./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--synclink.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_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/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_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclink.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/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_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/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 51be78885ca7a0fdf86d7aa977405871bdb86d4d67702760ccb1fc038e7f33e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:36:04,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:36:04,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:36:04,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:36:04,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:36:04,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:36:04,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:36:04,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:36:04,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:36:04,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:36:04,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:36:04,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:36:04,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:36:04,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:36:04,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:36:04,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:36:04,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:36:04,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:36:04,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:36:04,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:36:04,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:36:04,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:36:04,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:36:04,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:36:04,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:36:04,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:36:04,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:36:04,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:36:04,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:36:04,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:36:04,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:36:04,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:36:04,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:36:04,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:36:04,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:36:04,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:36:04,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:36:04,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:36:04,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:36:04,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:36:04,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:36:04,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:36:04,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:36:04,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:36:04,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:36:04,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:36:04,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:36:04,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:36:04,435 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:36:04,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:36:04,436 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:36:04,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:36:04,437 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:36:04,437 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:36:04,437 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:36:04,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:36:04,438 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:36:04,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:36:04,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:36:04,439 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:36:04,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:36:04,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:36:04,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:36:04,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:36:04,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:36:04,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:36:04,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:36:04,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:36:04,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:36:04,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:36:04,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:36:04,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:36:04,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:36:04,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:36:04,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:36:04,445 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:36:04,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:36:04,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:36:04,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:36:04,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:36:04,446 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_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51be78885ca7a0fdf86d7aa977405871bdb86d4d67702760ccb1fc038e7f33e2 [2021-11-23 02:36:04,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:36:04,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:36:04,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:36:04,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:36:04,728 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:36:04,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclink.ko-main.cil.out.i [2021-11-23 02:36:04,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/data/a59c0f69e/e41aa034c3894b9cbdea98d608d41322/FLAG858bdf5ae [2021-11-23 02:36:05,926 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:36:05,927 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclink.ko-main.cil.out.i [2021-11-23 02:36:05,971 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/data/a59c0f69e/e41aa034c3894b9cbdea98d608d41322/FLAG858bdf5ae [2021-11-23 02:36:06,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/data/a59c0f69e/e41aa034c3894b9cbdea98d608d41322 [2021-11-23 02:36:06,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:36:06,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:36:06,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:36:06,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:36:06,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:36:06,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:36:06" (1/1) ... [2021-11-23 02:36:06,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192781c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:06, skipping insertion in model container [2021-11-23 02:36:06,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:36:06" (1/1) ... [2021-11-23 02:36:06,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:36:06,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:36:09,430 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_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclink.ko-main.cil.out.i[420085,420098] [2021-11-23 02:36:09,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:36:09,649 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:36:10,195 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_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclink.ko-main.cil.out.i[420085,420098] [2021-11-23 02:36:10,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:36:10,433 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:36:10,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10 WrapperNode [2021-11-23 02:36:10,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:36:10,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:36:10,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:36:10,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:36:10,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:10,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:10,900 INFO L137 Inliner]: procedures = 395, calls = 4058, calls flagged for inlining = 199, calls inlined = 146, statements flattened = 7281 [2021-11-23 02:36:10,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:36:10,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:36:10,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:36:10,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:36:10,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:10,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:10,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:10,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:11,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:11,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:11,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:11,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:36:11,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:36:11,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:36:11,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:36:11,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (1/1) ... [2021-11-23 02:36:11,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:36:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:11,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:36:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab6d6faa-84e6-448b-9882-9b88fb6e44c9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:36:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_wait_until_sent [2021-11-23 02:36:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_wait_until_sent [2021-11-23 02:36:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-23 02:36:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:36:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:36:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_start [2021-11-23 02:36:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_start [2021-11-23 02:36:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure usc_set_txidle [2021-11-23 02:36:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_set_txidle [2021-11-23 02:36:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_ioctl [2021-11-23 02:36:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_ioctl [2021-11-23 02:36:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:36:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:36:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure usc_loopback_frame [2021-11-23 02:36:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_loopback_frame [2021-11-23 02:36:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2021-11-23 02:36:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2021-11-23 02:36:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure usc_start_receiver [2021-11-23 02:36:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_start_receiver [2021-11-23 02:36:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure usc_set_serial_signals [2021-11-23 02:36:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_set_serial_signals [2021-11-23 02:36:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_trace_block [2021-11-23 02:36:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_trace_block [2021-11-23 02:36:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 02:36:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 02:36:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:36:11,382 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:36:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mgsl_ops_disconnect_2 [2021-11-23 02:36:11,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mgsl_ops_disconnect_2 [2021-11-23 02:36:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2021-11-23 02:36:11,382 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2021-11-23 02:36:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:36:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:36:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 02:36:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure startup [2021-11-23 02:36:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure startup [2021-11-23 02:36:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure load_next_tx_holding_buffer [2021-11-23 02:36:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure load_next_tx_holding_buffer [2021-11-23 02:36:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:36:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:36:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_tty_port [2021-11-23 02:36:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_tty_port [2021-11-23 02:36:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:36:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure dtr_rts [2021-11-23 02:36:11,385 INFO L138 BoogieDeclarations]: Found implementation of procedure dtr_rts [2021-11-23 02:36:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:36:11,385 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:36:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-23 02:36:11,386 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-23 02:36:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-23 02:36:11,387 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-23 02:36:11,387 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:36:11,388 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:36:11,388 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmset [2021-11-23 02:36:11,388 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmset [2021-11-23 02:36:11,388 INFO L130 BoogieDeclarations]: Found specification of procedure usc_OutDmaReg [2021-11-23 02:36:11,388 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_OutDmaReg [2021-11-23 02:36:11,388 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:36:11,388 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:36:11,389 INFO L130 BoogieDeclarations]: Found specification of procedure usc_loopmode_cancel_transmit [2021-11-23 02:36:11,389 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_loopmode_cancel_transmit [2021-11-23 02:36:11,389 INFO L130 BoogieDeclarations]: Found specification of procedure usc_load_txfifo [2021-11-23 02:36:11,389 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_load_txfifo [2021-11-23 02:36:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:36:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:36:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_tx_timeout [2021-11-23 02:36:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_tx_timeout [2021-11-23 02:36:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:36:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:36:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:36:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:36:11,391 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:36:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:36:11,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:36:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:36:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:36:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure usc_reset [2021-11-23 02:36:11,392 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_reset [2021-11-23 02:36:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_free_frame_memory [2021-11-23 02:36:11,392 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_free_frame_memory [2021-11-23 02:36:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure usc_InReg [2021-11-23 02:36:11,393 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_InReg [2021-11-23 02:36:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-23 02:36:11,393 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-23 02:36:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure usc_enable_loopback [2021-11-23 02:36:11,394 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_enable_loopback [2021-11-23 02:36:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_load_tx_dma_buffer [2021-11-23 02:36:11,394 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_load_tx_dma_buffer [2021-11-23 02:36:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure usc_DmaCmd [2021-11-23 02:36:11,395 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_DmaCmd [2021-11-23 02:36:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_flush_buffer [2021-11-23 02:36:11,395 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_flush_buffer [2021-11-23 02:36:11,396 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:36:11,396 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:36:11,396 INFO L130 BoogieDeclarations]: Found specification of procedure carrier_raised [2021-11-23 02:36:11,397 INFO L138 BoogieDeclarations]: Found implementation of procedure carrier_raised [2021-11-23 02:36:11,397 INFO L130 BoogieDeclarations]: Found specification of procedure usc_RTCmd [2021-11-23 02:36:11,397 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_RTCmd [2021-11-23 02:36:11,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:36:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure usc_set_sdlc_mode [2021-11-23 02:36:11,489 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_set_sdlc_mode [2021-11-23 02:36:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure usc_stop_receiver [2021-11-23 02:36:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_stop_receiver [2021-11-23 02:36:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:36:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:36:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:36:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:36:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:36:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_add_device [2021-11-23 02:36:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_add_device [2021-11-23 02:36:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_unthrottle [2021-11-23 02:36:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_unthrottle [2021-11-23 02:36:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_throttle [2021-11-23 02:36:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_throttle [2021-11-23 02:36:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure usc_OutReg [2021-11-23 02:36:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_OutReg [2021-11-23 02:36:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:36:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:36:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmget [2021-11-23 02:36:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmget [2021-11-23 02:36:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_set_termios [2021-11-23 02:36:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_set_termios [2021-11-23 02:36:11,492 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:36:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:36:11,492 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:36:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:36:11,492 INFO L130 BoogieDeclarations]: Found specification of procedure usc_stop_transmitter [2021-11-23 02:36:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_stop_transmitter [2021-11-23 02:36:11,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:36:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:36:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2021-11-23 02:36:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2021-11-23 02:36:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:36:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:36:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_flush_chars [2021-11-23 02:36:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_flush_chars [2021-11-23 02:36:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:36:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:36:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:36:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:36:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_send_xchar [2021-11-23 02:36:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_send_xchar [2021-11-23 02:36:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_change_params [2021-11-23 02:36:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_change_params [2021-11-23 02:36:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:36:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:36:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:36:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:36:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure usc_get_serial_signals [2021-11-23 02:36:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_get_serial_signals [2021-11-23 02:36:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_reset_rx_dma_buffers [2021-11-23 02:36:11,495 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_reset_rx_dma_buffers [2021-11-23 02:36:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:36:11,495 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:36:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:36:11,495 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:36:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure usc_start_transmitter [2021-11-23 02:36:11,495 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_start_transmitter [2021-11-23 02:36:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-23 02:36:11,495 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-23 02:36:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-11-23 02:36:11,495 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:36:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_paranoia_check [2021-11-23 02:36:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_paranoia_check [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure usc_InDmaReg [2021-11-23 02:36:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_InDmaReg [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure usc_loopmode_active [2021-11-23 02:36:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_loopmode_active [2021-11-23 02:36:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_stop [2021-11-23 02:36:11,497 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_stop [2021-11-23 02:36:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 02:36:11,497 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 02:36:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:36:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure synclink_remove_one [2021-11-23 02:36:11,497 INFO L138 BoogieDeclarations]: Found implementation of procedure synclink_remove_one [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:36:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure synclink_cleanup [2021-11-23 02:36:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure synclink_cleanup [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-11-23 02:36:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:36:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-23 02:36:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:36:11,499 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:36:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_write_room [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_write_room [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_break [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_break [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_allocate_device [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_allocate_device [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_install [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_install [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hung_up_p [2021-11-23 02:36:11,500 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hung_up_p [2021-11-23 02:36:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_release_resources [2021-11-23 02:36:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_release_resources [2021-11-23 02:36:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-23 02:36:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-23 02:36:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:36:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:36:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:36:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:36:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure usc_loopmode_send_done [2021-11-23 02:36:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure usc_loopmode_send_done [2021-11-23 02:36:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:36:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:36:11,502 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-23 02:36:11,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-23 02:36:11,502 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:36:11,502 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:36:11,502 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_ioctl [2021-11-23 02:36:11,502 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_ioctl [2021-11-23 02:36:11,502 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_tty_port [2021-11-23 02:36:11,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_tty_port [2021-11-23 02:36:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:36:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:36:11,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:36:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure msgl_get_icount [2021-11-23 02:36:11,503 INFO L138 BoogieDeclarations]: Found implementation of procedure msgl_get_icount [2021-11-23 02:36:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_chars_in_buffer [2021-11-23 02:36:11,503 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_chars_in_buffer [2021-11-23 02:36:11,503 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 02:36:11,503 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 02:36:11,504 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-11-23 02:36:11,504 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-11-23 02:36:11,504 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:36:11,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:36:11,504 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_put_char [2021-11-23 02:36:11,504 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_put_char [2021-11-23 02:36:11,504 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_program_hw [2021-11-23 02:36:11,504 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_program_hw [2021-11-23 02:36:11,505 INFO L130 BoogieDeclarations]: Found specification of procedure shutdown [2021-11-23 02:36:11,505 INFO L138 BoogieDeclarations]: Found implementation of procedure shutdown [2021-11-23 02:36:11,505 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_hangup [2021-11-23 02:36:11,505 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_hangup [2021-11-23 02:36:11,505 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-23 02:36:11,505 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-23 02:36:11,505 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-23 02:36:11,505 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-23 02:36:11,505 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-23 02:36:11,506 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-23 02:36:11,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:36:11,506 INFO L130 BoogieDeclarations]: Found specification of procedure mgsl_alloc_frame_memory [2021-11-23 02:36:11,506 INFO L138 BoogieDeclarations]: Found implementation of procedure mgsl_alloc_frame_memory [2021-11-23 02:36:11,506 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-23 02:36:11,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-23 02:36:11,506 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-23 02:36:11,506 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-23 02:36:12,494 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:36:12,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:36:36,949 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:36:40,381 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:36:40,381 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:36:40,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:36:40 BoogieIcfgContainer [2021-11-23 02:36:40,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:36:40,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:36:40,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:36:40,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:36:40,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:36:06" (1/3) ... [2021-11-23 02:36:40,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a601b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:36:40, skipping insertion in model container [2021-11-23 02:36:40,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:36:10" (2/3) ... [2021-11-23 02:36:40,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a601b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:36:40, skipping insertion in model container [2021-11-23 02:36:40,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:36:40" (3/3) ... [2021-11-23 02:36:40,399 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--tty--synclink.ko-main.cil.out.i [2021-11-23 02:36:40,404 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:36:40,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:36:40,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:36:40,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:36:40,494 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:36:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 2417 states, 1405 states have (on average 1.3516014234875444) internal successors, (1899), 1482 states have internal predecessors, (1899), 890 states have call successors, (890), 120 states have call predecessors, (890), 120 states have return successors, (890), 870 states have call predecessors, (890), 890 states have call successors, (890) [2021-11-23 02:36:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:36:40,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:40,702 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 02:36:40,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash -142964827, now seen corresponding path program 1 times [2021-11-23 02:36:40,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:40,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461709005] [2021-11-23 02:36:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:40,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:36:41,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461709005] [2021-11-23 02:36:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461709005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:41,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:41,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:36:41,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781933382] [2021-11-23 02:36:41,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:41,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:36:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:36:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:36:41,423 INFO L87 Difference]: Start difference. First operand has 2417 states, 1405 states have (on average 1.3516014234875444) internal successors, (1899), 1482 states have internal predecessors, (1899), 890 states have call successors, (890), 120 states have call predecessors, (890), 120 states have return successors, (890), 870 states have call predecessors, (890), 890 states have call successors, (890) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:36:43,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:45,707 WARN L534 Checker$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 02:36:47,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:49,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:52,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:58,032 INFO L93 Difference]: Finished difference Result 7217 states and 11015 transitions. [2021-11-23 02:36:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:36:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-23 02:36:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:58,123 INFO L225 Difference]: With dead ends: 7217 [2021-11-23 02:36:58,124 INFO L226 Difference]: Without dead ends: 4797 [2021-11-23 02:36:58,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:36:58,164 INFO L933 BasicCegarLoop]: 5131 mSDtfsCounter, 3633 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 8450 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:58,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 8450 Invalid, 784 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 778 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2021-11-23 02:36:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-11-23 02:36:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4791. [2021-11-23 02:36:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 2785 states have (on average 1.3486535008976661) internal successors, (3756), 2929 states have internal predecessors, (3756), 1767 states have call successors, (1767), 239 states have call predecessors, (1767), 238 states have return successors, (1764), 1720 states have call predecessors, (1764), 1761 states have call successors, (1764) [2021-11-23 02:36:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 7287 transitions. [2021-11-23 02:36:58,741 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 7287 transitions. Word has length 19 [2021-11-23 02:36:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:58,742 INFO L470 AbstractCegarLoop]: Abstraction has 4791 states and 7287 transitions. [2021-11-23 02:36:58,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:36:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 7287 transitions. [2021-11-23 02:36:58,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:36:58,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:58,755 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] [2021-11-23 02:36:58,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:36:58,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash 91319653, now seen corresponding path program 1 times [2021-11-23 02:36:58,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:58,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947892648] [2021-11-23 02:36:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:58,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:36:59,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947892648] [2021-11-23 02:36:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947892648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:59,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:59,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:36:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927160903] [2021-11-23 02:36:59,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:36:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:36:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:36:59,027 INFO L87 Difference]: Start difference. First operand 4791 states and 7287 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 02:37:01,311 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 02:37:03,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:37:07,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:09,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:14,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:16,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:19,005 INFO L93 Difference]: Finished difference Result 7941 states and 12120 transitions. [2021-11-23 02:37:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:37:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 28 [2021-11-23 02:37:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:19,058 INFO L225 Difference]: With dead ends: 7941 [2021-11-23 02:37:19,058 INFO L226 Difference]: Without dead ends: 5375 [2021-11-23 02:37:19,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:19,089 INFO L933 BasicCegarLoop]: 4232 mSDtfsCounter, 1190 mSDsluCounter, 7693 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 368 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 11262 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:19,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1192 Valid, 11262 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1061 Invalid, 4 Unknown, 0 Unchecked, 19.7s Time] [2021-11-23 02:37:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2021-11-23 02:37:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 4791. [2021-11-23 02:37:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 2785 states have (on average 1.3482944344703771) internal successors, (3755), 2929 states have internal predecessors, (3755), 1767 states have call successors, (1767), 239 states have call predecessors, (1767), 238 states have return successors, (1764), 1720 states have call predecessors, (1764), 1761 states have call successors, (1764) [2021-11-23 02:37:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 7286 transitions. [2021-11-23 02:37:19,415 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 7286 transitions. Word has length 28 [2021-11-23 02:37:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:19,416 INFO L470 AbstractCegarLoop]: Abstraction has 4791 states and 7286 transitions. [2021-11-23 02:37:19,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 02:37:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 7286 transitions. [2021-11-23 02:37:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:37:19,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:19,429 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] [2021-11-23 02:37:19,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:37:19,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1748487048, now seen corresponding path program 1 times [2021-11-23 02:37:19,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:19,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803722327] [2021-11-23 02:37:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:19,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:19,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803722327] [2021-11-23 02:37:19,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803722327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:19,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:19,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:19,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122333445] [2021-11-23 02:37:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:19,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:37:19,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:19,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:37:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:37:19,729 INFO L87 Difference]: Start difference. First operand 4791 states and 7286 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 02:37:21,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:24,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:37:27,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:31,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:33,410 WARN L534 Checker$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 02:37:34,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:41,601 INFO L93 Difference]: Finished difference Result 10139 states and 15503 transitions. [2021-11-23 02:37:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:41,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 29 [2021-11-23 02:37:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:41,709 INFO L225 Difference]: With dead ends: 10139 [2021-11-23 02:37:41,709 INFO L226 Difference]: Without dead ends: 10128 [2021-11-23 02:37:41,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:41,719 INFO L933 BasicCegarLoop]: 5817 mSDtfsCounter, 4433 mSDsluCounter, 9388 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 189 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4436 SdHoareTripleChecker+Valid, 14441 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:41,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4436 Valid, 14441 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1438 Invalid, 3 Unknown, 0 Unchecked, 21.4s Time] [2021-11-23 02:37:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10128 states. [2021-11-23 02:37:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10128 to 9540. [2021-11-23 02:37:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9540 states, 5544 states have (on average 1.348124098124098) internal successors, (7474), 5827 states have internal predecessors, (7474), 3520 states have call successors, (3520), 476 states have call predecessors, (3520), 475 states have return successors, (3523), 3431 states have call predecessors, (3523), 3514 states have call successors, (3523) [2021-11-23 02:37:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9540 states to 9540 states and 14517 transitions. [2021-11-23 02:37:42,515 INFO L78 Accepts]: Start accepts. Automaton has 9540 states and 14517 transitions. Word has length 29 [2021-11-23 02:37:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:42,515 INFO L470 AbstractCegarLoop]: Abstraction has 9540 states and 14517 transitions. [2021-11-23 02:37:42,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 02:37:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 9540 states and 14517 transitions. [2021-11-23 02:37:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:37:42,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:42,524 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] [2021-11-23 02:37:42,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:37:42,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:42,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash -724247322, now seen corresponding path program 1 times [2021-11-23 02:37:42,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:42,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359051341] [2021-11-23 02:37:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:42,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:42,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:42,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359051341] [2021-11-23 02:37:42,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359051341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:42,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:42,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:37:42,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990054921] [2021-11-23 02:37:42,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:42,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:42,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:42,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:37:42,730 INFO L87 Difference]: Start difference. First operand 9540 states and 14517 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:37:44,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:47,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:37:49,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:52,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:57,261 INFO L93 Difference]: Finished difference Result 21857 states and 33073 transitions. [2021-11-23 02:37:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:37:57,261 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-23 02:37:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:57,360 INFO L225 Difference]: With dead ends: 21857 [2021-11-23 02:37:57,361 INFO L226 Difference]: Without dead ends: 12318 [2021-11-23 02:37:57,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:37:57,434 INFO L933 BasicCegarLoop]: 4417 mSDtfsCounter, 1890 mSDsluCounter, 3382 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 7474 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:57,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1891 Valid, 7474 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 998 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 02:37:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12318 states. [2021-11-23 02:37:58,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12318 to 9811. [2021-11-23 02:37:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 5623 states have (on average 1.333451894006758) internal successors, (7498), 5905 states have internal predecessors, (7498), 3658 states have call successors, (3658), 530 states have call predecessors, (3658), 529 states have return successors, (3660), 3558 states have call predecessors, (3660), 3652 states have call successors, (3660) [2021-11-23 02:37:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 14816 transitions. [2021-11-23 02:37:58,155 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 14816 transitions. Word has length 35 [2021-11-23 02:37:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 14816 transitions. [2021-11-23 02:37:58,156 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:37:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 14816 transitions. [2021-11-23 02:37:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:37:58,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:58,162 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] [2021-11-23 02:37:58,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:37:58,162 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2082286460, now seen corresponding path program 1 times [2021-11-23 02:37:58,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:58,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550428816] [2021-11-23 02:37:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:58,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:37:58,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550428816] [2021-11-23 02:37:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550428816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:58,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:58,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:37:58,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082667270] [2021-11-23 02:37:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:58,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:37:58,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:37:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:37:58,425 INFO L87 Difference]: Start difference. First operand 9811 states and 14816 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:38:00,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:01,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:04,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:38:06,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:11,692 INFO L93 Difference]: Finished difference Result 14842 states and 22357 transitions. [2021-11-23 02:38:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-11-23 02:38:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:11,785 INFO L225 Difference]: With dead ends: 14842 [2021-11-23 02:38:11,785 INFO L226 Difference]: Without dead ends: 14839 [2021-11-23 02:38:11,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:11,799 INFO L933 BasicCegarLoop]: 6013 mSDtfsCounter, 3629 mSDsluCounter, 3654 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3632 SdHoareTripleChecker+Valid, 9337 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:11,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3632 Valid, 9337 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 867 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 02:38:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14839 states. [2021-11-23 02:38:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14839 to 14835. [2021-11-23 02:38:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14835 states, 8465 states have (on average 1.3285292380389842) internal successors, (11246), 8883 states have internal predecessors, (11246), 5549 states have call successors, (5549), 821 states have call predecessors, (5549), 820 states have return successors, (5556), 5398 states have call predecessors, (5556), 5543 states have call successors, (5556) [2021-11-23 02:38:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14835 states to 14835 states and 22351 transitions. [2021-11-23 02:38:13,021 INFO L78 Accepts]: Start accepts. Automaton has 14835 states and 22351 transitions. Word has length 35 [2021-11-23 02:38:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:13,022 INFO L470 AbstractCegarLoop]: Abstraction has 14835 states and 22351 transitions. [2021-11-23 02:38:13,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:38:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14835 states and 22351 transitions. [2021-11-23 02:38:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:38:13,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:13,026 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] [2021-11-23 02:38:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:38:13,027 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2090785033, now seen corresponding path program 1 times [2021-11-23 02:38:13,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341273236] [2021-11-23 02:38:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:13,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:13,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:13,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341273236] [2021-11-23 02:38:13,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341273236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:13,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:13,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:38:13,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318994731] [2021-11-23 02:38:13,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:13,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:38:13,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:13,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:38:13,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:38:13,298 INFO L87 Difference]: Start difference. First operand 14835 states and 22351 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:38:15,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:17,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:19,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:38:21,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:29,231 INFO L93 Difference]: Finished difference Result 22045 states and 33272 transitions. [2021-11-23 02:38:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:38:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-23 02:38:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:29,321 INFO L225 Difference]: With dead ends: 22045 [2021-11-23 02:38:29,321 INFO L226 Difference]: Without dead ends: 15554 [2021-11-23 02:38:29,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:38:29,358 INFO L933 BasicCegarLoop]: 3806 mSDtfsCounter, 1182 mSDsluCounter, 7475 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 364 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 10618 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:29,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 10618 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1047 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2021-11-23 02:38:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15554 states. [2021-11-23 02:38:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15554 to 14837. [2021-11-23 02:38:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14837 states, 8467 states have (on average 1.3284516357623715) internal successors, (11248), 8885 states have internal predecessors, (11248), 5549 states have call successors, (5549), 821 states have call predecessors, (5549), 820 states have return successors, (5556), 5398 states have call predecessors, (5556), 5543 states have call successors, (5556) [2021-11-23 02:38:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14837 states to 14837 states and 22353 transitions. [2021-11-23 02:38:30,551 INFO L78 Accepts]: Start accepts. Automaton has 14837 states and 22353 transitions. Word has length 36 [2021-11-23 02:38:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 14837 states and 22353 transitions. [2021-11-23 02:38:30,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:38:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14837 states and 22353 transitions. [2021-11-23 02:38:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:38:30,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:30,555 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] [2021-11-23 02:38:30,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:38:30,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 124789392, now seen corresponding path program 1 times [2021-11-23 02:38:30,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211395523] [2021-11-23 02:38:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:30,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:30,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211395523] [2021-11-23 02:38:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211395523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:30,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:30,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:30,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758855823] [2021-11-23 02:38:30,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:30,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:30,762 INFO L87 Difference]: Start difference. First operand 14837 states and 22353 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:38:32,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:36,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:38:38,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:44,278 INFO L93 Difference]: Finished difference Result 14845 states and 22360 transitions. [2021-11-23 02:38:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:38:44,278 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-23 02:38:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:44,356 INFO L225 Difference]: With dead ends: 14845 [2021-11-23 02:38:44,357 INFO L226 Difference]: Without dead ends: 14842 [2021-11-23 02:38:44,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:44,371 INFO L933 BasicCegarLoop]: 6012 mSDtfsCounter, 3626 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3629 SdHoareTripleChecker+Valid, 9339 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:44,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3629 Valid, 9339 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 867 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2021-11-23 02:38:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14842 states. [2021-11-23 02:38:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14842 to 14838. [2021-11-23 02:38:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14838 states, 8468 states have (on average 1.3284128483703355) internal successors, (11249), 8886 states have internal predecessors, (11249), 5549 states have call successors, (5549), 821 states have call predecessors, (5549), 820 states have return successors, (5556), 5398 states have call predecessors, (5556), 5543 states have call successors, (5556) [2021-11-23 02:38:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14838 states to 14838 states and 22354 transitions. [2021-11-23 02:38:45,592 INFO L78 Accepts]: Start accepts. Automaton has 14838 states and 22354 transitions. Word has length 36 [2021-11-23 02:38:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 14838 states and 22354 transitions. [2021-11-23 02:38:45,593 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:38:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14838 states and 22354 transitions. [2021-11-23 02:38:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:38:45,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:45,596 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] [2021-11-23 02:38:45,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:38:45,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash -428072705, now seen corresponding path program 1 times [2021-11-23 02:38:45,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:45,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450384615] [2021-11-23 02:38:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:45,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:38:45,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:45,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450384615] [2021-11-23 02:38:45,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450384615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:45,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:38:45,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:38:45,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021421729] [2021-11-23 02:38:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:45,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:38:45,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:38:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:38:45,804 INFO L87 Difference]: Start difference. First operand 14838 states and 22354 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:38:47,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:50,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:38:53,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:55,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:58,008 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 02:39:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:01,855 INFO L93 Difference]: Finished difference Result 21320 states and 32064 transitions. [2021-11-23 02:39:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:01,855 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-11-23 02:39:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:01,957 INFO L225 Difference]: With dead ends: 21320 [2021-11-23 02:39:01,957 INFO L226 Difference]: Without dead ends: 21317 [2021-11-23 02:39:01,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:01,976 INFO L933 BasicCegarLoop]: 6015 mSDtfsCounter, 3631 mSDsluCounter, 3661 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3634 SdHoareTripleChecker+Valid, 9345 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:01,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3634 Valid, 9345 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 869 Invalid, 2 Unknown, 0 Unchecked, 15.6s Time] [2021-11-23 02:39:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21317 states. [2021-11-23 02:39:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21317 to 20979. [2021-11-23 02:39:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20979 states, 11999 states have (on average 1.3307775647970663) internal successors, (15968), 12590 states have internal predecessors, (15968), 7825 states have call successors, (7825), 1155 states have call predecessors, (7825), 1154 states have return successors, (7839), 7617 states have call predecessors, (7839), 7819 states have call successors, (7839) [2021-11-23 02:39:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20979 states to 20979 states and 31632 transitions. [2021-11-23 02:39:03,670 INFO L78 Accepts]: Start accepts. Automaton has 20979 states and 31632 transitions. Word has length 37 [2021-11-23 02:39:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:03,673 INFO L470 AbstractCegarLoop]: Abstraction has 20979 states and 31632 transitions. [2021-11-23 02:39:03,673 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:39:03,673 INFO L276 IsEmpty]: Start isEmpty. Operand 20979 states and 31632 transitions. [2021-11-23 02:39:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:39:03,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:03,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:39:03,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:39:03,678 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash -386923661, now seen corresponding path program 1 times [2021-11-23 02:39:03,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297815766] [2021-11-23 02:39:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:03,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:03,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:03,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297815766] [2021-11-23 02:39:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297815766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:39:03,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:39:03,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:39:03,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958988982] [2021-11-23 02:39:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:39:03,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:39:03,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:39:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:39:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:03,853 INFO L87 Difference]: Start difference. First operand 20979 states and 31632 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:39:05,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:07,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:09,766 WARN L534 Checker$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 02:39:11,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:19,128 INFO L93 Difference]: Finished difference Result 36915 states and 55684 transitions. [2021-11-23 02:39:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:19,129 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-11-23 02:39:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:19,309 INFO L225 Difference]: With dead ends: 36915 [2021-11-23 02:39:19,309 INFO L226 Difference]: Without dead ends: 36873 [2021-11-23 02:39:19,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:19,338 INFO L933 BasicCegarLoop]: 5989 mSDtfsCounter, 3565 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 9306 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:19,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3567 Valid, 9306 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 868 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2021-11-23 02:39:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36873 states. [2021-11-23 02:39:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36873 to 36868. [2021-11-23 02:39:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36868 states, 21130 states have (on average 1.3323237103644108) internal successors, (28152), 22183 states have internal predecessors, (28152), 13708 states have call successors, (13708), 2035 states have call predecessors, (13708), 2029 states have return successors, (13760), 13330 states have call predecessors, (13760), 13702 states have call successors, (13760) [2021-11-23 02:39:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36868 states to 36868 states and 55620 transitions. [2021-11-23 02:39:21,203 INFO L78 Accepts]: Start accepts. Automaton has 36868 states and 55620 transitions. Word has length 38 [2021-11-23 02:39:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:21,203 INFO L470 AbstractCegarLoop]: Abstraction has 36868 states and 55620 transitions. [2021-11-23 02:39:21,203 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:39:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 36868 states and 55620 transitions. [2021-11-23 02:39:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:39:21,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:21,206 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 02:39:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:39:21,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash 43580582, now seen corresponding path program 1 times [2021-11-23 02:39:21,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724640822] [2021-11-23 02:39:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:21,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:21,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724640822] [2021-11-23 02:39:21,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724640822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:39:21,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:39:21,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:39:21,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614254104] [2021-11-23 02:39:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:39:21,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:39:21,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:39:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:39:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:21,392 INFO L87 Difference]: Start difference. First operand 36868 states and 55620 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 02:39:23,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:25,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:39:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:29,542 INFO L93 Difference]: Finished difference Result 37300 states and 56274 transitions. [2021-11-23 02:39:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:29,543 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 02:39:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:29,745 INFO L225 Difference]: With dead ends: 37300 [2021-11-23 02:39:29,745 INFO L226 Difference]: Without dead ends: 37297 [2021-11-23 02:39:29,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:29,777 INFO L933 BasicCegarLoop]: 3571 mSDtfsCounter, 3637 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3640 SdHoareTripleChecker+Valid, 4185 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:29,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3640 Valid, 4185 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 373 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 02:39:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37297 states. [2021-11-23 02:39:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37297 to 37297. [2021-11-23 02:39:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37297 states, 21324 states have (on average 1.3306133933595947) internal successors, (28374), 22393 states have internal predecessors, (28374), 13919 states have call successors, (13919), 2058 states have call predecessors, (13919), 2053 states have return successors, (13975), 13533 states have call predecessors, (13975), 13914 states have call successors, (13975) [2021-11-23 02:39:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37297 states to 37297 states and 56268 transitions. [2021-11-23 02:39:31,975 INFO L78 Accepts]: Start accepts. Automaton has 37297 states and 56268 transitions. Word has length 40 [2021-11-23 02:39:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:31,975 INFO L470 AbstractCegarLoop]: Abstraction has 37297 states and 56268 transitions. [2021-11-23 02:39:31,975 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 02:39:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 37297 states and 56268 transitions. [2021-11-23 02:39:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:39:31,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:31,979 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 02:39:31,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:39:31,979 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1349416614, now seen corresponding path program 1 times [2021-11-23 02:39:31,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:31,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373789368] [2021-11-23 02:39:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:31,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:32,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:32,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373789368] [2021-11-23 02:39:32,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373789368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:39:32,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:39:32,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:39:32,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29412484] [2021-11-23 02:39:32,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:39:32,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:39:32,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:39:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:39:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:32,145 INFO L87 Difference]: Start difference. First operand 37297 states and 56268 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 02:39:34,439 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 02:39:36,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:39:40,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:42,853 INFO L93 Difference]: Finished difference Result 37299 states and 56269 transitions. [2021-11-23 02:39:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:42,854 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 02:39:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:42,995 INFO L225 Difference]: With dead ends: 37299 [2021-11-23 02:39:42,995 INFO L226 Difference]: Without dead ends: 37244 [2021-11-23 02:39:43,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:43,012 INFO L933 BasicCegarLoop]: 3569 mSDtfsCounter, 3628 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 4183 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:43,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 4183 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 372 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 02:39:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37244 states. [2021-11-23 02:39:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37244 to 37244. [2021-11-23 02:39:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37244 states, 21296 states have (on average 1.3304376408715253) internal successors, (28333), 22356 states have internal predecessors, (28333), 13903 states have call successors, (13903), 2049 states have call predecessors, (13903), 2044 states have return successors, (13960), 13520 states have call predecessors, (13960), 13899 states have call successors, (13960) [2021-11-23 02:39:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37244 states to 37244 states and 56196 transitions. [2021-11-23 02:39:45,137 INFO L78 Accepts]: Start accepts. Automaton has 37244 states and 56196 transitions. Word has length 41 [2021-11-23 02:39:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:39:45,137 INFO L470 AbstractCegarLoop]: Abstraction has 37244 states and 56196 transitions. [2021-11-23 02:39:45,138 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 02:39:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 37244 states and 56196 transitions. [2021-11-23 02:39:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:39:45,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:39:45,142 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] [2021-11-23 02:39:45,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:39:45,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:39:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:39:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1119334487, now seen corresponding path program 1 times [2021-11-23 02:39:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:39:45,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022071745] [2021-11-23 02:39:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:39:45,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:39:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:39:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:39:45,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:39:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022071745] [2021-11-23 02:39:45,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022071745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:39:45,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:39:45,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:39:45,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710364591] [2021-11-23 02:39:45,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:39:45,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:39:45,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:39:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:39:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:45,308 INFO L87 Difference]: Start difference. First operand 37244 states and 56196 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 02:39:47,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:50,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:39:52,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:56,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:59,137 INFO L93 Difference]: Finished difference Result 44834 states and 67579 transitions. [2021-11-23 02:39:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:39:59,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 42 [2021-11-23 02:39:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:59,455 INFO L225 Difference]: With dead ends: 44834 [2021-11-23 02:39:59,455 INFO L226 Difference]: Without dead ends: 44794 [2021-11-23 02:39:59,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:39:59,473 INFO L933 BasicCegarLoop]: 4357 mSDtfsCounter, 3627 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 7683 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:59,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3630 Valid, 7683 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 686 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2021-11-23 02:39:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44794 states. [2021-11-23 02:40:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44794 to 44785. [2021-11-23 02:40:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44785 states, 25614 states have (on average 1.3299367533380182) internal successors, (34065), 26886 states have internal predecessors, (34065), 16693 states have call successors, (16693), 2483 states have call predecessors, (16693), 2477 states have return successors, (16762), 16232 states have call predecessors, (16762), 16689 states have call successors, (16762) [2021-11-23 02:40:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44785 states to 44785 states and 67520 transitions. [2021-11-23 02:40:01,960 INFO L78 Accepts]: Start accepts. Automaton has 44785 states and 67520 transitions. Word has length 42 [2021-11-23 02:40:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 44785 states and 67520 transitions. [2021-11-23 02:40:01,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 02:40:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 44785 states and 67520 transitions. [2021-11-23 02:40:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:40:01,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:01,965 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] [2021-11-23 02:40:01,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:40:01,966 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -341202423, now seen corresponding path program 1 times [2021-11-23 02:40:01,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:01,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548453149] [2021-11-23 02:40:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:01,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:02,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548453149] [2021-11-23 02:40:02,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548453149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:02,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:02,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:40:02,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195392146] [2021-11-23 02:40:02,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:02,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:40:02,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:40:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:40:02,137 INFO L87 Difference]: Start difference. First operand 44785 states and 67520 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 02:40:04,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:06,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:40:08,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:12,634 INFO L93 Difference]: Finished difference Result 46583 states and 69838 transitions. [2021-11-23 02:40:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:40:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 43 [2021-11-23 02:40:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:12,921 INFO L225 Difference]: With dead ends: 46583 [2021-11-23 02:40:12,921 INFO L226 Difference]: Without dead ends: 46495 [2021-11-23 02:40:12,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:40:12,951 INFO L933 BasicCegarLoop]: 3664 mSDtfsCounter, 3565 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 4559 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:12,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3567 Valid, 4559 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 425 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2021-11-23 02:40:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46495 states. [2021-11-23 02:40:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46495 to 34153. [2021-11-23 02:40:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34153 states, 19540 states have (on average 1.3250767656090072) internal successors, (25892), 20468 states have internal predecessors, (25892), 12606 states have call successors, (12606), 2006 states have call predecessors, (12606), 2006 states have return successors, (12652), 12290 states have call predecessors, (12652), 12604 states have call successors, (12652) [2021-11-23 02:40:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34153 states to 34153 states and 51150 transitions. [2021-11-23 02:40:15,275 INFO L78 Accepts]: Start accepts. Automaton has 34153 states and 51150 transitions. Word has length 43 [2021-11-23 02:40:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:15,276 INFO L470 AbstractCegarLoop]: Abstraction has 34153 states and 51150 transitions. [2021-11-23 02:40:15,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 02:40:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34153 states and 51150 transitions. [2021-11-23 02:40:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:40:15,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:15,314 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:15,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:40:15,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:15,315 INFO L85 PathProgramCache]: Analyzing trace with hash 930593721, now seen corresponding path program 1 times [2021-11-23 02:40:15,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:15,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807756338] [2021-11-23 02:40:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:15,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:15,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:15,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807756338] [2021-11-23 02:40:15,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807756338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:15,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:15,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:15,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124513023] [2021-11-23 02:40:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:15,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:40:15,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:40:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:40:15,710 INFO L87 Difference]: Start difference. First operand 34153 states and 51150 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:40:17,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:19,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:21,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:40:23,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:34,562 INFO L93 Difference]: Finished difference Result 89855 states and 135256 transitions. [2021-11-23 02:40:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2021-11-23 02:40:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:34,836 INFO L225 Difference]: With dead ends: 89855 [2021-11-23 02:40:34,836 INFO L226 Difference]: Without dead ends: 56798 [2021-11-23 02:40:35,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:35,111 INFO L933 BasicCegarLoop]: 5375 mSDtfsCounter, 4115 mSDsluCounter, 9437 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 332 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4283 SdHoareTripleChecker+Valid, 13961 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:35,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4283 Valid, 13961 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 2133 Invalid, 3 Unknown, 0 Unchecked, 17.0s Time] [2021-11-23 02:40:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56798 states. [2021-11-23 02:40:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56798 to 54906. [2021-11-23 02:40:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54906 states, 31721 states have (on average 1.3132309826298036) internal successors, (41657), 33266 states have internal predecessors, (41657), 19936 states have call successors, (19936), 3248 states have call predecessors, (19936), 3248 states have return successors, (20009), 19431 states have call predecessors, (20009), 19934 states have call successors, (20009) [2021-11-23 02:40:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54906 states to 54906 states and 81602 transitions. [2021-11-23 02:40:38,371 INFO L78 Accepts]: Start accepts. Automaton has 54906 states and 81602 transitions. Word has length 78 [2021-11-23 02:40:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 54906 states and 81602 transitions. [2021-11-23 02:40:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:40:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 54906 states and 81602 transitions. [2021-11-23 02:40:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:40:38,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:38,412 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, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:38,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:40:38,413 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:38,413 INFO L85 PathProgramCache]: Analyzing trace with hash -119517202, now seen corresponding path program 1 times [2021-11-23 02:40:38,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:38,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069159093] [2021-11-23 02:40:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:38,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:40:38,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:38,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069159093] [2021-11-23 02:40:38,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069159093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:38,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:38,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:40:38,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525651809] [2021-11-23 02:40:38,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:38,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:40:38,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:40:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:40:38,615 INFO L87 Difference]: Start difference. First operand 54906 states and 81602 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:40:40,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:43,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:40:45,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:40:47,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:40:52,563 WARN L534 Checker$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 02:40:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:55,365 INFO L93 Difference]: Finished difference Result 54908 states and 81603 transitions. [2021-11-23 02:40:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:40:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2021-11-23 02:40:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:55,683 INFO L225 Difference]: With dead ends: 54908 [2021-11-23 02:40:55,684 INFO L226 Difference]: Without dead ends: 54905 [2021-11-23 02:40:55,708 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 02:40:55,708 INFO L933 BasicCegarLoop]: 3618 mSDtfsCounter, 437 mSDsluCounter, 3592 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 6885 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:55,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 6885 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 703 Invalid, 4 Unknown, 0 Unchecked, 15.2s Time] [2021-11-23 02:40:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54905 states. [2021-11-23 02:40:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54905 to 54905. [2021-11-23 02:40:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54905 states, 31721 states have (on average 1.3127896346269032) internal successors, (41643), 33265 states have internal predecessors, (41643), 19935 states have call successors, (19935), 3248 states have call predecessors, (19935), 3248 states have return successors, (20009), 19431 states have call predecessors, (20009), 19934 states have call successors, (20009) [2021-11-23 02:40:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54905 states to 54905 states and 81587 transitions. [2021-11-23 02:40:58,824 INFO L78 Accepts]: Start accepts. Automaton has 54905 states and 81587 transitions. Word has length 77 [2021-11-23 02:40:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:58,824 INFO L470 AbstractCegarLoop]: Abstraction has 54905 states and 81587 transitions. [2021-11-23 02:40:58,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:40:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54905 states and 81587 transitions. [2021-11-23 02:40:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 02:40:58,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:58,868 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:58,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:40:58,869 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash 478412338, now seen corresponding path program 1 times [2021-11-23 02:40:58,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792259328] [2021-11-23 02:40:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:58,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:40:59,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792259328] [2021-11-23 02:40:59,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792259328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:59,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:59,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:40:59,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117976415] [2021-11-23 02:40:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:59,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:40:59,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:40:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:40:59,016 INFO L87 Difference]: Start difference. First operand 54905 states and 81587 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:41:01,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:04,322 WARN L534 Checker$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 02:41:06,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:08,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:10,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:17,992 INFO L93 Difference]: Finished difference Result 143257 states and 212435 transitions. [2021-11-23 02:41:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2021-11-23 02:41:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:18,484 INFO L225 Difference]: With dead ends: 143257 [2021-11-23 02:41:18,484 INFO L226 Difference]: Without dead ends: 88353 [2021-11-23 02:41:18,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:18,806 INFO L933 BasicCegarLoop]: 5905 mSDtfsCounter, 3612 mSDsluCounter, 3645 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3615 SdHoareTripleChecker+Valid, 9222 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:18,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3615 Valid, 9222 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 867 Invalid, 3 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 02:41:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88353 states. [2021-11-23 02:41:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88353 to 67643. [2021-11-23 02:41:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67643 states, 38946 states have (on average 1.3111230935140965) internal successors, (51063), 40823 states have internal predecessors, (51063), 24693 states have call successors, (24693), 4003 states have call predecessors, (24693), 4003 states have return successors, (24779), 24070 states have call predecessors, (24779), 24692 states have call successors, (24779) [2021-11-23 02:41:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67643 states to 67643 states and 100535 transitions. [2021-11-23 02:41:23,442 INFO L78 Accepts]: Start accepts. Automaton has 67643 states and 100535 transitions. Word has length 81 [2021-11-23 02:41:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:23,442 INFO L470 AbstractCegarLoop]: Abstraction has 67643 states and 100535 transitions. [2021-11-23 02:41:23,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:41:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 67643 states and 100535 transitions. [2021-11-23 02:41:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 02:41:23,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:23,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:23,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:41:23,474 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2060115672, now seen corresponding path program 1 times [2021-11-23 02:41:23,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:23,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544389934] [2021-11-23 02:41:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:23,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:41:23,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:23,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544389934] [2021-11-23 02:41:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544389934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:23,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:41:23,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551634783] [2021-11-23 02:41:23,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:23,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:41:23,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:41:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:41:23,991 INFO L87 Difference]: Start difference. First operand 67643 states and 100535 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:41:26,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:29,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:41:33,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:35,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:41:37,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:41,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:59,493 INFO L93 Difference]: Finished difference Result 166756 states and 247922 transitions. [2021-11-23 02:41:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:41:59,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2021-11-23 02:41:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:00,281 INFO L225 Difference]: With dead ends: 166756 [2021-11-23 02:42:00,281 INFO L226 Difference]: Without dead ends: 100196 [2021-11-23 02:42:00,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:42:00,506 INFO L933 BasicCegarLoop]: 6869 mSDtfsCounter, 7255 mSDsluCounter, 4242 mSDsCounter, 0 mSdLazyCounter, 4861 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7261 SdHoareTripleChecker+Valid, 10450 SdHoareTripleChecker+Invalid, 4870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4861 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:00,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7261 Valid, 10450 Invalid, 4870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4861 Invalid, 4 Unknown, 0 Unchecked, 31.0s Time] [2021-11-23 02:42:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100196 states. [2021-11-23 02:42:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100196 to 100184. [2021-11-23 02:42:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100184 states, 57700 states have (on average 1.3114038128249568) internal successors, (75668), 60461 states have internal predecessors, (75668), 36583 states have call successors, (36583), 5900 states have call predecessors, (36583), 5900 states have return successors, (36712), 35657 states have call predecessors, (36712), 36582 states have call successors, (36712) [2021-11-23 02:42:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100184 states to 100184 states and 148963 transitions. [2021-11-23 02:42:07,414 INFO L78 Accepts]: Start accepts. Automaton has 100184 states and 148963 transitions. Word has length 84 [2021-11-23 02:42:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:07,414 INFO L470 AbstractCegarLoop]: Abstraction has 100184 states and 148963 transitions. [2021-11-23 02:42:07,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:42:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 100184 states and 148963 transitions. [2021-11-23 02:42:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 02:42:07,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:07,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:07,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:42:07,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1183257117, now seen corresponding path program 1 times [2021-11-23 02:42:07,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:07,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945193902] [2021-11-23 02:42:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:07,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:42:08,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945193902] [2021-11-23 02:42:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945193902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:08,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:08,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:42:08,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630023243] [2021-11-23 02:42:08,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:08,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:42:08,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:42:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:42:08,114 INFO L87 Difference]: Start difference. First operand 100184 states and 148963 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:42:10,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:12,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:42:14,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []