49,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:50:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:50:49,577 INFO L87 Difference]: Start difference. First operand 9650 states and 14439 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:50:52,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:54,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:58,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:02,767 INFO L93 Difference]: Finished difference Result 19342 states and 29037 transitions. [2021-11-23 02:51:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:51:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 138 [2021-11-23 02:51:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:02,846 INFO L225 Difference]: With dead ends: 19342 [2021-11-23 02:51:02,847 INFO L226 Difference]: Without dead ends: 19337 [2021-11-23 02:51:02,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:51:02,859 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 2315 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 609 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2435 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:02,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2435 Valid, 2849 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 1483 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2021-11-23 02:51:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-11-23 02:51:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 19204. [2021-11-23 02:51:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19204 states, 14261 states have (on average 1.382792230558867) internal successors, (19720), 14676 states have internal predecessors, (19720), 4340 states have call successors, (4340), 531 states have call predecessors, (4340), 602 states have return successors, (4833), 4164 states have call predecessors, (4833), 4335 states have call successors, (4833) [2021-11-23 02:51:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19204 states to 19204 states and 28893 transitions. [2021-11-23 02:51:03,965 INFO L78 Accepts]: Start accepts. Automaton has 19204 states and 28893 transitions. Word has length 138 [2021-11-23 02:51:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:03,966 INFO L470 AbstractCegarLoop]: Abstraction has 19204 states and 28893 transitions. [2021-11-23 02:51:03,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:51:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19204 states and 28893 transitions. [2021-11-23 02:51:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 02:51:03,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:03,973 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:04,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:04,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:51:04,198 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash 353141689, now seen corresponding path program 1 times [2021-11-23 02:51:04,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:04,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509934339] [2021-11-23 02:51:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:04,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:04,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:04,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:04,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:51:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:51:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:51:05,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:51:06,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:06,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509934339] [2021-11-23 02:51:06,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509934339] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:51:06,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:51:06,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 02:51:06,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706960556] [2021-11-23 02:51:06,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:06,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:06,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:06,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:06,067 INFO L87 Difference]: Start difference. First operand 19204 states and 28893 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:51:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:06,725 INFO L93 Difference]: Finished difference Result 38552 states and 57986 transitions. [2021-11-23 02:51:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:51:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-23 02:51:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:06,792 INFO L225 Difference]: With dead ends: 38552 [2021-11-23 02:51:06,793 INFO L226 Difference]: Without dead ends: 19347 [2021-11-23 02:51:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:51:06,843 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 22 mSDsluCounter, 3336 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4176 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:06,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 4176 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19347 states. [2021-11-23 02:51:07,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19347 to 19246. [2021-11-23 02:51:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19246 states, 14303 states have (on average 1.3816681815003846) internal successors, (19762), 14704 states have internal predecessors, (19762), 4340 states have call successors, (4340), 531 states have call predecessors, (4340), 602 states have return successors, (4829), 4178 states have call predecessors, (4829), 4335 states have call successors, (4829) [2021-11-23 02:51:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19246 states to 19246 states and 28931 transitions. [2021-11-23 02:51:08,006 INFO L78 Accepts]: Start accepts. Automaton has 19246 states and 28931 transitions. Word has length 133 [2021-11-23 02:51:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:08,006 INFO L470 AbstractCegarLoop]: Abstraction has 19246 states and 28931 transitions. [2021-11-23 02:51:08,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:51:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 19246 states and 28931 transitions. [2021-11-23 02:51:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 02:51:08,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:08,013 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-11-23 02:51:08,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:08,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:51:08,239 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 412362426, now seen corresponding path program 1 times [2021-11-23 02:51:08,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:08,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380376735] [2021-11-23 02:51:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:08,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:08,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:08,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:51:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:51:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:51:09,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:51:10,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380376735] [2021-11-23 02:51:10,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380376735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:10,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:10,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-23 02:51:10,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146469489] [2021-11-23 02:51:10,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:10,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:51:10,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:51:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:10,392 INFO L87 Difference]: Start difference. First operand 19246 states and 28931 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:51:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:11,569 INFO L93 Difference]: Finished difference Result 38621 states and 58063 transitions. [2021-11-23 02:51:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:51:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 133 [2021-11-23 02:51:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:11,647 INFO L225 Difference]: With dead ends: 38621 [2021-11-23 02:51:11,647 INFO L226 Difference]: Without dead ends: 19374 [2021-11-23 02:51:11,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:51:11,695 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 21 mSDsluCounter, 4967 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5801 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:11,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 5801 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:51:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19374 states. [2021-11-23 02:51:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19374 to 19334. [2021-11-23 02:51:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19334 states, 14376 states have (on average 1.3797301057317752) internal successors, (19835), 14763 states have internal predecessors, (19835), 4340 states have call successors, (4340), 531 states have call predecessors, (4340), 617 states have return successors, (4880), 4207 states have call predecessors, (4880), 4335 states have call successors, (4880) [2021-11-23 02:51:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19334 states to 19334 states and 29055 transitions. [2021-11-23 02:51:12,824 INFO L78 Accepts]: Start accepts. Automaton has 19334 states and 29055 transitions. Word has length 133 [2021-11-23 02:51:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:12,824 INFO L470 AbstractCegarLoop]: Abstraction has 19334 states and 29055 transitions. [2021-11-23 02:51:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:51:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19334 states and 29055 transitions. [2021-11-23 02:51:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 02:51:12,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:12,833 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:12,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:13,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:51:13,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash -557928581, now seen corresponding path program 1 times [2021-11-23 02:51:13,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493559716] [2021-11-23 02:51:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:13,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:13,050 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:13,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:51:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:51:13,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:51:14,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 02:51:14,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:14,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493559716] [2021-11-23 02:51:14,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493559716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:14,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:14,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 02:51:14,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037995041] [2021-11-23 02:51:14,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:14,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:51:14,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:51:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:14,612 INFO L87 Difference]: Start difference. First operand 19334 states and 29055 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-23 02:51:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:15,668 INFO L93 Difference]: Finished difference Result 34946 states and 52743 transitions. [2021-11-23 02:51:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:51:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 133 [2021-11-23 02:51:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:15,717 INFO L225 Difference]: With dead ends: 34946 [2021-11-23 02:51:15,717 INFO L226 Difference]: Without dead ends: 15563 [2021-11-23 02:51:15,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:51:15,756 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 61 mSDsluCounter, 4217 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 5074 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:15,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 5074 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:51:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-11-23 02:51:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 15208. [2021-11-23 02:51:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15208 states, 11292 states have (on average 1.3839001062699257) internal successors, (15627), 11590 states have internal predecessors, (15627), 3536 states have call successors, (3536), 333 states have call predecessors, (3536), 379 states have return successors, (3945), 3436 states have call predecessors, (3945), 3531 states have call successors, (3945) [2021-11-23 02:51:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15208 states to 15208 states and 23108 transitions. [2021-11-23 02:51:16,789 INFO L78 Accepts]: Start accepts. Automaton has 15208 states and 23108 transitions. Word has length 133 [2021-11-23 02:51:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 15208 states and 23108 transitions. [2021-11-23 02:51:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 6 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-23 02:51:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15208 states and 23108 transitions. [2021-11-23 02:51:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 02:51:16,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:16,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-23 02:51:16,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:17,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:51:17,023 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:17,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2121292546, now seen corresponding path program 1 times [2021-11-23 02:51:17,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:17,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830185823] [2021-11-23 02:51:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:17,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:17,025 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:17,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:51:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:51:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:18,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 02:51:18,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:51:20,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-23 02:51:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 02:51:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:51:20,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:20,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2021-11-23 02:51:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:51:22,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830185823] [2021-11-23 02:51:22,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830185823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:22,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:22,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 20 [2021-11-23 02:51:22,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387966195] [2021-11-23 02:51:22,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:22,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:51:22,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:51:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:51:22,471 INFO L87 Difference]: Start difference. First operand 15208 states and 23108 transitions. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 16 states have internal predecessors, (123), 7 states have call successors, (29), 3 states have call predecessors, (29), 7 states have return successors, (28), 11 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-23 02:51:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:30,397 INFO L93 Difference]: Finished difference Result 56699 states and 88107 transitions. [2021-11-23 02:51:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:51:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 16 states have internal predecessors, (123), 7 states have call successors, (29), 3 states have call predecessors, (29), 7 states have return successors, (28), 11 states have call predecessors, (28), 7 states have call successors, (28) Word has length 139 [2021-11-23 02:51:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:30,542 INFO L225 Difference]: With dead ends: 56699 [2021-11-23 02:51:30,542 INFO L226 Difference]: Without dead ends: 41705 [2021-11-23 02:51:30,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:51:30,576 INFO L933 BasicCegarLoop]: 1639 mSDtfsCounter, 935 mSDsluCounter, 18293 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 19932 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 19932 Invalid, 864 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [86 Valid, 656 Invalid, 0 Unknown, 122 Unchecked, 4.5s Time] [2021-11-23 02:51:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41705 states. [2021-11-23 02:51:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41705 to 15752. [2021-11-23 02:51:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15752 states, 11820 states have (on average 1.395346869712352) internal successors, (16493), 12118 states have internal predecessors, (16493), 3536 states have call successors, (3536), 349 states have call predecessors, (3536), 395 states have return successors, (3945), 3436 states have call predecessors, (3945), 3531 states have call successors, (3945) [2021-11-23 02:51:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 23974 transitions. [2021-11-23 02:51:32,152 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 23974 transitions. Word has length 139 [2021-11-23 02:51:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 15752 states and 23974 transitions. [2021-11-23 02:51:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 16 states have internal predecessors, (123), 7 states have call successors, (29), 3 states have call predecessors, (29), 7 states have return successors, (28), 11 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-23 02:51:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 23974 transitions. [2021-11-23 02:51:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-23 02:51:32,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:32,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-23 02:51:32,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:32,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:51:32,361 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash -864748300, now seen corresponding path program 1 times [2021-11-23 02:51:32,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:32,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406432971] [2021-11-23 02:51:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:32,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:32,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:32,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:32,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 02:51:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:33,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:51:33,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:51:33,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-23 02:51:33,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:33,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406432971] [2021-11-23 02:51:33,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406432971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:33,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:33,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:51:33,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640315141] [2021-11-23 02:51:33,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:33,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:33,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:33,821 INFO L87 Difference]: Start difference. First operand 15752 states and 23974 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-23 02:51:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:35,088 INFO L93 Difference]: Finished difference Result 31546 states and 48015 transitions. [2021-11-23 02:51:35,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:51:35,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 140 [2021-11-23 02:51:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:35,132 INFO L225 Difference]: With dead ends: 31546 [2021-11-23 02:51:35,132 INFO L226 Difference]: Without dead ends: 15984 [2021-11-23 02:51:35,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:35,160 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 44 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4148 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:35,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 4148 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:51:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15984 states. [2021-11-23 02:51:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15984 to 15708. [2021-11-23 02:51:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15708 states, 11770 states have (on average 1.3915038232795243) internal successors, (16378), 12068 states have internal predecessors, (16378), 3539 states have call successors, (3539), 352 states have call predecessors, (3539), 398 states have return successors, (3948), 3439 states have call predecessors, (3948), 3534 states have call successors, (3948) [2021-11-23 02:51:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15708 states to 15708 states and 23865 transitions. [2021-11-23 02:51:36,200 INFO L78 Accepts]: Start accepts. Automaton has 15708 states and 23865 transitions. Word has length 140 [2021-11-23 02:51:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:36,200 INFO L470 AbstractCegarLoop]: Abstraction has 15708 states and 23865 transitions. [2021-11-23 02:51:36,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-23 02:51:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 15708 states and 23865 transitions. [2021-11-23 02:51:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 02:51:36,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:36,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-23 02:51:36,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:51:36,431 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash -536596717, now seen corresponding path program 1 times [2021-11-23 02:51:36,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26344312] [2021-11-23 02:51:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:36,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:36,433 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:36,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 02:51:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:51:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:51:37,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:51:38,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26344312] [2021-11-23 02:51:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26344312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086884077] [2021-11-23 02:51:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:38,298 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:51:38,306 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:51:38,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 02:51:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:51:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:39,690 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 02:51:39,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 20 [2021-11-23 02:51:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:51:41,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:51:44,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086884077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:44,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:51:44,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [4, 4] total 11 [2021-11-23 02:51:44,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860535135] [2021-11-23 02:51:44,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:44,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:51:44,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:51:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2021-11-23 02:51:44,034 INFO L87 Difference]: Start difference. First operand 15708 states and 23865 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:51:49,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:51,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:53,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:57,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:59,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:01,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:04,724 INFO L93 Difference]: Finished difference Result 41469 states and 63107 transitions. [2021-11-23 02:52:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:52:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 157 [2021-11-23 02:52:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:04,825 INFO L225 Difference]: With dead ends: 41469 [2021-11-23 02:52:04,825 INFO L226 Difference]: Without dead ends: 25975 [2021-11-23 02:52:04,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=36, Invalid=119, Unknown=1, NotChecked=0, Total=156 [2021-11-23 02:52:04,859 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 467 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 12 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 4828 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:04,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 4828 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 579 Invalid, 4 Unknown, 1 Unchecked, 19.1s Time] [2021-11-23 02:52:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25975 states. [2021-11-23 02:52:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25975 to 25372. [2021-11-23 02:52:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25372 states, 19227 states have (on average 1.4027149321266967) internal successors, (26970), 19711 states have internal predecessors, (26970), 5502 states have call successors, (5502), 552 states have call predecessors, (5502), 642 states have return successors, (6182), 5284 states have call predecessors, (6182), 5497 states have call successors, (6182) [2021-11-23 02:52:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25372 states to 25372 states and 38654 transitions. [2021-11-23 02:52:06,330 INFO L78 Accepts]: Start accepts. Automaton has 25372 states and 38654 transitions. Word has length 157 [2021-11-23 02:52:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:06,331 INFO L470 AbstractCegarLoop]: Abstraction has 25372 states and 38654 transitions. [2021-11-23 02:52:06,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:52:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 25372 states and 38654 transitions. [2021-11-23 02:52:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 02:52:06,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:06,338 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:06,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 02:52:06,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-23 02:52:06,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:52:06,742 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash 235453974, now seen corresponding path program 1 times [2021-11-23 02:52:06,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:52:06,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454313380] [2021-11-23 02:52:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:06,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:52:06,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:52:06,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:52:06,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 02:52:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:52:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:52:08,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:52:08,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:52:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454313380] [2021-11-23 02:52:08,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454313380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1309141440] [2021-11-23 02:52:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:08,459 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:52:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:52:08,460 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:52:08,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 02:52:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:52:09,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 02:52:09,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 02:52:09,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1309141440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:09,852 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:52:09,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4, 4] total 11 [2021-11-23 02:52:09,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159577407] [2021-11-23 02:52:09,852 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:09,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:52:09,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:52:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:52:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:52:09,853 INFO L87 Difference]: Start difference. First operand 25372 states and 38654 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-23 02:52:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:11,597 INFO L93 Difference]: Finished difference Result 61755 states and 94987 transitions. [2021-11-23 02:52:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:52:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 1 states have call successors, (19) Word has length 157 [2021-11-23 02:52:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:11,861 INFO L225 Difference]: With dead ends: 61755 [2021-11-23 02:52:11,861 INFO L226 Difference]: Without dead ends: 36597 [2021-11-23 02:52:11,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:52:11,894 INFO L933 BasicCegarLoop]: 1403 mSDtfsCounter, 390 mSDsluCounter, 6532 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 7935 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:11,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 7935 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:52:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36597 states. [2021-11-23 02:52:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36597 to 25420. [2021-11-23 02:52:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25420 states, 19275 states have (on average 1.4017120622568093) internal successors, (27018), 19735 states have internal predecessors, (27018), 5502 states have call successors, (5502), 552 states have call predecessors, (5502), 642 states have return successors, (6182), 5308 states have call predecessors, (6182), 5497 states have call successors, (6182) [2021-11-23 02:52:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25420 states to 25420 states and 38702 transitions. [2021-11-23 02:52:13,609 INFO L78 Accepts]: Start accepts. Automaton has 25420 states and 38702 transitions. Word has length 157 [2021-11-23 02:52:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 25420 states and 38702 transitions. [2021-11-23 02:52:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-23 02:52:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 25420 states and 38702 transitions. [2021-11-23 02:52:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 02:52:13,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:13,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-23 02:52:13,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-23 02:52:13,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-23 02:52:14,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:52:14,022 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash 24103061, now seen corresponding path program 2 times [2021-11-23 02:52:14,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:52:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389340876] [2021-11-23 02:52:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:52:14,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:52:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:52:14,025 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:52:14,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 02:52:15,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:52:15,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:52:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:52:15,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:52:15,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:52:16,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:52:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389340876] [2021-11-23 02:52:16,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389340876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1369226266] [2021-11-23 02:52:16,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:52:16,229 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:52:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:52:16,230 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:52:16,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 02:52:19,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:52:19,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:52:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:52:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:52:20,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:52:20,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1369226266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:20,743 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:52:20,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4, 4] total 6 [2021-11-23 02:52:20,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407852344] [2021-11-23 02:52:20,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:20,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:52:20,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:52:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:52:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:52:20,745 INFO L87 Difference]: Start difference. First operand 25420 states and 38702 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 4 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-23 02:52:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:24,971 INFO L93 Difference]: Finished difference Result 68870 states and 106173 transitions. [2021-11-23 02:52:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:52:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 4 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 157 [2021-11-23 02:52:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:25,086 INFO L225 Difference]: With dead ends: 68870 [2021-11-23 02:52:25,086 INFO L226 Difference]: Without dead ends: 43664 [2021-11-23 02:52:25,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:52:25,240 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 1316 mSDsluCounter, 2375 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:25,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 3625 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 02:52:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43664 states. [2021-11-23 02:52:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43664 to 43480. [2021-11-23 02:52:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43480 states, 33483 states have (on average 1.4071021115192783) internal successors, (47114), 33995 states have internal predecessors, (47114), 9354 states have call successors, (9354), 552 states have call predecessors, (9354), 642 states have return successors, (10467), 9108 states have call predecessors, (10467), 9349 states have call successors, (10467) [2021-11-23 02:52:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43480 states to 43480 states and 66935 transitions. [2021-11-23 02:52:28,359 INFO L78 Accepts]: Start accepts. Automaton has 43480 states and 66935 transitions. Word has length 157 [2021-11-23 02:52:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:28,359 INFO L470 AbstractCegarLoop]: Abstraction has 43480 states and 66935 transitions. [2021-11-23 02:52:28,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 4 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-23 02:52:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 43480 states and 66935 transitions. [2021-11-23 02:52:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 02:52:28,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:28,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:28,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:28,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:28,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:52:28,788 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2115047114, now seen corresponding path program 1 times [2021-11-23 02:52:28,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:52:28,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651473632] [2021-11-23 02:52:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:28,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:52:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:52:28,790 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:52:28,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 02:52:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:52:29,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:52:30,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 02:52:30,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:52:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651473632] [2021-11-23 02:52:30,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651473632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:30,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:30,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:52:30,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392783223] [2021-11-23 02:52:30,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:30,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:52:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:30,647 INFO L87 Difference]: Start difference. First operand 43480 states and 66935 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:52:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:32,903 INFO L93 Difference]: Finished difference Result 79765 states and 122526 transitions. [2021-11-23 02:52:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:52:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 163 [2021-11-23 02:52:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:33,000 INFO L225 Difference]: With dead ends: 79765 [2021-11-23 02:52:33,001 INFO L226 Difference]: Without dead ends: 36363 [2021-11-23 02:52:33,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:33,065 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 0 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3295 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:33,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3295 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:52:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36363 states. [2021-11-23 02:52:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36363 to 36357. [2021-11-23 02:52:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36357 states, 28052 states have (on average 1.4068159133038642) internal successors, (39464), 28533 states have internal predecessors, (39464), 7673 states have call successors, (7673), 543 states have call predecessors, (7673), 631 states have return successors, (8515), 7424 states have call predecessors, (8515), 7669 states have call successors, (8515) [2021-11-23 02:52:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36357 states to 36357 states and 55652 transitions. [2021-11-23 02:52:35,581 INFO L78 Accepts]: Start accepts. Automaton has 36357 states and 55652 transitions. Word has length 163 [2021-11-23 02:52:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:35,582 INFO L470 AbstractCegarLoop]: Abstraction has 36357 states and 55652 transitions. [2021-11-23 02:52:35,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:52:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 36357 states and 55652 transitions. [2021-11-23 02:52:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 02:52:35,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:35,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:35,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 02:52:35,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:52:35,802 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2053908319, now seen corresponding path program 1 times [2021-11-23 02:52:35,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:52:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765094606] [2021-11-23 02:52:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:35,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:52:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:52:35,805 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:52:35,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 02:52:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:36,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:52:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 02:52:37,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-23 02:52:37,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:52:37,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765094606] [2021-11-23 02:52:37,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765094606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:37,402 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:37,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:52:37,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345597310] [2021-11-23 02:52:37,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:37,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:52:37,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:52:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:52:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:52:37,404 INFO L87 Difference]: Start difference. First operand 36357 states and 55652 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:52:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:39,532 INFO L93 Difference]: Finished difference Result 70363 states and 107954 transitions. [2021-11-23 02:52:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:52:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 165 [2021-11-23 02:52:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:39,632 INFO L225 Difference]: With dead ends: 70363 [2021-11-23 02:52:39,632 INFO L226 Difference]: Without dead ends: 34214 [2021-11-23 02:52:39,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 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 02:52:39,697 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 10 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:39,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1642 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:52:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34214 states. [2021-11-23 02:52:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34214 to 34099. [2021-11-23 02:52:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34099 states, 26320 states have (on average 1.4104103343465046) internal successors, (37122), 26764 states have internal predecessors, (37122), 7228 states have call successors, (7228), 480 states have call predecessors, (7228), 550 states have return successors, (7944), 6978 states have call predecessors, (7944), 7220 states have call successors, (7944) [2021-11-23 02:52:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34099 states to 34099 states and 52294 transitions. [2021-11-23 02:52:41,862 INFO L78 Accepts]: Start accepts. Automaton has 34099 states and 52294 transitions. Word has length 165 [2021-11-23 02:52:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:41,862 INFO L470 AbstractCegarLoop]: Abstraction has 34099 states and 52294 transitions. [2021-11-23 02:52:41,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:52:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34099 states and 52294 transitions. [2021-11-23 02:52:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 02:52:41,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:41,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:41,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:42,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:52:42,065 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1959017318, now seen corresponding path program 1 times [2021-11-23 02:52:42,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:52:42,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076314635] [2021-11-23 02:52:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:42,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:52:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:52:42,068 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:52:42,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da248648-6896-4ffd-9352-0ab644db6258/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 02:52:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:52:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:52:43,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-23 02:52:44,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:52:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076314635] [2021-11-23 02:52:44,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076314635] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:52:44,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:52:44,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-11-23 02:52:44,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550277365] [2021-11-23 02:52:44,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:44,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:52:44,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:52:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:52:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:52:44,949 INFO L87 Difference]: Start difference. First operand 34099 states and 52294 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 7 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-23 02:52:48,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:51,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:55,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:57,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []