./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.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_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/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_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/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_09806b39-ede3-4d29-83ac-ef082447457c/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 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:01:49,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:01:49,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:01:49,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:01:49,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:01:49,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:01:49,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:01:49,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:01:49,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:01:49,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:01:49,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:01:49,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:01:49,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:01:49,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:01:49,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:01:49,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:01:49,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:01:49,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:01:49,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:01:49,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:01:49,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:01:49,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:01:49,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:01:49,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:01:49,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:01:49,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:01:49,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:01:49,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:01:49,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:01:49,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:01:49,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:01:49,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:01:49,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:01:49,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:01:49,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:01:49,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:01:49,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:01:49,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:01:49,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:01:49,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:01:49,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:01:49,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:01:49,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:01:49,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:01:49,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:01:49,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:01:49,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:01:49,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:01:49,275 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:01:49,275 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:01:49,275 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:01:49,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:01:49,276 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:01:49,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:01:49,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:01:49,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:01:49,277 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:01:49,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:01:49,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:01:49,278 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:01:49,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:01:49,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:01:49,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:01:49,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:01:49,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:01:49,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:01:49,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:01:49,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:01:49,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:01:49,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:01:49,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:01:49,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:01:49,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:01:49,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:01:49,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:01:49,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:01:49,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:01:49,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:01:49,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:01:49,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:01:49,283 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_09806b39-ede3-4d29-83ac-ef082447457c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d [2021-11-23 03:01:49,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:01:49,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:01:49,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:01:49,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:01:49,581 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:01:49,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2021-11-23 03:01:49,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/data/7ab20a974/e65fe732762c479b97e0e3cabf7c7132/FLAG3aafed5c6 [2021-11-23 03:01:50,630 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:01:50,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2021-11-23 03:01:50,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/data/7ab20a974/e65fe732762c479b97e0e3cabf7c7132/FLAG3aafed5c6 [2021-11-23 03:01:51,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/data/7ab20a974/e65fe732762c479b97e0e3cabf7c7132 [2021-11-23 03:01:51,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:01:51,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:01:51,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:01:51,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:01:51,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:01:51,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:01:51" (1/1) ... [2021-11-23 03:01:51,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c875d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:51, skipping insertion in model container [2021-11-23 03:01:51,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:01:51" (1/1) ... [2021-11-23 03:01:51,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:01:51,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:01:54,367 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_09806b39-ede3-4d29-83ac-ef082447457c/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2021-11-23 03:01:54,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:01:54,532 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:01:55,282 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_09806b39-ede3-4d29-83ac-ef082447457c/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2021-11-23 03:01:55,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:01:55,507 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:01:55,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55 WrapperNode [2021-11-23 03:01:55,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:01:55,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:01:55,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:01:55,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:01:55,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:55,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:55,971 INFO L137 Inliner]: procedures = 356, calls = 3806, calls flagged for inlining = 167, calls inlined = 133, statements flattened = 7285 [2021-11-23 03:01:55,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:01:55,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:01:55,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:01:55,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:01:55,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:55,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:01:56,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:01:56,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:01:56,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:01:56,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (1/1) ... [2021-11-23 03:01:56,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:01:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:01:56,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:01:56,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:01:56,455 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-11-23 03:01:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-11-23 03:01:56,455 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2021-11-23 03:01:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2021-11-23 03:01:56,455 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-23 03:01:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:01:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:01:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2021-11-23 03:01:56,456 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2021-11-23 03:01:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 03:01:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 03:01:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 03:01:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 03:01:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 03:01:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 03:01:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure set_signals [2021-11-23 03:01:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure set_signals [2021-11-23 03:01:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure irq_test [2021-11-23 03:01:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_test [2021-11-23 03:01:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_dma_bufs [2021-11-23 03:01:56,459 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_dma_bufs [2021-11-23 03:01:56,459 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_ioctl [2021-11-23 03:01:56,459 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_ioctl [2021-11-23 03:01:56,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:01:56,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:01:56,460 INFO L130 BoogieDeclarations]: Found specification of procedure flush_chars [2021-11-23 03:01:56,460 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_chars [2021-11-23 03:01:56,460 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2021-11-23 03:01:56,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2021-11-23 03:01:56,461 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:01:56,461 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:01:56,461 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:01:56,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:01:56,461 INFO L130 BoogieDeclarations]: Found specification of procedure tx_stop [2021-11-23 03:01:56,461 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_stop [2021-11-23 03:01:56,462 INFO L130 BoogieDeclarations]: Found specification of procedure sca_init [2021-11-23 03:01:56,462 INFO L138 BoogieDeclarations]: Found implementation of procedure sca_init [2021-11-23 03:01:56,462 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 03:01:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 03:01:56,463 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 03:01:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 03:01:56,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:01:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:01:56,464 INFO L130 BoogieDeclarations]: Found specification of procedure chars_in_buffer [2021-11-23 03:01:56,464 INFO L138 BoogieDeclarations]: Found implementation of procedure chars_in_buffer [2021-11-23 03:01:56,464 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 03:01:56,464 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 03:01:56,465 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-23 03:01:56,465 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-23 03:01:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure change_params [2021-11-23 03:01:56,466 INFO L138 BoogieDeclarations]: Found implementation of procedure change_params [2021-11-23 03:01:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-11-23 03:01:56,467 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-11-23 03:01:56,467 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:01:56,467 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:01:56,467 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2021-11-23 03:01:56,467 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2021-11-23 03:01:56,467 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:01:56,468 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:01:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure set_break [2021-11-23 03:01:56,469 INFO L138 BoogieDeclarations]: Found implementation of procedure set_break [2021-11-23 03:01:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure tx_start [2021-11-23 03:01:56,469 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_start [2021-11-23 03:01:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:01:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 03:01:56,470 INFO L130 BoogieDeclarations]: Found specification of procedure startup [2021-11-23 03:01:56,470 INFO L138 BoogieDeclarations]: Found implementation of procedure startup [2021-11-23 03:01:56,470 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_frame_bufs [2021-11-23 03:01:56,470 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_frame_bufs [2021-11-23 03:01:56,470 INFO L130 BoogieDeclarations]: Found specification of procedure rx_free_frame_buffers [2021-11-23 03:01:56,470 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_free_frame_buffers [2021-11-23 03:01:56,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:01:56,471 INFO L130 BoogieDeclarations]: Found specification of procedure wait_until_sent [2021-11-23 03:01:56,471 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_until_sent [2021-11-23 03:01:56,471 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 03:01:56,471 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 03:01:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:01:56,472 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:01:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure synclinkmp_cleanup [2021-11-23 03:01:56,472 INFO L138 BoogieDeclarations]: Found implementation of procedure synclinkmp_cleanup [2021-11-23 03:01:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_tty_port [2021-11-23 03:01:56,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_tty_port [2021-11-23 03:01:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:01:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure dtr_rts [2021-11-23 03:01:56,474 INFO L138 BoogieDeclarations]: Found implementation of procedure dtr_rts [2021-11-23 03:01:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 03:01:56,474 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 03:01:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:01:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure set_rate [2021-11-23 03:01:56,475 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rate [2021-11-23 03:01:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 03:01:56,476 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 03:01:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure ioctl [2021-11-23 03:01:56,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ioctl [2021-11-23 03:01:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-23 03:01:56,477 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-23 03:01:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:01:56,477 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:01:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmset [2021-11-23 03:01:56,478 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmset [2021-11-23 03:01:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:01:56,478 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:01:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2021-11-23 03:01:56,478 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2021-11-23 03:01:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 03:01:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 03:01:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure rx_stop [2021-11-23 03:01:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_stop [2021-11-23 03:01:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure loopback_test [2021-11-23 03:01:56,480 INFO L138 BoogieDeclarations]: Found implementation of procedure loopback_test [2021-11-23 03:01:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 03:01:56,481 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 03:01:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_tx_timeout [2021-11-23 03:01:56,484 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_tx_timeout [2021-11-23 03:01:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:01:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 03:01:56,485 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 03:01:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 03:01:56,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 03:01:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:01:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2021-11-23 03:01:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2021-11-23 03:01:56,494 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hung_up_p [2021-11-23 03:01:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hung_up_p [2021-11-23 03:01:56,494 INFO L130 BoogieDeclarations]: Found specification of procedure release_resources [2021-11-23 03:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resources [2021-11-23 03:01:56,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:01:56,495 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 03:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 03:01:56,495 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 03:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 03:01:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-23 03:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-23 03:01:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure tx_set_idle [2021-11-23 03:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_set_idle [2021-11-23 03:01:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure set_termios [2021-11-23 03:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure set_termios [2021-11-23 03:01:56,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:01:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure write_room [2021-11-23 03:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure write_room [2021-11-23 03:01:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure enable_loopback [2021-11-23 03:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_loopback [2021-11-23 03:01:56,497 INFO L130 BoogieDeclarations]: Found specification of procedure install [2021-11-23 03:01:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure install [2021-11-23 03:01:56,498 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_destroy [2021-11-23 03:01:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_destroy [2021-11-23 03:01:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 03:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 03:01:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure throttle [2021-11-23 03:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure throttle [2021-11-23 03:01:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-23 03:01:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-23 03:01:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:01:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:01:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_fifo [2021-11-23 03:01:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_fifo [2021-11-23 03:01:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_tty_port [2021-11-23 03:01:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_tty_port [2021-11-23 03:01:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:01:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 03:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 03:01:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_dma_buffer [2021-11-23 03:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_dma_buffer [2021-11-23 03:01:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure program_hw [2021-11-23 03:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure program_hw [2021-11-23 03:01:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure carrier_raised [2021-11-23 03:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure carrier_raised [2021-11-23 03:01:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:01:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure reset_port [2021-11-23 03:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_port [2021-11-23 03:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 03:01:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 03:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-11-23 03:01:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-11-23 03:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure register_test [2021-11-23 03:01:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure register_test [2021-11-23 03:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-11-23 03:01:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-11-23 03:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure hangup [2021-11-23 03:01:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure hangup [2021-11-23 03:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure get_icount [2021-11-23 03:01:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure get_icount [2021-11-23 03:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ops_disconnect_1 [2021-11-23 03:01:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ops_disconnect_1 [2021-11-23 03:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure write_control_reg [2021-11-23 03:01:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure write_control_reg [2021-11-23 03:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2021-11-23 03:01:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2021-11-23 03:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure unthrottle [2021-11-23 03:01:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure unthrottle [2021-11-23 03:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure tx_release [2021-11-23 03:01:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_release [2021-11-23 03:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 03:01:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 03:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 03:01:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 03:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_mode [2021-11-23 03:01:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_mode [2021-11-23 03:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure rx_get_frame [2021-11-23 03:01:56,508 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_get_frame [2021-11-23 03:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure shutdown [2021-11-23 03:01:56,508 INFO L138 BoogieDeclarations]: Found implementation of procedure shutdown [2021-11-23 03:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-23 03:01:56,508 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-23 03:01:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure send_xchar [2021-11-23 03:01:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure send_xchar [2021-11-23 03:01:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-23 03:01:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-23 03:01:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmget [2021-11-23 03:01:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmget [2021-11-23 03:01:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-23 03:01:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-23 03:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg16 [2021-11-23 03:01:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg16 [2021-11-23 03:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 03:01:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 03:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure get_signals [2021-11-23 03:01:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure get_signals [2021-11-23 03:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 03:01:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 03:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-23 03:01:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-23 03:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure rx_start [2021-11-23 03:01:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_start [2021-11-23 03:01:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure trace_block [2021-11-23 03:01:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_block [2021-11-23 03:01:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure sanity_check [2021-11-23 03:01:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure sanity_check [2021-11-23 03:01:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:01:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:01:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure read_status_reg [2021-11-23 03:01:56,514 INFO L138 BoogieDeclarations]: Found implementation of procedure read_status_reg [2021-11-23 03:01:57,537 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:01:57,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:02:29,143 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:02:32,164 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:02:32,165 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:02:32,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:32 BoogieIcfgContainer [2021-11-23 03:02:32,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:02:32,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:02:32,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:02:32,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:02:32,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:01:51" (1/3) ... [2021-11-23 03:02:32,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3660e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:32, skipping insertion in model container [2021-11-23 03:02:32,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:55" (2/3) ... [2021-11-23 03:02:32,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3660e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:32, skipping insertion in model container [2021-11-23 03:02:32,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:32" (3/3) ... [2021-11-23 03:02:32,184 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2021-11-23 03:02:32,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:02:32,190 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:02:32,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:02:32,277 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 03:02:32,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:02:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 2056 states, 1234 states have (on average 1.3695299837925445) internal successors, (1690), 1291 states have internal predecessors, (1690), 710 states have call successors, (710), 110 states have call predecessors, (710), 110 states have return successors, (710), 704 states have call predecessors, (710), 710 states have call successors, (710) [2021-11-23 03:02:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:02:32,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:32,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:02:32,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash -926026724, now seen corresponding path program 1 times [2021-11-23 03:02:32,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:32,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596127018] [2021-11-23 03:02:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:32,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:02:33,049 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 03:02:33,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:02:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596127018] [2021-11-23 03:02:33,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596127018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:02:33,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:02:33,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:02:33,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237826980] [2021-11-23 03:02:33,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:02:33,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:02:33,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:02:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:02:33,100 INFO L87 Difference]: Start difference. First operand has 2056 states, 1234 states have (on average 1.3695299837925445) internal successors, (1690), 1291 states have internal predecessors, (1690), 710 states have call successors, (710), 110 states have call predecessors, (710), 110 states have return successors, (710), 704 states have call predecessors, (710), 710 states have call successors, (710) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:35,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:02:37,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:02:39,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:02:40,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:02:43,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:02:47,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:02:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:02:48,604 INFO L93 Difference]: Finished difference Result 6149 states and 9346 transitions. [2021-11-23 03:02:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:02:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 03:02:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:02:48,686 INFO L225 Difference]: With dead ends: 6149 [2021-11-23 03:02:48,687 INFO L226 Difference]: Without dead ends: 4092 [2021-11-23 03:02:48,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 03:02:48,718 INFO L933 BasicCegarLoop]: 3730 mSDtfsCounter, 3075 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 6489 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:02:48,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 6489 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 703 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2021-11-23 03:02:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-11-23 03:02:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 4088. [2021-11-23 03:02:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 2458 states have (on average 1.3677786818551667) internal successors, (3362), 2562 states have internal predecessors, (3362), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2021-11-23 03:02:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 6181 transitions. [2021-11-23 03:02:49,200 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 6181 transitions. Word has length 16 [2021-11-23 03:02:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:02:49,201 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 6181 transitions. [2021-11-23 03:02:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 6181 transitions. [2021-11-23 03:02:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:02:49,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:49,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:02:49,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:02:49,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1356726083, now seen corresponding path program 1 times [2021-11-23 03:02:49,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:49,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768776198] [2021-11-23 03:02:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:49,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:02:49,603 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 03:02:49,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:02:49,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768776198] [2021-11-23 03:02:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768776198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:02:49,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:02:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:02:49,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375242892] [2021-11-23 03:02:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:02:49,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:02:49,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:02:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:02:49,607 INFO L87 Difference]: Start difference. First operand 4088 states and 6181 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:51,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:02:53,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:02:58,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:00,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:03,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:04,072 INFO L93 Difference]: Finished difference Result 4096 states and 6188 transitions. [2021-11-23 03:03:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:03:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:03:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:04,111 INFO L225 Difference]: With dead ends: 4096 [2021-11-23 03:03:04,111 INFO L226 Difference]: Without dead ends: 4093 [2021-11-23 03:03:04,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 03:03:04,117 INFO L933 BasicCegarLoop]: 3730 mSDtfsCounter, 3070 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 6492 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:04,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3073 Valid, 6492 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 703 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2021-11-23 03:03:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-11-23 03:03:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 4089. [2021-11-23 03:03:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 2459 states have (on average 1.3676291175274502) internal successors, (3363), 2563 states have internal predecessors, (3363), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2021-11-23 03:03:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 6182 transitions. [2021-11-23 03:03:04,385 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 6182 transitions. Word has length 17 [2021-11-23 03:03:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:04,386 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 6182 transitions. [2021-11-23 03:03:04,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 6182 transitions. [2021-11-23 03:03:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:03:04,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:04,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:04,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:03:04,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -892376065, now seen corresponding path program 1 times [2021-11-23 03:03:04,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094203908] [2021-11-23 03:03:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:04,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:04,562 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 03:03:04,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094203908] [2021-11-23 03:03:04,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094203908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:04,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:04,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:03:04,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406802317] [2021-11-23 03:03:04,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:04,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:03:04,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:03:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:03:04,566 INFO L87 Difference]: Start difference. First operand 4089 states and 6182 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:06,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:08,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:03:11,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:16,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:18,035 INFO L93 Difference]: Finished difference Result 4097 states and 6189 transitions. [2021-11-23 03:03:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:03:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 03:03:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:18,072 INFO L225 Difference]: With dead ends: 4097 [2021-11-23 03:03:18,073 INFO L226 Difference]: Without dead ends: 4094 [2021-11-23 03:03:18,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 03:03:18,079 INFO L933 BasicCegarLoop]: 3729 mSDtfsCounter, 3067 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3070 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:18,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3070 Valid, 6494 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 702 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 03:03:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-11-23 03:03:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 4090. [2021-11-23 03:03:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 2460 states have (on average 1.367479674796748) internal successors, (3364), 2564 states have internal predecessors, (3364), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2021-11-23 03:03:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 6183 transitions. [2021-11-23 03:03:18,321 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 6183 transitions. Word has length 18 [2021-11-23 03:03:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:18,322 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 6183 transitions. [2021-11-23 03:03:18,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 6183 transitions. [2021-11-23 03:03:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:03:18,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:18,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:03:18,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:03:18,326 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1895061050, now seen corresponding path program 1 times [2021-11-23 03:03:18,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912759821] [2021-11-23 03:03:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:18,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:18,495 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 03:03:18,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912759821] [2021-11-23 03:03:18,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912759821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:18,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:18,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:03:18,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693261846] [2021-11-23 03:03:18,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:03:18,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:03:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:03:18,499 INFO L87 Difference]: Start difference. First operand 4090 states and 6183 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:20,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:22,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:03:25,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:31,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:32,451 INFO L93 Difference]: Finished difference Result 6245 states and 9401 transitions. [2021-11-23 03:03:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:03:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 03:03:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:32,499 INFO L225 Difference]: With dead ends: 6245 [2021-11-23 03:03:32,499 INFO L226 Difference]: Without dead ends: 6234 [2021-11-23 03:03:32,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 03:03:32,506 INFO L933 BasicCegarLoop]: 3653 mSDtfsCounter, 2997 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 6400 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:32,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2999 Valid, 6400 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 683 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2021-11-23 03:03:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-11-23 03:03:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 6229. [2021-11-23 03:03:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6229 states, 3746 states have (on average 1.3646556326748531) internal successors, (5112), 3905 states have internal predecessors, (5112), 2130 states have call successors, (2130), 354 states have call predecessors, (2130), 352 states have return successors, (2139), 2101 states have call predecessors, (2139), 2124 states have call successors, (2139) [2021-11-23 03:03:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6229 states to 6229 states and 9381 transitions. [2021-11-23 03:03:32,915 INFO L78 Accepts]: Start accepts. Automaton has 6229 states and 9381 transitions. Word has length 19 [2021-11-23 03:03:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:32,915 INFO L470 AbstractCegarLoop]: Abstraction has 6229 states and 9381 transitions. [2021-11-23 03:03:32,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:03:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 6229 states and 9381 transitions. [2021-11-23 03:03:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:03:32,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:32,921 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] [2021-11-23 03:03:32,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:03:32,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:32,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:32,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1444519304, now seen corresponding path program 1 times [2021-11-23 03:03:32,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:32,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121318372] [2021-11-23 03:03:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:32,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:33,165 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 03:03:33,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121318372] [2021-11-23 03:03:33,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121318372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:33,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:33,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:03:33,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922028142] [2021-11-23 03:03:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:33,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:03:33,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:03:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:03:33,169 INFO L87 Difference]: Start difference. First operand 6229 states and 9381 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:03:35,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:37,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:03:43,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:47,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:52,286 INFO L93 Difference]: Finished difference Result 11664 states and 17821 transitions. [2021-11-23 03:03:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:03:52,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-23 03:03:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:52,379 INFO L225 Difference]: With dead ends: 11664 [2021-11-23 03:03:52,379 INFO L226 Difference]: Without dead ends: 11653 [2021-11-23 03:03:52,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:03:52,386 INFO L933 BasicCegarLoop]: 4691 mSDtfsCounter, 4044 mSDsluCounter, 7539 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 232 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4047 SdHoareTripleChecker+Valid, 11517 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:52,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4047 Valid, 11517 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1419 Invalid, 4 Unknown, 0 Unchecked, 18.7s Time] [2021-11-23 03:03:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11653 states. [2021-11-23 03:03:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11653 to 10221. [2021-11-23 03:03:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10221 states, 6154 states have (on average 1.367078323041924) internal successors, (8413), 6418 states have internal predecessors, (8413), 3500 states have call successors, (3500), 569 states have call predecessors, (3500), 566 states have return successors, (3524), 3450 states have call predecessors, (3524), 3494 states have call successors, (3524) [2021-11-23 03:03:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10221 states to 10221 states and 15437 transitions. [2021-11-23 03:03:53,183 INFO L78 Accepts]: Start accepts. Automaton has 10221 states and 15437 transitions. Word has length 26 [2021-11-23 03:03:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:53,184 INFO L470 AbstractCegarLoop]: Abstraction has 10221 states and 15437 transitions. [2021-11-23 03:03:53,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:03:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10221 states and 15437 transitions. [2021-11-23 03:03:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 03:03:53,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:53,194 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 03:03:53,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:03:53,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1367215745, now seen corresponding path program 1 times [2021-11-23 03:03:53,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:53,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025512703] [2021-11-23 03:03:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:53,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:53,520 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 03:03:53,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:53,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025512703] [2021-11-23 03:03:53,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025512703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:53,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:53,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:03:53,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130856662] [2021-11-23 03:03:53,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:53,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:03:53,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:03:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:03:53,523 INFO L87 Difference]: Start difference. First operand 10221 states and 15437 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:03:55,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:03:57,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:04:02,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:04,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:07,452 INFO L93 Difference]: Finished difference Result 14358 states and 21679 transitions. [2021-11-23 03:04:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:04:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-11-23 03:04:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:07,536 INFO L225 Difference]: With dead ends: 14358 [2021-11-23 03:04:07,537 INFO L226 Difference]: Without dead ends: 14355 [2021-11-23 03:04:07,549 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 03:04:07,550 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3069 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 6580 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:07,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 6580 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 3 Unknown, 0 Unchecked, 13.6s Time] [2021-11-23 03:04:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-11-23 03:04:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 14351. [2021-11-23 03:04:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14351 states, 8644 states have (on average 1.3666126793151319) internal successors, (11813), 9015 states have internal predecessors, (11813), 4910 states have call successors, (4910), 800 states have call predecessors, (4910), 796 states have return successors, (4949), 4842 states have call predecessors, (4949), 4904 states have call successors, (4949) [2021-11-23 03:04:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14351 states to 14351 states and 21672 transitions. [2021-11-23 03:04:08,566 INFO L78 Accepts]: Start accepts. Automaton has 14351 states and 21672 transitions. Word has length 38 [2021-11-23 03:04:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 14351 states and 21672 transitions. [2021-11-23 03:04:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 14351 states and 21672 transitions. [2021-11-23 03:04:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:04:08,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:08,578 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] [2021-11-23 03:04:08,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:04:08,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:04:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 564768320, now seen corresponding path program 1 times [2021-11-23 03:04:08,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:08,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530486916] [2021-11-23 03:04:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:08,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:08,819 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 03:04:08,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530486916] [2021-11-23 03:04:08,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530486916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:08,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:04:08,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:04:08,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027482699] [2021-11-23 03:04:08,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:08,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:04:08,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:04:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:04:08,822 INFO L87 Difference]: Start difference. First operand 14351 states and 21672 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:11,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:13,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:04:18,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:22,037 INFO L93 Difference]: Finished difference Result 14360 states and 21681 transitions. [2021-11-23 03:04:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:04:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-11-23 03:04:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:22,123 INFO L225 Difference]: With dead ends: 14360 [2021-11-23 03:04:22,123 INFO L226 Difference]: Without dead ends: 14357 [2021-11-23 03:04:22,135 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 03:04:22,136 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3066 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3069 SdHoareTripleChecker+Valid, 6583 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:22,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3069 Valid, 6583 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 03:04:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14357 states. [2021-11-23 03:04:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14357 to 14353. [2021-11-23 03:04:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 8646 states have (on average 1.366527874161462) internal successors, (11815), 9017 states have internal predecessors, (11815), 4910 states have call successors, (4910), 800 states have call predecessors, (4910), 796 states have return successors, (4949), 4842 states have call predecessors, (4949), 4904 states have call successors, (4949) [2021-11-23 03:04:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 21674 transitions. [2021-11-23 03:04:23,065 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 21674 transitions. Word has length 39 [2021-11-23 03:04:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 14353 states and 21674 transitions. [2021-11-23 03:04:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 21674 transitions. [2021-11-23 03:04:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 03:04:23,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:23,075 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] [2021-11-23 03:04:23,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:04:23,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:04:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 326737058, now seen corresponding path program 1 times [2021-11-23 03:04:23,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:23,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058197526] [2021-11-23 03:04:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:23,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:23,299 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 03:04:23,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:23,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058197526] [2021-11-23 03:04:23,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058197526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:23,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:04:23,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:04:23,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684653541] [2021-11-23 03:04:23,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:23,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:04:23,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:04:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:04:23,302 INFO L87 Difference]: Start difference. First operand 14353 states and 21674 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:25,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:27,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:04:31,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:35,883 INFO L93 Difference]: Finished difference Result 14362 states and 21682 transitions. [2021-11-23 03:04:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:04:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-23 03:04:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:35,961 INFO L225 Difference]: With dead ends: 14362 [2021-11-23 03:04:35,962 INFO L226 Difference]: Without dead ends: 14353 [2021-11-23 03:04:35,974 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 03:04:35,975 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3063 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 6586 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:35,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 6586 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-23 03:04:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14353 states. [2021-11-23 03:04:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14353 to 14349. [2021-11-23 03:04:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14349 states, 8643 states have (on average 1.3664236954761078) internal successors, (11810), 9014 states have internal predecessors, (11810), 4909 states have call successors, (4909), 800 states have call predecessors, (4909), 796 states have return successors, (4948), 4841 states have call predecessors, (4948), 4903 states have call successors, (4948) [2021-11-23 03:04:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14349 states to 14349 states and 21667 transitions. [2021-11-23 03:04:36,902 INFO L78 Accepts]: Start accepts. Automaton has 14349 states and 21667 transitions. Word has length 40 [2021-11-23 03:04:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:36,902 INFO L470 AbstractCegarLoop]: Abstraction has 14349 states and 21667 transitions. [2021-11-23 03:04:36,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 14349 states and 21667 transitions. [2021-11-23 03:04:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 03:04:36,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:36,913 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] [2021-11-23 03:04:36,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:04:36,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:04:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1537707395, now seen corresponding path program 1 times [2021-11-23 03:04:36,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:36,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680348577] [2021-11-23 03:04:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:36,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:37,119 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 03:04:37,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680348577] [2021-11-23 03:04:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680348577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:37,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:04:37,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:04:37,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967804024] [2021-11-23 03:04:37,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:37,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:04:37,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:04:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:04:37,123 INFO L87 Difference]: Start difference. First operand 14349 states and 21667 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:39,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:41,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:04:42,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:46,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:49,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:51,284 INFO L93 Difference]: Finished difference Result 16632 states and 25052 transitions. [2021-11-23 03:04:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:04:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-11-23 03:04:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:51,392 INFO L225 Difference]: With dead ends: 16632 [2021-11-23 03:04:51,392 INFO L226 Difference]: Without dead ends: 16621 [2021-11-23 03:04:51,407 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 03:04:51,407 INFO L933 BasicCegarLoop]: 3839 mSDtfsCounter, 2993 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 6586 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:51,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2995 Valid, 6586 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 720 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 03:04:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16621 states. [2021-11-23 03:04:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16621 to 16595. [2021-11-23 03:04:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16595 states, 9990 states have (on average 1.3645645645645645) internal successors, (13632), 10415 states have internal predecessors, (13632), 5658 states have call successors, (5658), 949 states have call predecessors, (5658), 946 states have return successors, (5709), 5587 states have call predecessors, (5709), 5652 states have call successors, (5709) [2021-11-23 03:04:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16595 states to 16595 states and 24999 transitions. [2021-11-23 03:04:52,516 INFO L78 Accepts]: Start accepts. Automaton has 16595 states and 24999 transitions. Word has length 41 [2021-11-23 03:04:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:52,516 INFO L470 AbstractCegarLoop]: Abstraction has 16595 states and 24999 transitions. [2021-11-23 03:04:52,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:04:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 16595 states and 24999 transitions. [2021-11-23 03:04:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 03:04:52,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:52,532 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] [2021-11-23 03:04:52,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:04:52,533 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:04:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2002854472, now seen corresponding path program 1 times [2021-11-23 03:04:52,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:52,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841837531] [2021-11-23 03:04:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:52,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:52,674 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 03:04:52,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:52,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841837531] [2021-11-23 03:04:52,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841837531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:52,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:04:52,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:04:52,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893060471] [2021-11-23 03:04:52,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:04:52,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:04:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:04:52,678 INFO L87 Difference]: Start difference. First operand 16595 states and 24999 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:04:54,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:04:57,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:05:02,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:04,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:06,241 INFO L93 Difference]: Finished difference Result 41709 states and 62462 transitions. [2021-11-23 03:05:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:05:06,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-11-23 03:05:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:06,360 INFO L225 Difference]: With dead ends: 41709 [2021-11-23 03:05:06,361 INFO L226 Difference]: Without dead ends: 25115 [2021-11-23 03:05:06,476 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 03:05:06,477 INFO L933 BasicCegarLoop]: 3585 mSDtfsCounter, 1563 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 6077 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:06,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 6077 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1007 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 03:05:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-11-23 03:05:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 22958. [2021-11-23 03:05:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 13692 states have (on average 1.3529798422436459) internal successors, (18525), 14252 states have internal predecessors, (18525), 7863 states have call successors, (7863), 1405 states have call predecessors, (7863), 1402 states have return successors, (7920), 7765 states have call predecessors, (7920), 7857 states have call successors, (7920) [2021-11-23 03:05:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 34308 transitions. [2021-11-23 03:05:08,104 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 34308 transitions. Word has length 51 [2021-11-23 03:05:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:08,104 INFO L470 AbstractCegarLoop]: Abstraction has 22958 states and 34308 transitions. [2021-11-23 03:05:08,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:05:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 34308 transitions. [2021-11-23 03:05:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 03:05:08,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:08,129 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, 1, 1] [2021-11-23 03:05:08,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:05:08,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:08,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash 603038115, now seen corresponding path program 1 times [2021-11-23 03:05:08,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:05:08,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616101616] [2021-11-23 03:05:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:08,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:05:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:05:08,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:05:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616101616] [2021-11-23 03:05:08,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616101616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:05:08,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:05:08,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:05:08,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841071502] [2021-11-23 03:05:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:08,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:05:08,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:05:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:05:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:05:08,302 INFO L87 Difference]: Start difference. First operand 22958 states and 34308 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:05:10,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:12,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:05:21,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:23,827 INFO L93 Difference]: Finished difference Result 59661 states and 89296 transitions. [2021-11-23 03:05:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:05:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-23 03:05:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:23,982 INFO L225 Difference]: With dead ends: 59661 [2021-11-23 03:05:23,982 INFO L226 Difference]: Without dead ends: 36704 [2021-11-23 03:05:24,060 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 03:05:24,060 INFO L933 BasicCegarLoop]: 4236 mSDtfsCounter, 2523 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 127 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2526 SdHoareTripleChecker+Valid, 6694 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2526 Valid, 6694 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1198 Invalid, 3 Unknown, 0 Unchecked, 14.5s Time] [2021-11-23 03:05:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36704 states. [2021-11-23 03:05:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36704 to 36667. [2021-11-23 03:05:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36667 states, 22056 states have (on average 1.3360536815379036) internal successors, (29468), 22981 states have internal predecessors, (29468), 12324 states have call successors, (12324), 2291 states have call predecessors, (12324), 2286 states have return successors, (12401), 12157 states have call predecessors, (12401), 12318 states have call successors, (12401) [2021-11-23 03:05:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36667 states to 36667 states and 54193 transitions. [2021-11-23 03:05:26,153 INFO L78 Accepts]: Start accepts. Automaton has 36667 states and 54193 transitions. Word has length 62 [2021-11-23 03:05:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:26,153 INFO L470 AbstractCegarLoop]: Abstraction has 36667 states and 54193 transitions. [2021-11-23 03:05:26,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:05:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36667 states and 54193 transitions. [2021-11-23 03:05:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 03:05:26,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:26,169 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, 1] [2021-11-23 03:05:26,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:05:26,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2012085978, now seen corresponding path program 1 times [2021-11-23 03:05:26,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:05:26,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727092414] [2021-11-23 03:05:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:26,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:05:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:05:26,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:05:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727092414] [2021-11-23 03:05:26,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727092414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:05:26,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:05:26,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:05:26,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620356793] [2021-11-23 03:05:26,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:05:26,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:05:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:05:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:05:26,380 INFO L87 Difference]: Start difference. First operand 36667 states and 54193 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 03:05:28,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:31,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:05:33,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:35,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:38,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:47,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:50,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:05:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:53,875 INFO L93 Difference]: Finished difference Result 72828 states and 107585 transitions. [2021-11-23 03:05:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:05:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2021-11-23 03:05:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:54,221 INFO L225 Difference]: With dead ends: 72828 [2021-11-23 03:05:54,221 INFO L226 Difference]: Without dead ends: 36162 [2021-11-23 03:05:54,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:05:54,354 INFO L933 BasicCegarLoop]: 3684 mSDtfsCounter, 2641 mSDsluCounter, 15284 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 60 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2648 SdHoareTripleChecker+Valid, 17508 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:54,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2648 Valid, 17508 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1919 Invalid, 4 Unknown, 0 Unchecked, 25.8s Time] [2021-11-23 03:05:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36162 states. [2021-11-23 03:05:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36162 to 36159. [2021-11-23 03:05:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36159 states, 21765 states have (on average 1.3347576384102917) internal successors, (29051), 22672 states have internal predecessors, (29051), 12118 states have call successors, (12118), 2280 states have call predecessors, (12118), 2275 states have return successors, (12193), 11957 states have call predecessors, (12193), 12112 states have call successors, (12193) [2021-11-23 03:05:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36159 states to 36159 states and 53362 transitions. [2021-11-23 03:05:56,260 INFO L78 Accepts]: Start accepts. Automaton has 36159 states and 53362 transitions. Word has length 61 [2021-11-23 03:05:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:56,261 INFO L470 AbstractCegarLoop]: Abstraction has 36159 states and 53362 transitions. [2021-11-23 03:05:56,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 03:05:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 36159 states and 53362 transitions. [2021-11-23 03:05:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 03:05:56,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:56,279 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:05:56,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:05:56,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 502508152, now seen corresponding path program 1 times [2021-11-23 03:05:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:05:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140893017] [2021-11-23 03:05:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:05:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:05:56,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:05:56,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140893017] [2021-11-23 03:05:56,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140893017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:05:56,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:05:56,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:05:56,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331609223] [2021-11-23 03:05:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:56,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:05:56,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:05:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:05:56,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:05:56,674 INFO L87 Difference]: Start difference. First operand 36159 states and 53362 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:05:58,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:01,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:06:03,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:08,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:10,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:11,642 INFO L93 Difference]: Finished difference Result 36765 states and 54100 transitions. [2021-11-23 03:06:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:06:11,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2021-11-23 03:06:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:11,830 INFO L225 Difference]: With dead ends: 36765 [2021-11-23 03:06:11,830 INFO L226 Difference]: Without dead ends: 36762 [2021-11-23 03:06:11,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:06:11,852 INFO L933 BasicCegarLoop]: 2904 mSDtfsCounter, 279 mSDsluCounter, 3012 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 5595 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:11,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 5595 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 684 Invalid, 4 Unknown, 0 Unchecked, 14.3s Time] [2021-11-23 03:06:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36762 states. [2021-11-23 03:06:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36762 to 36762. [2021-11-23 03:06:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36762 states, 22085 states have (on average 1.3318994792845822) internal successors, (29415), 23003 states have internal predecessors, (29415), 12299 states have call successors, (12299), 2382 states have call predecessors, (12299), 2377 states have return successors, (12376), 12139 states have call predecessors, (12376), 12294 states have call successors, (12376) [2021-11-23 03:06:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36762 states to 36762 states and 54090 transitions. [2021-11-23 03:06:13,849 INFO L78 Accepts]: Start accepts. Automaton has 36762 states and 54090 transitions. Word has length 71 [2021-11-23 03:06:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 36762 states and 54090 transitions. [2021-11-23 03:06:13,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:06:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36762 states and 54090 transitions. [2021-11-23 03:06:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 03:06:13,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:13,896 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:06:13,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:06:13,897 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1333058455, now seen corresponding path program 1 times [2021-11-23 03:06:13,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:13,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235330006] [2021-11-23 03:06:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:13,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:06:14,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:14,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235330006] [2021-11-23 03:06:14,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235330006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:06:14,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:06:14,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:06:14,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786973887] [2021-11-23 03:06:14,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:06:14,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:06:14,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:06:14,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:06:14,071 INFO L87 Difference]: Start difference. First operand 36762 states and 54090 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:06:16,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:18,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:06:20,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:23,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:30,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:32,169 INFO L93 Difference]: Finished difference Result 101604 states and 149034 transitions. [2021-11-23 03:06:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:06:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2021-11-23 03:06:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:32,575 INFO L225 Difference]: With dead ends: 101604 [2021-11-23 03:06:32,575 INFO L226 Difference]: Without dead ends: 64843 [2021-11-23 03:06:32,693 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 03:06:32,693 INFO L933 BasicCegarLoop]: 4754 mSDtfsCounter, 2524 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 7518 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:32,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2527 Valid, 7518 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 832 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2021-11-23 03:06:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64843 states. [2021-11-23 03:06:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64843 to 64807. [2021-11-23 03:06:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64807 states, 38774 states have (on average 1.3270490534894517) internal successors, (51455), 40529 states have internal predecessors, (51455), 21632 states have call successors, (21632), 4409 states have call predecessors, (21632), 4400 states have return successors, (21793), 21311 states have call predecessors, (21793), 21627 states have call successors, (21793) [2021-11-23 03:06:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64807 states to 64807 states and 94880 transitions. [2021-11-23 03:06:35,729 INFO L78 Accepts]: Start accepts. Automaton has 64807 states and 94880 transitions. Word has length 96 [2021-11-23 03:06:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:35,730 INFO L470 AbstractCegarLoop]: Abstraction has 64807 states and 94880 transitions. [2021-11-23 03:06:35,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:06:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 64807 states and 94880 transitions. [2021-11-23 03:06:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 03:06:35,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:35,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:35,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:06:35,813 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1790729454, now seen corresponding path program 1 times [2021-11-23 03:06:35,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200088729] [2021-11-23 03:06:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:35,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 03:06:36,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:36,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200088729] [2021-11-23 03:06:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200088729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:06:36,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:06:36,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:06:36,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676603308] [2021-11-23 03:06:36,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:06:36,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:06:36,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:06:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:06:36,427 INFO L87 Difference]: Start difference. First operand 64807 states and 94880 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:06:38,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:40,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:06:42,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:44,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:50,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:06:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:53,012 INFO L93 Difference]: Finished difference Result 130625 states and 191343 transitions. [2021-11-23 03:06:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:06:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 107 [2021-11-23 03:06:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:53,298 INFO L225 Difference]: With dead ends: 130625 [2021-11-23 03:06:53,299 INFO L226 Difference]: Without dead ends: 65819 [2021-11-23 03:06:53,653 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 03:06:53,655 INFO L933 BasicCegarLoop]: 2777 mSDtfsCounter, 35 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5533 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:53,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 5533 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 673 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 03:06:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65819 states. [2021-11-23 03:06:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65819 to 64851. [2021-11-23 03:06:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64851 states, 38818 states have (on average 1.3266783450976352) internal successors, (51499), 40573 states have internal predecessors, (51499), 21632 states have call successors, (21632), 4409 states have call predecessors, (21632), 4400 states have return successors, (21793), 21311 states have call predecessors, (21793), 21627 states have call successors, (21793) [2021-11-23 03:06:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64851 states to 64851 states and 94924 transitions. [2021-11-23 03:06:57,170 INFO L78 Accepts]: Start accepts. Automaton has 64851 states and 94924 transitions. Word has length 107 [2021-11-23 03:06:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:57,170 INFO L470 AbstractCegarLoop]: Abstraction has 64851 states and 94924 transitions. [2021-11-23 03:06:57,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:06:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 64851 states and 94924 transitions. [2021-11-23 03:06:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 03:06:57,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:57,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:06:57,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:06:57,259 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1442527448, now seen corresponding path program 1 times [2021-11-23 03:06:57,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:06:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977272687] [2021-11-23 03:06:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:57,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:06:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:06:57,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:06:57,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977272687] [2021-11-23 03:06:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977272687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:06:57,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537720092] [2021-11-23 03:06:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:57,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:06:57,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:06:57,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:06:57,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:06:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 3564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:06:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 03:07:00,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:07:00,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537720092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:00,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:07:00,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:07:00,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328859273] [2021-11-23 03:07:00,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:00,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:07:00,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:07:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:00,015 INFO L87 Difference]: Start difference. First operand 64851 states and 94924 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:07:02,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:04,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:07:06,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:07,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:10,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:14,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:17,355 INFO L93 Difference]: Finished difference Result 96009 states and 140689 transitions. [2021-11-23 03:07:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:07:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 144 [2021-11-23 03:07:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:17,723 INFO L225 Difference]: With dead ends: 96009 [2021-11-23 03:07:17,723 INFO L226 Difference]: Without dead ends: 96006 [2021-11-23 03:07:17,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:17,765 INFO L933 BasicCegarLoop]: 3967 mSDtfsCounter, 2974 mSDsluCounter, 3085 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 6724 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:17,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2977 Valid, 6724 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 733 Invalid, 4 Unknown, 0 Unchecked, 15.3s Time] [2021-11-23 03:07:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96006 states. [2021-11-23 03:07:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96006 to 89783. [2021-11-23 03:07:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89783 states, 53755 states have (on average 1.3277834620035345) internal successors, (71375), 56187 states have internal predecessors, (71375), 29988 states have call successors, (29988), 6054 states have call predecessors, (29988), 6039 states have return successors, (30213), 29528 states have call predecessors, (30213), 29983 states have call successors, (30213) [2021-11-23 03:07:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89783 states to 89783 states and 131576 transitions. [2021-11-23 03:07:22,653 INFO L78 Accepts]: Start accepts. Automaton has 89783 states and 131576 transitions. Word has length 144 [2021-11-23 03:07:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:22,653 INFO L470 AbstractCegarLoop]: Abstraction has 89783 states and 131576 transitions. [2021-11-23 03:07:22,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:07:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 89783 states and 131576 transitions. [2021-11-23 03:07:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 03:07:22,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:22,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:22,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:22,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:22,912 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1767461383, now seen corresponding path program 1 times [2021-11-23 03:07:22,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:22,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26656192] [2021-11-23 03:07:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:22,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:07:23,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:23,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26656192] [2021-11-23 03:07:23,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26656192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:07:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220739173] [2021-11-23 03:07:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:23,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:23,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:23,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:23,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:07:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 3566 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:07:24,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 03:07:25,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:07:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220739173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:25,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:07:25,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:07:25,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526724681] [2021-11-23 03:07:25,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:25,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:07:25,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:07:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:25,489 INFO L87 Difference]: Start difference. First operand 89783 states and 131576 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:07:27,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:29,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:07:33,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:38,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:41,509 INFO L93 Difference]: Finished difference Result 89791 states and 131584 transitions. [2021-11-23 03:07:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:07:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 145 [2021-11-23 03:07:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:41,868 INFO L225 Difference]: With dead ends: 89791 [2021-11-23 03:07:41,868 INFO L226 Difference]: Without dead ends: 89788 [2021-11-23 03:07:41,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:41,903 INFO L933 BasicCegarLoop]: 3946 mSDtfsCounter, 2971 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2974 SdHoareTripleChecker+Valid, 6706 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:41,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2974 Valid, 6706 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 03:07:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89788 states. [2021-11-23 03:07:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89788 to 89785. [2021-11-23 03:07:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89785 states, 53757 states have (on average 1.3277712669977864) internal successors, (71377), 56189 states have internal predecessors, (71377), 29988 states have call successors, (29988), 6054 states have call predecessors, (29988), 6039 states have return successors, (30213), 29528 states have call predecessors, (30213), 29983 states have call successors, (30213) [2021-11-23 03:07:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89785 states to 89785 states and 131578 transitions. [2021-11-23 03:07:46,426 INFO L78 Accepts]: Start accepts. Automaton has 89785 states and 131578 transitions. Word has length 145 [2021-11-23 03:07:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:46,427 INFO L470 AbstractCegarLoop]: Abstraction has 89785 states and 131578 transitions. [2021-11-23 03:07:46,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:07:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 89785 states and 131578 transitions. [2021-11-23 03:07:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 03:07:46,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:46,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:46,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:07:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:07:47,048 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1044483653, now seen corresponding path program 1 times [2021-11-23 03:07:47,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902003282] [2021-11-23 03:07:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:47,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:07:47,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:47,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902003282] [2021-11-23 03:07:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902003282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:07:47,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390380333] [2021-11-23 03:07:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:47,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:47,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:07:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:07:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 3568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:07:48,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:07:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 03:07:49,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:07:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390380333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:49,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:07:49,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:07:49,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30309981] [2021-11-23 03:07:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:49,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:07:49,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:07:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:49,271 INFO L87 Difference]: Start difference. First operand 89785 states and 131578 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:07:51,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:07:53,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:07:57,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:08:03,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:08:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:06,869 INFO L93 Difference]: Finished difference Result 122499 states and 179400 transitions. [2021-11-23 03:08:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:08:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 146 [2021-11-23 03:08:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:07,417 INFO L225 Difference]: With dead ends: 122499 [2021-11-23 03:08:07,417 INFO L226 Difference]: Without dead ends: 122483 [2021-11-23 03:08:07,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:08:07,470 INFO L933 BasicCegarLoop]: 4011 mSDtfsCounter, 2940 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2943 SdHoareTripleChecker+Valid, 6774 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:07,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2943 Valid, 6774 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 748 Invalid, 4 Unknown, 0 Unchecked, 14.9s Time] [2021-11-23 03:08:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122483 states. [2021-11-23 03:08:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122483 to 122480. [2021-11-23 03:08:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122480 states, 73347 states have (on average 1.327170845433351) internal successors, (97344), 76646 states have internal predecessors, (97344), 40861 states have call successors, (40861), 8292 states have call predecessors, (40861), 8271 states have return successors, (41160), 40246 states have call predecessors, (41160), 40856 states have call successors, (41160) [2021-11-23 03:08:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122480 states to 122480 states and 179365 transitions. [2021-11-23 03:08:14,525 INFO L78 Accepts]: Start accepts. Automaton has 122480 states and 179365 transitions. Word has length 146 [2021-11-23 03:08:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:14,525 INFO L470 AbstractCegarLoop]: Abstraction has 122480 states and 179365 transitions. [2021-11-23 03:08:14,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:08:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 122480 states and 179365 transitions. [2021-11-23 03:08:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 03:08:14,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:14,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:14,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:08:14,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:08:14,828 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:14,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1979538314, now seen corresponding path program 1 times [2021-11-23 03:08:14,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:14,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932773889] [2021-11-23 03:08:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:14,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:08:15,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:15,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932773889] [2021-11-23 03:08:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932773889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:08:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527332841] [2021-11-23 03:08:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:15,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:15,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:15,075 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:15,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09806b39-ede3-4d29-83ac-ef082447457c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:08:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3570 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:08:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 03:08:17,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:08:17,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527332841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:17,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:08:17,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:08:17,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62554317] [2021-11-23 03:08:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:17,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:08:17,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:08:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:08:17,222 INFO L87 Difference]: Start difference. First operand 122480 states and 179365 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-23 03:08:19,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:08:21,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:08:25,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:08:28,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:08:32,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:08:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:37,431 INFO L93 Difference]: Finished difference Result 190638 states and 280104 transitions. [2021-11-23 03:08:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:08:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 147 [2021-11-23 03:08:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:38,374 INFO L225 Difference]: With dead ends: 190638 [2021-11-23 03:08:38,374 INFO L226 Difference]: Without dead ends: 190620 [2021-11-23 03:08:38,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:08:38,459 INFO L933 BasicCegarLoop]: 4004 mSDtfsCounter, 2872 mSDsluCounter, 3068 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2874 SdHoareTripleChecker+Valid, 6750 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:38,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2874 Valid, 6750 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 746 Invalid, 4 Unknown, 0 Unchecked, 15.6s Time] [2021-11-23 03:08:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190620 states.